Performance on i865PE Based Mainboard
Besides the tests with i875P based mainboard, we also undertook a few experiments with a mainboard on i865PE. To tell the truth, Canterwood based mainboards are pretty expensive that is why many users are most likely to go for their less expensive analogues based on i865PE. Especially since almost all the leading mainboard manufacturers enable PAT technology on their i865PE based products, making i875P and i865PE based solutions equally fast.
Our test system was configured in the following way:
- Intel Pentium 4 2.4C GHz CPU;
- ASUS P4P800 mainboard on i865PE chipset;
- Corsair TwinX1024-4000PRO memory modules;
- 1024MB RAM, the memory worked in dual-channel mode in all tests due to the fact that we had two 512MB memory modules at our disposal;
- NVIDIA GeForce FX 5900 Ultra graphics card, Detonator driver version 45.23;
- Seagate Barracuda ATA IV HDD, 80GB;
- MS Windows XP Professional SP1.
The testing methodology remained the same in this case, that is why I suggest going over to the obtained results right away. I would just like to say that Performance Mode parameter was set to Turbo, and Memory Acceleration Mode – to Enabled. However, we saw throughout the test session that these parameters do not influence the maximum working frequency of Corsair TwinX1024-4000PRO in any way.
To tell the truth, I was shocked when I saw these results. It turns out that Corsair TwinX1024-4000PRO works much worse on i865PE based mainboards. I ran all the tests anew, however, the result didn’t change. Corsair TwinX1024-4000PRO failed to exceed the nominal working frequencies even when I replaced the ASUS mainboard with an ABIT IS7 and disabled Game Accelerator technology. So, it means that the mainboard has nothing to do with it. At the same time, DDR500 modules from OCZ, EL DDR PC-4000 Dual Channel, show absolutely identical overclockability in both: i875P and i865PE based systems. So, you should definitely keep in mind that Corsair TwinX1024-4000PRO works in i865PE based mainboards slower than in more expensive i875P based ones. And it is probably connected with those LED circuits laid out on the Corsair’s PCB, while i875P is capable of standing much higher load on its signal lines because it uses specially selected faster dies.
This way, we wouldn’t recommend using the new Corsair XMS ProSeries memory modules in systems with an i865PE based mainboard.