Well, they easily run at ~780mhz cl4 or 936mhz cl5 at cpu fsb that I decided to use. I could overclock my cpu fsb further and these memories could handle that too but I decided to settle with a bit lower setting for extra safety (regarding CPU stability). At cl5 I know that they booted at 1000mhz but I didn't test them for long because it's usually more than max overclockability of my CPU.
Would it be worth replacing these for 1066mhz cl5 RAM sticks for 30$ more or is it not really worth the performance gain?
After all I think the difference between my previous 667mhz cl5 and my current 800mhz cl4 is probably bigger than between 800mhz and 1066mhz and I can't really feel that much of a difference. Also, I'm not sure if they would scale well unless they would work at 936mhz cl4 or ~1200mhz cl5 but I'm also not sure if my motherboard could handle that.
Now a pretty strange part: I downloaded 3dmark06 since it's better at showing real gaming performance and I get similar results no matter if everything is at stock settings or if everything is overclocked with memories either on cl4 or cl5. Overall 3dmark06 score is almost equal with my CPU and RAM at stock settings, despite giving a lower CPU score.
Basically after overclocking I'm getting a bit higher CPU score than I get at stock settings which is at around 4000, after overclocking my cpu fsb with RAM at cl4 I'm getting a bit above 4400 and with higher clocked RAM at cl5 it's almost 4500. Still, the difference is very small and sometimes the difference between 2 random 3dmark06 runs on the same setting is bigger than the difference I get after changing my ram settings.
I'm not sure which settings to keep.
edit: Okay, I summed up all of my test results and looked for the highest median result. Left it at cpu fsb @224 so my CPU clock is at 3250mhz and ram at a corresponding speed with x4 multiplier and cl5. Seems to give me best results, slightly better than when my ram is at cl4 and lower clock speeds.
Edited by szymon247 - 11/24/10 at 11:21am