darklife41
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- May 18, 2006
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I edited this post rather than post again. After comparing the numbers more closely, I'll stick with my earlier claim that there is no payback for using DDR2-667 nor DDR2-800 RAM with the 805 overclock. Of course if you intend to use the memory later with another CPU, there are definite advantages.
I received my Crucial Ballistix DDR2-667 today. The timings are the tightest I could find, @ 3-3-3-12 (3). Although this memory does not come up on the Crucial Memory Advisor for the Asus P5WD2 Premium nor the P5WD2-E Premium, it works quite well on both.
Of course I couldn't wait to get it in the water cooled system and see how the numbers compared with Corsair Value Select DDR2-533 and Crucial Ballistix DDR2-800. We ran all benchmarks @ 4.0GHz, since we've already proven that the numbers will increase or decrease proportionally with the bus rate. We used the old results generated by the Corsair Value Select DDR2-533 and the Crucial DDR2-800. We ran the benchmarks with 2.15v on the memory (Crucial Ballistix is warrantied up to 2.2v.) The voltage may not be necessary, but this is as far as I've gotten.
I was able to tighten the timings to 3-3-3-8(3) @ 667MHz in BIOS (Asus chooses a 3:5 divider to run 667MHz according to CPUZ). The results amazed me, and I think they will most of you as well.
And for those who wanted to know, I ran the memory at 800MHz with 4-3-3-12(3) timings. Asus uses a 1:2 divider for 800MHz.
Basically, the numbers show that the 533 slightly out-performs even 800 in some tests, and is slightly behind the 667 and 800 in other tests. However, not one of the test results shows a drastic advantage to one memory over another. Only 1 result showed a 12% advantage, where most were fractions of fractions. Seeing is believing?
Scroll to the bottom of the page for the memory comparisons link. Best of luck with your projects. 🙂
http://ultramaxcc.com.au/intro.htm
I received my Crucial Ballistix DDR2-667 today. The timings are the tightest I could find, @ 3-3-3-12 (3). Although this memory does not come up on the Crucial Memory Advisor for the Asus P5WD2 Premium nor the P5WD2-E Premium, it works quite well on both.
Of course I couldn't wait to get it in the water cooled system and see how the numbers compared with Corsair Value Select DDR2-533 and Crucial Ballistix DDR2-800. We ran all benchmarks @ 4.0GHz, since we've already proven that the numbers will increase or decrease proportionally with the bus rate. We used the old results generated by the Corsair Value Select DDR2-533 and the Crucial DDR2-800. We ran the benchmarks with 2.15v on the memory (Crucial Ballistix is warrantied up to 2.2v.) The voltage may not be necessary, but this is as far as I've gotten.
I was able to tighten the timings to 3-3-3-8(3) @ 667MHz in BIOS (Asus chooses a 3:5 divider to run 667MHz according to CPUZ). The results amazed me, and I think they will most of you as well.
And for those who wanted to know, I ran the memory at 800MHz with 4-3-3-12(3) timings. Asus uses a 1:2 divider for 800MHz.
Basically, the numbers show that the 533 slightly out-performs even 800 in some tests, and is slightly behind the 667 and 800 in other tests. However, not one of the test results shows a drastic advantage to one memory over another. Only 1 result showed a 12% advantage, where most were fractions of fractions. Seeing is believing?
Scroll to the bottom of the page for the memory comparisons link. Best of luck with your projects. 🙂
http://ultramaxcc.com.au/intro.htm
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