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CPU/NB vs RAM speed when timings are kept the same

post #1 of 5
Thread Starter 
I haven't been doing any benches yet of the various setups I've tried, just stability tests with prime95.

In general, if the RAM timings are kept the same, which is better

Higher CPU/NB and lower RAM speed

or the opposite.


For example

3000 CPU/NB and 1600 RAM

2800 and 1600 worked for the 15min I checked it, but for now, I'm prime95ing right now

210x17.5=3675
210x13=2730
210x8=1680 RAM
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post #2 of 5
Quote:
Originally Posted by Mit Namso View Post
I haven't been doing any benches yet of the various setups I've tried, just stability tests with prime95.

In general, if the RAM timings are kept the same, which is better

Higher CPU/NB and lower RAM speed

or the opposite.


For example

3000 CPU/NB and 1600 RAM

2800 and 1600 worked for the 15min I checked it, but for now, I'm prime95ing right now

210x17.5=3675
210x13=2730
210x8=1680 RAM
I just finished my set of ECO's. (same as yours) They OC nicely! You should be able to lower the timings a bit (6-8-6) and still run at 1672MHz).

You'll find raising the CPU/NB Freq as high as possible while keeping HT Link as close as possible to 2000MHz (+/- 100MHz) will work the best.

Have you tried raising the ref clock higher with lower multiplier? If you haven't seen this you may find it interesting http://www.overclock.net/amd-general...ing-guide.html
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post #3 of 5
Thread Starter 
At

210x17=3570 CPU
210x14=2730 CPU/NB
210x9=1890HT
210x8=1680 RAM @ 1.48125V

6-8-6-20-28-1T didn't work at above volts, so I tried 6-8-6-24-40, the 24-40 is on auto, no post, I don't know how high to try with the volts, I see you have 1.6V, is that safe?

I should try stock everything else, but still unlocked to an x4, and see if the 6-8-6 works then.

And why 6-8-6, also there are about +12 numbers in the BIOS under DRAM timing, I just pulled the current 20-28 out of the air, and it worked, but 20-24 didn't at those volts.
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post #4 of 5
Max voltage is 1.65v (1.58-1.6v should get you there in most cases) but make sure you have enough cooling in your case. Not as some others do with very little exhaust and everything turned down speed wise to keep it silent.

It may also require a slight rise in Vcore and CPU/NB as well, +.003125v Vcore and +.02v increase on CPU/NB Voltage on mine to make it stable again when lowering from 7-8-7. Maybe if that doesn't do it you may have to change to 2T as this will help stabilize it with a slight decrease in performance.
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post #5 of 5
You may have to change to 2T indeed, though most ECOs will work just fine at 2T, I know a lot of users of the equivalent Ripjaws memory have had to change to 2T to overclock as well. If you haven't tried at 1.6V yet, it's perfectly safe. I've been using 1.6V for 10 months on my first 2x2GB kit and 8-9 on my second 2x2GB kit which I added later.
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