Intel P35: Intel's Mainstream Chipset Grows Up
by Gary Key & Wesley Fink on May 21, 2007 3:45 PM EST- Posted in
- CPUs
P35 Express - June 4th
For today, the chipset that will most interest our readers is the P35 Express, which replaces the P965.
P35 will launch in both DDR3 and DDR2 versions, as you have already seen in DDR3 vs. DDR2 and Intel P35 Memory Performance: A Closer Look. No matter which memory version you chose the performance will be faster on P35 than on P965 or 975X. You will get the best memory performance from the new P35 chipset by running the processor bus at 1333 FSB. Intel has also improved their support for AMD/ATI CrossFire Graphics with the P35 chipset. Where the existing P965 struggled with a second x4 PCIe slot in CrossFire , P35 has official support for a pair of x8 PCI Express slots for the video cards and CrossFire if the manufacturer supports this setup. However, current P35 boards still utilize the x16/x4 design. With the new CrossFire internal connectors, running CrossFire on P35 is much simpler than CrossFire on P965.
| Intel P35/ICH9 Specifications | |||
| Chip | Mfg Process | Transistor Count | TDP |
| P35 | 90 nm | 45 Million | 16W |
| ICH9 | 130 nm | 4.6 Million | 4W |
The P35 chipset also features the new ICH9 series MCH, most likely the ICH9R on top P35 boards. Compared to P965 the ICH9 extends SATA to a total of six native SATA ports, expands USB 2.0 to twelve ports, and adds an eSATA port with port multiplier and port disable. Chipset power consumption for both the P35 and ICH9 are also very reasonable, with TDP for both chipsets rated at a total of 20 watts. Those who have complained about the hot-running NVIDIA chipsets will appreciate the lower power specification.
Intel also adds the Turbo Memory option, which can be a PCIe x1 card or NAND memory soldered on the motherboard. Desktop Turbo Memory is fully supported by Windows Vista but can only be activated in the P35 chipset by selecting AHCI support for the disk controllers. We will provide performance results of this feature in an upcoming storage article.
The Intel Matrix Storage is another area that has been improved on the ICH9 family. Intel claims that the new Matrix Storage Technology combined with optional Turbo Memory can enhance application loading, startup and speed up general usage by up to 34%. However, in preliminary testing we have only seen improvements of up 7% in certain scenarios.
You have already seen DDR3 and DDR2 memory test results with the ASUS P5K Deluxe (DDR2) and the ASUS P5K3 Deluxe (DDR3). We will take a closer look at the performance of these two P35 boards in this review. Performance results are also presented for the MSI P35 Platinum and Gigabyte P35-DQ6. With this broad cross-section of four P35 boards from Tier 1 manufacturers you should have the information you need to decide if P35 is your next motherboard.
P35 motherboard features and photos begin on p.6. P35 test results begin on p.10.
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Wesley Fink - Monday, May 21, 2007 - link
Early boards will be expensive, just like always. The prices will likely drop to the same levels as current P965 boards they replace, with a broad range for P35 boards from basic to "Asus Commando" level gaming boards. It is too early to be discouraged.Comdrpopnfresh - Tuesday, May 22, 2007 - link
I'm willing to bet we'll see them replacing the older boards quickly too. If intel and other manufacturers really want DDR3 to go through, you'll see DDR2 boards disappearing quickly. Its like what happened to s939. Basically the same chips were used for AM2, but the boards and chips quickly dried up and disappeared. The same can be said or PCI-e. In the beginning there wasn't much of a real world benefit, just the theoretical bandwidth increase. Because developments in AGP ceased, we might never know if the switch was necessary.Comdrpopnfresh - Monday, May 21, 2007 - link
If something other than NAND flash could be used, it would be very interesting to see a pci-e 1x board that can house DDR2 memory for use in turbo memory. That way, when people upgrade their ~35 boards to DDR3 when performance and price changes, the DDR2 can be used further. This would make a lot of sense too, because unlike Gigabyte's i-RAM device and logical ramdrives, the high speed, low latency properties of RAM could be used for turbo memory as a way around the 8gb limit of RAM on these cards. And since they are not used for storage, merely access, no redundancy on power supply is needed as with the i-RAM. Someone should start development on this...Comdrpopnfresh - Monday, May 21, 2007 - link
Why would the TDP on the P35 higher if it has no integrated video? Will third-party manufactures implement their own SLI into the P35 given that the reference model only had on x16 pci-e slot? Also, when can we expect to see pci-e2 and more than 4 dimm slots on intel mobos?yacoub - Monday, May 21, 2007 - link
Including a jumper to change the strap setting for the fsb is a nice feature on the MSi board. A little disappointed in the memory comparison test that that board had the lowest bandwidth and most latency. Is that something BIOS updates can improve or is that generally hardware (i.e. board design related)?Gary Key - Monday, May 21, 2007 - link
It is all BIOS tuning in regards to the MSI board. Our first results with the board had the memory performance being equal to the 945P boards. Two BIOS releases later and the improvements have been remarkable. I think MSI is about two BIOS spins behind ASUS and Gigabyte now. Gigabyte finally caught up but ASUS still has the better feature set and options in my opinion.michal1980 - Monday, May 21, 2007 - link
hardocp, seems to take a 180 different outlook on these boards. so werid.skaterdude - Monday, May 21, 2007 - link
What's so weird? Kyle is an extension of AMD's marketing department. He has not cared for Intel in a very long time, at least since he was caught cheating on some Intel benchmarks and was hung out to dry for it. Personally, it is alright to have a favorite company to root for but to do so in such an open and bias way is wrong if you are not running a company specific website. I would not have an issue at all if it was called HardAMD, at least you know what you are viewing is not tainted by free trips, booze, products, and general hostility against a company.
Back on subject....The P35 is a nice upgrade and it may not set the world on fire but it appears Intel listened and improved on a chipset they could have let ride for a lot longer. DDR3 will be interesting and at least the kinks will be worked out by the time X38 and the new processors get here. If I had not already bought a 965 board then P35 would have been the one. I am still miffed about not having a native IDE port as JMicron just plain sucks most of the time.
strikeback03 - Tuesday, May 22, 2007 - link
the P35 does not have native IDE either, and why use an IDE drive anyway?Spoelie - Monday, May 21, 2007 - link
ahum, AMD biased? After reading some of their recent gpu reviews, I thought it was the other way around... Check yourselfanyway, not a worthy upgrade, but a worthy new board. Which is what you could reasonably expect.