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Crucial Ballistix DDR400 not clocking past DDR340

post #1 of 2
Thread Starter 
I just built a new computer: AMD Athlon64 3500+, X1900GT, DFI RDX200, Crucial Ballistix 512MB DDR400. For some reason im getting Bsod when I try to clock the memory past 170Mhz. Newegg states that its 2-2-2-6 @ 2.8v, any ideas? Here is all of the timing info (I relaxed the timings a little to see if it would help):

3-4-4-8 (Tcl, Trcd, Trp, Tras) 11 Trc, 12 Trfc, 2 Trrd, 3 Twr, 1 Twtr, 8 Trwt, Tref 100Mhz 15.6us, 1 Twcl, 1T Timing, Drive Strength Weak, Clock Speed 166Mhz. I also have the voltage set to 2.8v, any ideas?
post #2 of 2
Your TRC is to low.

Let's say 3-4-4-8 is A-B-C-D. Following taken from this guide:

"tRAS = 4th timing
Value Memory: CAS + tRCD + 3 or 4 = tRAS
Standard Memory: CAS + tRCD + 2 = tRAS
Extreme Memory: CAS + tRCD + 1.5 = tRAS
Flagship Memory: CAS + tRCD + 0.5 or 1 = tRAS

However, I'm able to run my Memory at any tRAS value between 0 and 5, including 0. But, for the sake of calculating tRC, I assume it's CAS + tRCD which would make it 5 for me. So, my tRC should be 7 (even though tRAS is 0), but it's on Auto, so it's actually 15.

Now you have your tRAS value, your tRC value is equal to TRP (3rd timing) + TRAS.
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