Ryzen

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AMD Ryzen
AMD ryzen stylized.svg
ProducedFrom February 2017 to present
Marketed byAMD
Designed byAMD
Common manufacturer(s)
Max. CPU clock rate3.0 GHz to 4.6 GHz
Min. feature size14nm to 7nm
Instruction setAMD64/x86-64, MMX(+), SSE1, SSE2, SSE3, SSSE3, SSE4a, SSE4.1, SSE4.2, AES, CLMUL, AVX, AVX2, FMA3, CVT16/F16C, ABM, BMI1, BMI2, SHA
MicroarchitectureZen
Zen+
Zen 2
CoresUp to 32 cores/64 threads
Transistors4.8 billion for Zen & Zen+ (per 8 cores)[1]
Socket(s)
PredecessorFX

Ryzen (/ˈrzən/ RY-zən)[2] is a brand[3] of x86-64 microprocessors designed and marketed by Advanced Micro Devices Inc. (AMD) for desktop, mobile and embedded platforms based on the Zen microarchitecture and its successors. It consists of central processing units marketed for mainstream, enthusiast and workstation segments and accelerated processing units (APUs) marketed for mainstream and entry-level segments and embedded applications.

AMD officially announced the first 14nm Ryzen products during its New Horizon summit on December 13, 2016 and introduced them the following February.[4] The second generation of Ryzen CPUs featuring the Zen+ microarchitecture, an incremental improvement built on a 12nm process technology, was released in April 2018.[5] The third generation, based on Zen 2 and featuring more significant design improvements and a further shrink to TSMC's 7nm process, launched on July 7, 2019.

While the majority of Ryzen-branded products are for use with the Socket AM4 platform, in August 2017 AMD added a line of high core count desktop processors aimed at the workstation market with the Ryzen Threadripper branding. Threadripper uses the larger TR4 socket, which supports more memory channels and PCI Express lanes.[6][7]

History[edit]

In the five years before the release of Ryzen, AMD's direct competitor in the x86 and x86-64 consumer-level CPU marketspace, Intel, had continued to grow its market share with the tick-tock improvement cycle of its Core series of microprocessors.[8] Since the release of its Bulldozer microarchitecture in 2011, AMD's CPUs had fallen progressively behind those from Intel in both single- and multi-core performance.[9] Despite a die shrink and several revisions of the Bulldozer architecture, performance and power efficiency failed to catch up with Intel's competing products.[citation needed]

Ryzen is the consumer-level implementation of the newer Zen microarchitecture, a complete re-design that marked the return of AMD to the high-end CPU market, offering a product stack able to compete with Intel at every level.[10][11] Having more processing cores, Ryzen processors offer greater multi-threaded performance at the same price point relative to Intel's Core processors.[12] The Zen architecture delivers more than 52% improvement in instructions-per-clock cycle over the previous-generation Bulldozer AMD core, without increasing power consumption.[13] Since the release of Ryzen, AMD's CPU market share has increased while Intel appears to have stagnated.[8]

Product lineup[edit]

Zen microarchitecture[edit]

CPUs: Summit Ridge (Ryzen) and Whitehaven (Ryzen Threadripper)[edit]

  • Socket AM4 for Ryzen and Socket TR4 for Ryzen Threadripper.[14][15]
  • 4.8 billion transistors per 192 mm2[16] 8-core "Zeppelin" die[1] with one die being used for Ryzen and two for Ryzen Threadripper.
  • Stepping: B1[17]
  • Memory support:
    • Ryzen dual-channel: DDR4–2666 ×2 single rank, DDR4–2400 ×2 dual rank, DDR4–2133 ×4 single rank, or DDR4–1866 ×4 dual rank.[14][18]
    • Ryzen Threadripper quad-channel: DDR4–2666 ×4 single rank, DDR4–2400 ×4 dual rank, DDR4–2133 ×8 single rank, or DDR4–1866 ×8 dual rank.
  • Instructions Sets: x87, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, CLMUL, AVX, AVX2, FMA3, CVT16/F16C, ABM, BMI1, BMI2, SHA.[19]
  • All Ryzen-branded CPUs feature unlocked multipliers.
  • AMD's SenseMI Technology monitors the processor continuously and uses Infinity Control Fabric to offer the following features:[14][20][21]
    • Pure Power reduces the entire ramp of processor voltage and clock speed, for light loads.
    • Precision Boost increases the processor voltage and clock speed by 100–200 MHz if three or more cores are active (five or more, in the case of Threadripper, and by 300 MHz); and significantly further when less than three are active (less than five, in the case of Threadripper).[22]
    • XFR (eXtended Frequency Range) aims to maintain the average clock speed closer to the maximum Precision Boost, when sufficient cooling is available.[23]
    • Neural Net Prediction and Smart Prefetch use perceptron based neural branch prediction inside the processor to optimize instruction workflow and cache management.
  • Ryzen launched in conjunction with a line of stock coolers for Socket AM4: the Wraith Stealth, Wraith Spire and Wraith Max. This line succeeds the original AMD Wraith cooler, which was released in mid-2016.[24] The Wraith Stealth is a bundled low-profile unit meant for the lower-end CPUs with a rating for a TDP of 65 W, whereas the Wraith Spire is the bundled mainstream cooler with a TDP rating of 95 W, along with optional RGB lighting on certain models. The Wraith Max is a larger cooler incorporating heatpipes, rated for a 140W TDP.
Model Release Date
& Price
Cores
(threads)
Clock rate (GHz) Cache[a] Socket PCIe lanes[b] Memory
support
TDP
Base Precision Boost
1–2
(≥3)
L1 L2 L3
Entry-level
Ryzen 3 1200[c][29][30][31] July 27, 2017
US $109
4 (4) 3.1 3.4
(?)
384 KB [32][33][34][35][36][37][38] 512 KB per core [39][40][41] 8 MB AM4 24[42] DDR4-2666
dual-channel
65 W [43]
Ryzen 3 1300X[c][29][30] July 27, 2017
US $129
3.5 3.7
(?)
Mainstream
Ryzen 5 1400 April 11, 2017
US $169
4 (8) 3.2 3.4
(?)
384 KB [32][33][34][35][36][37][38] 512 KB per core [39][40][41] 8 MB AM4 24[42] DDR4-2666
dual-channel
65 W [43]
Ryzen 5 1500X[c] April 11, 2017
US $189
3.5 3.7
(3.6)
16 MB
Ryzen 5 1600[c] April 11, 2017
US $219
6 (12) 3.2 3.6
(3.4)
576 KB [44][45][46]
Ryzen 5 1600X April 11, 2017
US $249
3.6 4.0
(3.7)
95 W
Performance
Ryzen 7 1700[c] March 2, 2017
US $329
8 (16) 3.0 3.7
(3.2)
768 KB [47][48][48][49] 512 KB per core [39][40][41] 16 MB AM4 24[42] DDR4-2666
dual-channel
65 W
Ryzen 7 1700X[c] Mar 2, 2017
US $399
3.4 3.8[50]
(3.5)
95 W
Ryzen 7 1800X March 2, 2017
US $499
3.6 4.0
(3.7)
High-end desktop (HEDT)
Ryzen Threadripper 1900X[39][51][52] August 31, 2017
US $549
8 (16) 3.8 4.0
(3.9)[53][54]
768 KB 512 KB per core [40][41] 16 MB TR4[6] 64[7] DDR4-2666
quad-channel[6][55]
180 W
Ryzen Threadripper 1920X[56][39] August 10, 2017
US $799
12 (24) 3.5 4.05[57]
(3.7)[58]
1152 KB [41] 32 MB [40][41]
Ryzen Threadripper 1950X[56][39] August 10, 2017
US $999
16 (32) 3.4 4.0
(3.7)
1536 KB [40]
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ PCIe lane count includes 4 lanes used for connectivity to the chipset.[26]
  3. ^ a b c d e f Model also available as Pro variant for OEMs, which may offer additional features not listed in this table. Pro models were released by AMD on June 29, 2017.[27][28]

APUs: Raven Ridge[edit]

  • 4.95 billion[59] transistors on a 210 mm2 die,[59] based on a modified 14nm Zeppelin die where four of the cores are replaced by an integrated fifth-generation GCN-based GPU.
  • 16 external PCIe 3.0 lanes (four each to chipset and M.2 socket; eight to a PCIe slot). 16 internal PCIe 3.0 lanes for the integrated GPU and on-board I/O.[citation needed]
Mobile[edit]

In May 2017, AMD demonstrated a Ryzen mobile APU with four Zen CPU cores and Radeon Vega-based GPU.[60] The first Ryzen mobile APUs were officially released in October 2017.[61]

Model Release
date
CPU GPU Memory support TDP Part number
Cores
(threads)
Clock rate (GHz) Cache[a] Model Config[b] Clock Processing power (GFLOPS)[c]
Base Boost L2 L3
Athlon Pro 200U[62] 2019 2 (4) 2.3 3.2 1 MB 4 MB Vega 3 192:12:4
3 CU [63]
1000 MHz 384 DDR4-2400 dual-channel 12–25 W (configurable) YM200UC4T2OFB
Ryzen 3 2200U[64] January 8, 2018 2.5 3.4 1100 MHz 422.4 YM2200C4T2OFB
Ryzen 3 2300U[65] 4 (4) 2.0 2 MB Vega 6 384:24:8
6 CU [66]
844.8 YM2300C4T4MFB
Ryzen 3 Pro 2300U[67] May 15, 2018 [68] YM230BC4T4MFB
Ryzen 5 2500U[69] October 26, 2017[69] 4 (8) 3.6 Vega 8 512:32:16
8 CU [70]
1126.4 YM2500C4T4MFB
Ryzen 5 Pro 2500U[71] May 15, 2018 [68] YM250BC4T4MFB
Ryzen 5 2600H[72] September 10, 2018[73] 3.2 DDR4-3200 dual-channel 35–54 W (configurable) YM2600C3T4MFB
Ryzen 7 2700U[74] October 26, 2017[74] 2.2 3.8 Vega 10 640:40:16
10 CU [75]
1300 MHz 1664 DDR4-2400 dual-channel 12–25 W (configurable) YM2700C4T4MFB
Ryzen 7 Pro 2700U[76] May 15, 2018 [68] YM270BC4T4MFB
Ryzen 7 2800H[72] September 10, 2018[73] 3.3 Vega 11 704:44:16
11 CU
1830.4 DDR4-3200 dual-channel 35–54 W (configurable) YM2800C3T4MFB
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ Unified Shaders : Texture Mapping Units : Render Output Units and Compute Units (CU)
  3. ^ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.
Desktop[edit]

In January 2018, AMD announced the first two Ryzen desktop processors with integrated Radeon Vega graphics under the Raven Ridge codename. The Ryzen 3 2200G and the Ryzen 5 2400G were released in February.[77] Other Raven Ridge processors were added later that year, with the most basic of entry level products appearing under the re-launched Athlon branding and with locked clock multipliers.

Model Release Date
& Price
CPU GPU Memory
support
TDP
Cores
(threads)
Clock rate (GHz) Cache[a] Model Config[b] Clock Processing power (GFLOPS)[c]
Base Boost L2 L3
Athlon 200GE[78][79] September 6, 2018
US $55
2 (4) 3.2 N/A 1 MB 4 MB Vega 3 192:12:4
3 CU
1000 MHz 384 DDR4-2666
dual-channel
35 W
Athlon Pro 200GE[80][79] September 6, 2018
OEM
Athlon 220GE[81] December 21, 2018
US $65
3.4
Athlon 240GE[81] December 21, 2018
US $75
3.5
Ryzen 3 2200GE[82][83] April 19, 2018
OEM
4 (4) 3.2 3.6 2 MB 4 MB RX Vega 8 512:32:16
8 CU
1100 MHz 1126 DDR4-2933
dual-channel
Ryzen 3 Pro 2200GE[84] May 10, 2018
OEM
Ryzen 3 2200G[85][86] February 12, 2018[87]
US $99
3.5 3.7 45–65 W (configurable)
Ryzen 3 Pro 2200G[88] May 10, 2018
OEM
Ryzen 5 2400GE[89][83] April 19, 2018
OEM
4 (8) 3.2 3.8 RX Vega 11 704:44:16
11 CU[90]
1250 MHz 1760 35 W
Ryzen 5 Pro 2400GE[91] May 10, 2018
OEM
Ryzen 5 2400G[92][86] February 12, 2018[87][93]
US $169
3.6 3.9 45–65 W (configurable)
Ryzen 5 Pro 2400G[94] May 10, 2018
OEM
  1. ^ AMD defines 1 kilobyte (kB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ Unified Shaders : Texture Mapping Units : Render Output Units and Compute Units (CU)
  3. ^ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.
Embedded[edit]

In February 2018, AMD announced the V1000 series of embedded Zen+Vega APUs with four SKUs.[95]

Model Release
date
CPU GPU Memory
support
TDP
Cores
(threads)
Clock rate (GHz) Cache[a] Model Config[b] Clock Processing power
(GFLOPS)[c]
Base Boost L2 L3
V1202B Unknown 2 (4) 2.3 3.2 1 MB 4 MB RX Vega 3 192:12:16
3 CU
1000 MHz 384 DDR4-2400
dual-channel
12–25 W
V1605B Unknown 4 (8) 2.0 3.6 2 MB RX Vega 8 512:32:16
8 CU
1100 MHz 1126.4
V1756B Unknown 3.25 1300 MHz 1331.2 DDR4-3200
dual-channel
35–54 W
V1807B Unknown 3.35 3.8 RX Vega 11 704:44:16
11 CU
1830.4
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ Unified Shaders : Texture Mapping Units : Render Output Units and Compute Units (CU)
  3. ^ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

In April 2019, AMD announced another line of embedded Zen+Vega APUs, namely the Ryzen Embedded R1000 series with two SKUs.[96]

Model Release date CPU GPU Memory support TDP Socket
Cores (threads) Clock rate (GHz) Cache Model Config Clock
Base Boost L2 L3
R1505G April 16, 2019 2 (4) 2.4 3.3 1 MB 4 MB Radeon Vega 3 3 CU 1000 MHz DDR4-2400 dual-channel with ECC 12-25 W FP5
R1606G 2.6 3.5 1200 MHz

Zen+ microarchitecture[edit]

CPUs: Pinnacle Ridge (Ryzen) and Colfax (Ryzen Threadripper)[edit]

The first of the Ryzen 2000 series of CPU products based on the 12nm Zen+ microarchitecture, code named Pinnacle Ridge and featuring improved Precision Boost 2 technology,[97] were announced for preorder on April 13, 2018[98] and launched six days later. The new Wraith Prism cooler was bundled with the Ryzen 7 2700X. The first of the 2000 series of Ryzen Threadripper products, introducing Precision Boost Overdrive technology,[23] followed in August.

Model Release Date
& Price
Cores
(threads)
Clock rate (GHz) Cache[a] Socket PCIe
lanes[b]
Memory
support
TDP
Base PB2 L1 L2 L3
Entry-level
Ryzen 3 2300X[100][101] September 11, 2018
OEM
4 (4) 3.5 4.0 384 KB 512 KB
per core
8 MB AM4 24 DDR4-2933
dual-channel
65 W
Mainstream
Ryzen 5 2500X[100][101] September 11, 2018
OEM
4 (8) 3.6 4.0 384 KB 512 KB
per core
8 MB AM4 24 DDR4-2933
dual-channel
65 W
Ryzen 5 2600E[100] September 11, 2018
OEM
6 (12) 3.1 4.0 578 KB (?) 16 MB DDR4-2666
dual-channel[102]
45 W
Ryzen 5 2600[c][104][105] April 19, 2018
US $199
3.4 3.9 576 KB DDR4-2933
dual-channel
65 W
Ryzen 5 2600X[104][105] April 19, 2018
US $229
3.6 4.2 576 KB 95 W
Performance
Ryzen 7 2700E[100] September 11, 2018
OEM
8 (16) 2.8 4.0 768 KB 512 KB
per core
16 MB AM4 24 DDR4-2666
dual-channel[106]
45 W
Ryzen 7 2700[c][104][105] April 19, 2018
US $299
3.2 4.1 DDR4-2933
dual-channel
65 W
Ryzen 7 PRO 2700X[c] September 6, 2018
OEM
3.6 4.1 105 W
Ryzen 7 2700X[104][105] April 19, 2018
US $329
3.7 4.3
High-end desktop (HEDT)
Ryzen Threadripper 2920X[107][108] October 2018
US $649
12 (24) 3.5 4.3 1.125 MB 512 KB
per core
32 MB TR4 64 DDR4-2933
quad-channel
180 W
Ryzen Threadripper 2950X[107][108] August 31, 2018
US $899
16 (32) 3.5 4.4 1.5 MB
Ryzen Threadripper 2970WX[107][108] October 2018
US $1299
24 (48) 3.0 4.2 2.25 MB 64 MB 250 W
Ryzen Threadripper 2990WX[107][108] August 13, 2018
US $1799
32 (64) 3.0 4.2 3 MB
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ PCIe lane count includes 4 lanes used for connectivity to the chipset.[99]
  3. ^ a b c Model also available as PRO variant for OEMs, which may offer additional features not listed in this table. PRO models were released by AMD on September 6, 2018.[103]

APUs: Picasso[edit]

Picasso is the 12nm refresh of Raven Ridge, offering a modest increase in clock speeds (up to an additional 300MHz maximum boost), Precision Boost 2, an up to 3% increase in IPC from the move to the Zen+ core with its reduced cache and memory latencies, and newly added solder thermal interface material for the Ryzen 5 3400G desktop part.[109]

Mobile[edit]
Model Release
date
CPU GPU Memory support TDP Part number
Cores
(threads)
Clock rate (GHz) Cache[a] Model Config[b] Clock Processing power (GFLOPS)[c]
Base Boost L2 L3
Athlon 300U[110] January 6, 2019 2 (4) 2.4 3.3 1 MB 4 MB Vega 3 192:12:4
3 CU[111]
1000 MHz 384.0 DDR4-2400
dual-channel
15 W YM300UC4T2OFG
Ryzen 3 3200U[112] 2.6 3.5 1200 MHz 460.8 YM3200C4T2OFG
Ryzen 3 3300U[113] 4 (4) 2.1 2 MB Vega 6 384:24:8
6 CU[114]
921.6 YM3300C4T4MFG
Ryzen 5 3500U[115] 4 (8) 3.7 Vega 8 512:32:16
8 CU[116]
1228.8 YM3500C4T4MFG
Ryzen 5 3550H[117] 35 W YM3500C4T4MFG
Ryzen 7 3700U[118] 2.3 4.0 Vega 10 640:40:16
10 CU[119]
1400 MHz 1792.0 15 W YM3700C4T4MFG
Ryzen 7 3750H[120] 35 W YM3700C4T4MFG
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ Unified Shaders : Texture Mapping Units : Render Output Units and Compute Units (CU)
  3. ^ Single precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.
Desktop[edit]
Model Release Date
& Price
CPU GPU Memory
support
TDP
Cores
(threads)
Clock rate (GHz) Cache[a] Model Config[b] Clock Processing power
(GFLOPS)[c]
Base Boost L2 L3
Ryzen 3 3200G[109] July 7, 2019
US $99
4 (4) 3.6 4.0 2 MB 4 MB RX Vega 8 512:32:16
8 CU
1250 MHz 1280 DDR4-2933
dual-channel
65 W
Ryzen 5 3400G[109] July 7, 2019
US $149
4 (8) 3.7 4.2 RX Vega 11 704:44:16
11 CU
1400 MHz 1971.2
  1. ^ AMD defines 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]
  2. ^ Unified Shaders : Texture Mapping Units : Render Output Units and Compute Units (CU)
  3. ^ Single-precision performance is calculated from the base (or boost) core clock speed based on a FMA operation.

Zen 2 microarchitecture[edit]

CPUs: Matisse[edit]

On May 27, 2019, AMD launched its third generation of Ryzen processors using its chiplet-based Zen 2 architecture at Computex in Taipei. The chiplet design separates the CPU cores, fabricated on TSMC's 7nm process, and the I/O, fabricated on GlobalFoundries' 12nm process, and connects them via Infinity Fabric.[121] The Ryzen 3000 series uses the same AM4 socket as earlier models and is the first CPU to offer PCIe version 4 connectivity.[122] The new architecture offers a 15% instruction-per-clock (IPC) uplift and a reduction in energy usage. Other improvements include a doubling of the L3 cache size, a re-optimized L1 instruction cache, a larger op. cache, double the floating point performance, improved branch prediction, and better instruction pre-fetching.[121] The six-, eight- and 12-core SKUs became generally available on July 7, 2019.

Model Release Date
& Price
Cores
(threads)
Clock rate (GHz) Cache[a] Socket PCIe
lanes
Memory
support
TDP
Base Boost L1 L2 L3
Mainstream
Ryzen 5 3600 July 7, 2019
US $199
6 (12) 3.6 4.2 64 KiB
per core
512 KiB
per core
32 MiB AM4 24 DDR4-3200
dual-channel
65 W
Ryzen 5 3600X July 7, 2019
US $249
3.8 4.4 95 W
Performance
Ryzen 7 3700X July 7, 2019
US $329
8 (16) 3.6 4.4 64 KiB
per core
512 KiB
per core
32 MiB AM4 24 DDR4-3200
dual-channel
65 W
Ryzen 7 3800X July 7, 2019
US $399
3.9 4.5 105 W
Enthusiast
Ryzen 9 3900X July 7, 2019
US $499
12 (24) 3.8 4.6 64 KiB
per core
512 KiB
per core
64 MiB AM4 24 DDR4-3200
dual-channel
105 W
Ryzen 9 3950X Sep, 2019
US $749
16 (32) 3.5 4.7
  1. ^ AMD advertises cache numbers with "KB" and "MB", but defines these to be the values of KiB and MiB, i.e, 1 kilobyte (KB) as 1024 bytes, and 1 megabyte (MB) as 1024 kilobytes.[25]

The six- and eight-core processors have one core chiplet, while above this, the parts have two core chiplets. In all cases the I/O die is the same.[121]

Initial reception[edit]

The first Ryzen 7 (1700, 1700X, and 1800X) processors debuted in early March 2017 and were generally well received by hardware reviewers.[123][124][125] Ryzen was the first brand new architecture from AMD in five years, and without very much initial fine-tuning or optimization, it ran generally well for reviewers.[126] Initial Ryzen chips ran well with software and games already on the market, performing exceptionally well in workstation scenarios, and well in most gaming scenarios. Compared to Piledriver-powered FX chips, Zen-powered Ryzen chips ran cooler, much faster, and used less power. IPC uplift was eventually gauged to be 52% higher than Excavator, which was two full generations ahead of the architecture still being used in AMD's FX-series desktop predecessors like the FX-8350 and FX-8370.[1] Though Zen fell short of Intel's Kaby Lake in terms of IPC, and therefore single-threaded throughput, it compensated by offering more cores to applications that can use them. Power consumption and heat were found to be highly competitive with Intel, and the included Wraith coolers were generally competitive with higher-priced aftermarket solutions.

Ryzen 1800X's multi-threaded performance, in some cases while using Blender or other open-source software, was around four times the performance of the FX-8370, or nearly double that of the i7 7700K.[127] One reviewer found that Ryzen chips would typically outperform competing Intel i7 processors for a fraction of the price when all eight cores were utilized.[127]

One complaint among a subset of reviewers, however, was that Ryzen processors fell behind their Intel counterparts when running older games, or running certain newer games at mainstream resolutions such as 720p or 1080p.[128] AMD acknowledged the gaming performance deficit at low resolutions during a Reddit "Ask Me Anything" thread, where it explained that updates and patches were being developed.[129] Subsequent updates to Ashes of the Singularity: Escalation and Rise of the Tomb Raider increased frame rates by 17 to 31% on Ryzen systems.[130][131] Publisher id Software announced in April 2017 it would optimize its future games to make use of the greater parallelism available on Ryzen CPUs.[132]

It has been suggested that low threaded applications often result in Ryzen processors being underutilized, producing lower than expected benchmark scores, due to the fact that Zen relies on its core count to make up for its lower IPC rating than that of Kaby Lake.[133][134][135] However, AMD and others have argued thread scheduling is not the fundamental issue to Windows 10 performance.[136][137] Early AM4 motherboards were also hindered by BIOS bugs and poor DDR4 memory support.[citation needed]

Operating system support[edit]

Windows[edit]

AMD verified that computers with Ryzen processors can boot Windows 7 and Windows 8 but on newer hardware, including AMD Ryzen and Intel Kaby Lake and later, Microsoft only officially supports the use of Windows 10. Windows Update blocks updates from being installed on newer systems running older versions of Windows, though that restriction can be circumvented with an unofficial patch.[138]

Although AMD initially announced that Ryzen chipset drivers would not be provided for Windows 7,[139] its chipset driver packages do in fact list and include them.[140]

Linux[edit]

The full performance of Ryzen processors is available with Linux kernel version 4.10 or newer.[141]

Known issues[edit]

Spectre[edit]

Substantially all modern high performance microprocessors, including Ryzen, were found to be susceptible to a new category of speculative execution vulnerabilities. The vulnerabilities can be mitigated without hardware changes via microcode updates and operating system workarounds, but the mitigations incur a performance penalty.[142] AMD Ryzen and Epyc suffer a zero to 9% penalty from the mitigations, depending on workload, comparing favorably with a penalty of in some cases more than 50% for Intel Core and Xeon processors,[143][144] in part as a result of the AMD processors not requiring mitigation against the related Meltdown vulnerability.[145]

AMD has announced that Zen 2, launching in 2019, will include a hardware fix.[121]

Segmentation fault[edit]

Some early shipments of Ryzen 1000 series processors produced segmentation faults on certain workloads on Linux, especially while compiling code with GCC.[146] AMD offered to replace the affected processors with newer ones that are not affected by the problem.[147]

Alleged issues by CTS Labs[edit]

In early 2018, an Israeli cyber-security consultancy firm called CTS Labs claimed to have discovered several major flaws in the Ryzen components ecosystem,[148] publicly disclosing them after giving AMD only 24 hours to react and raising concerns and questions regarding their legitimacy,[149][150] though they were later confirmed by two separate security firms.[151] AMD has since announced that while the flaws are real and would be fixed via microcode updates, they were severely overplayed as physical access to the hardware is required to exploit them.[152]

See also[edit]

References[edit]

  1. ^ a b c Cutress, Ian. "AMD Launches Ryzen: 52% More IPC, Eight Cores for Under $330, Pre-order Today, On Sale March 2nd". AnandTech.
  2. ^ Cutress, Ian (13 December 2016). "AMD Gives More Zen Details: Ryzen, 3.4 GHz+, NVMe, Neural Net Prediction, & 25 MHz Boost Steps". AnandTech.
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External links[edit]