|CPU supported||Core 2 (Quad, Duo, Extreme)
Celeron (Core architecture)
|Socket supported||LGA 775|
|Fabrication process||90 nm|
|Southbridge(s)||ICH9 or ICH9R|
|Release date(s)||June 2007|
The P35 Express (codenamed Bearlake) is a mainstream desktop computer chipset from Intel released in June 2007, although motherboards featuring the chipset were available a month earlier. The P35 Express chipset supports Intel's LGA 775 socket and Core 2 Duo and Quad processors, and is also known to support 45 nm Wolfdale/Yorkfield dual and quad core CPUs. Theoretically, Intel also dropped support for Intel's Pentium 4 and Pentium D processors with this chipset although late Pentium 4 processors, including both the 32-bit-only (5x0) and the 32-bit/64-bit (5x1), and a few others, were fully supported.
It is notable for providing the first commodity support of DDR3 SDRAM. (It also supports DDR2 SDRAM; the choice is made by the motherboard manufacturer, and some manufacturers supported both DDR3 and DDR2 on the same motherboard, but only one memory type at a time, often 4× DDR2 or 2× DDR3, as in the Gigabyte GA-EP35C-DS3L/R; but DDR3-only models, such as the Gigabyte GA-EP35T-DS3L/R and the DDR2-only models, such as the Gigabyte GA-EP35-DS3L/R were also made, concurrently.) Another notable point is that it does not provide Parallel ATA support; most 2007 motherboards added PATA support via a JMicron JMB361 or JMB363 chip.
- 1333/1066/800 MT/s front-side bus (FSB)
- PCI Express 1.1
- Up to ×16 interface with 8 GB/s total bandwidth (4GBps down, 4GBps up).
- Some motherboards support Crossfire. No SLI support.
- Intel Fast Memory Access
- Updated Memory Controller Hub (MCH) to increase performance and reduce latency.
- Dual-channel DDR2 memory
- Up to 12.8 GB/s bandwidth and 8 GB addressable memory.
- Dual-channel DDR3 memory
- Up to 17 GB/s bandwidth and 8 GB addressable memory.
- Intel Flex Memory Technology
- Allows different memory sizes in dual-channel mode.
- Intel High Definition Audio
- Intel Matrix Storage Technology
- Intel Rapid Recover Technology
- Intel Turbo Memory
- SATA 3 Gbit/s
- eSATA/Port Multiplier (Hot-plug and Port Multiplier is a BIOS option which few motherboards actually support)
- SATA Port Disable
- USB Port Disable
- Allows disabling/enabling of individual USB ports for enhanced security.
- Intel Quiet System Technology
- Automated system fan speed control.
- "Intel talks P45, G45 and X48". bit-tech.net. March 7, 2008. Retrieved 2008-03-25.
- "Thermal and Mechanical Design Guidelines" (PDF). Intel. October 2007. Retrieved 2008-03-25.
- "Intel Introduces '3-Series' Chipsets at Computex" (Press release). Intel. June 5, 2007. Retrieved 2007-10-23.
- "Gigabyte to release eight P35 motherboards". BeHardware. May 9, 2007. Retrieved 2008-03-25.
- "The 3-Series Chipset Family". Tom's Hardware Guide. Retrieved 2008-07-10.