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Higher clock vs tighter timings

post #1 of 5
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Ok...So I was up virtually all night playing with memtest86...all in all, I have come up with a question that I am sure has been addressed...are you better off with a higher clock speed and loose timings, or a slightly lower clock with tight timings? right now I am running 3.15 gHz with load temps really low (not exceeding 38C!) and my timings are 4-4-4-12...with ram running at 350 mHz in 1:1 with FSB...I could raise FSB to 400, but would have to lower my timings to like 5-5-5-18...so, am I better off staying cool and tight with the 350, or going higher with less aggressive timings?
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post #2 of 5
Well when DDR2 dimms first came out I heard that only modules above 667MHz would begin to outperform DDR400 modules due to the high latencies of DDR2 and relatively low latencies of DDR.
    
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post #3 of 5
Thats a good question, I was wondering the same thing. Kinda similar situation with me, but im running DDR400 not DDR2. Anyone else might know the answer to this question?
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post #4 of 5
There is a slight advantage going with faster clocks over tighter timings. However, it is very slight and certain applications perform better on tighter timings. It also depends on how much faster vs how tight. You won't notice a huge impact of real world performance. However, 5-5-5-18 timings is pretty loose... I would say go with 4-4-4-12 and lower clocks. The best thing to do is running memory benchmarks and not just stability tests.
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post #5 of 5
allright, first off why cant your ram do 400fsb at 1:1 that should put it at ddr2 800 since right now its runnign at ddr2 700 or are you using different ram then whats in your system specs, so i dont know which sticks you have but the xms2 is all 44412 or 55512 so you should be gaurunteed 55512 at the 400 fsb and i assume you could go higher with it, is that the highest your cpu can do right now, those temps are really good did you try maybe a little more vcore

also im sure those ram can handle some vdimm so 2.2 shoudl be good to get higher then 400fsb

as far as timings and ram speed amd 64 cpus like tighter timings and you will get better performance out of ram running at stock speeds with really tight timings then ram running really lose timings but with intel atleast the p4's it was the other way around they didnt care much about timings and it was all clock speed, from what ive heard the conroes still like the higher speeds better but can gain a minimal performance boost from tighter timings

i would say get everything as fast as it can go then once your there try and tighten up the timngs a bit and run some benches
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