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Please help me confirm proper timing settings! - Page 2

post #11 of 18
Thread Starter 
Awesome, thanks.

I went ahead and jumped in to the timings given by the manufacturer (4-4-4-12), and the test went three loops without any errors, so I guess I'll start from this point.

One thing I noticed, why does cpu-z say the frequency of the ram is 400mhz? Is this because of the CMD setting? (2T = 400mhz, 1T = 800mhz), or am I way off in my thinking?
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My System
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Core2Duo E6600 Asus P5N-E SLI 8800GTX 2x1GB Corsair XMS2-6400 (4-4-4-12) 
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post #12 of 18
DDR and DDR2 memory are Double-Data-Rate, so the effective speed is double the operating speed. Stock DDR memory operates at 200MHz, effective speed is 400Mhz. Which is why they're often quoted at running at DDR400 (or DDR2 667 - 333MHz).

So, when stating frequency, its best to say the operating speed, rather than the effective speed. If you wish to state effective speed, say 'DDR2 XXX'.
post #13 of 18
Thread Starter 
Apparently my ram doesn't like 1T. Got 7% into the first run through the test and then memtest86 just froze up. No errors and it wouldn't respond to anything. Weird.
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Core2Duo E6600 Asus P5N-E SLI 8800GTX 2x1GB Corsair XMS2-6400 (4-4-4-12) 
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2x Seagate 500GB SATA Acer 22" Widescreen LCD 650w BFG Aspire X-Discovery 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core2Duo E6600 Asus P5N-E SLI 8800GTX 2x1GB Corsair XMS2-6400 (4-4-4-12) 
Hard DriveMonitorPowerCase
2x Seagate 500GB SATA Acer 22" Widescreen LCD 650w BFG Aspire X-Discovery 
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post #14 of 18
Thats not good. It should run at 1T, no probs, at 400MHz.
post #15 of 18
Thread Starter 
Weird. Maybe it was just an isolated incident. I'm trying it again and it's at 47% through the first run (better than freezing at 7%!), so we'll see what happens.

One more stupid question (and hopefully one of the last!). You said that tRAS should be equal to about the 2nd and 3rd timings added together (which are both 4?), so shouldn't it be closer to 10 than 14, or am I missing something?


Edit: Froze up at 91% again. Hmm. :\\
My System
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Core2Duo E6600 Asus P5N-E SLI 8800GTX 2x1GB Corsair XMS2-6400 (4-4-4-12) 
Hard DriveMonitorPowerCase
2x Seagate 500GB SATA Acer 22" Widescreen LCD 650w BFG Aspire X-Discovery 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core2Duo E6600 Asus P5N-E SLI 8800GTX 2x1GB Corsair XMS2-6400 (4-4-4-12) 
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2x Seagate 500GB SATA Acer 22" Widescreen LCD 650w BFG Aspire X-Discovery 
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post #16 of 18
well, they were 5, which is why I said 14. Set it at 11 or 12. With your memory, tRAS my not be able to actually run at 2nd + 3rd. Start loose, then tighten. Dont start overtightened, overwise you dont know whats wrong with the memory.
post #17 of 18
im about in this same situation as i have the same mobo and similar ram from corsair.

I have a E6400 which i managed to overclock to a stable 2.8ghz(I can get it higher but need better cpu/case cooling for longterm use).

i was pretty confused by my asus board and all its memory settings.. but this thread has cleared just about all of that up

now heres what im worried about. ive been reading how intel systems work well with a 1:1 ratio. ... my cpu is at 8 x 350 = 2.8ghz... while the memory's fsb(memorys fsb.. is that correct?) is at 266.

now ive yet to even touch the ram from its "auto" settings... so im sure it can go higher... but should i try to get the ram closer to the cpu's fsb... or should i step the cpu down a bit. yes im obviously going to have to run benchmarks to find exactly whats best... but whats the rule of thumb in my situation with similar hardware?

all i know is.. my PC is a heck of a lot faster now at 2.8 then when it was at 2.13.
post #18 of 18
your fsb is at 350 so times 2 thats ddr2 700
you have ddr2 800 so all you need to do is tighten some timings and you should be good
i dont know what ram you have but if its the same as the first guy
start at what the ram is rated at it should say on the ram module
im guessing
tcl:4
trcd:4
trp:4
tras:15
command per clock:should be 1 but i have never worked with a core2 so i dont know how stable it would be

once you set that dont boot windows go stright to memtest cuz even if the ram is a lil unstable it will crash windows and could currupt the harddrive
happend to me last night...

like the other guy said run test 5 a few times it will take forever since you have 2GB
if it run through without errors go backinto the bios and change the tras down 1 if that passes change the trp down 1 then the trcd i wouldent change the tcl cuz that is a tight timing for ddr700 already

and make sure the voltage for the ram is correct
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