How to, Ram Settings

[Jim123]

Hi, I've seen posts here about setting the ran in the BIOS (2-2-2-2-1), I'm not sure what it means or how to do it. It's time I do,
any suggestions.

What I got:

Asus A7N8X Deluxe, rev.2.00, BIOS 1007, nForce2 drivers 3.13, FSB set at 333MHz. (just flashed BIOS from 1003 to 1007)
Athlon XP 2500+ Barton 333FSB @ 1829MHz (set at 166 in BIOS) (not overclocked)
3 Sticks of-Corsair XMS PC2700 DDR 333MHz CAS2 CMX256A-2700C2 C2 256MB, (768MB total), Dual Channel, (BIOS set AUTO)

Any info missing?

What would be a good place to start in pushing this.

 

[myocardia]

Your ram should already be set at 2-2-2-5. I'm not 100% sure, but I'm pretty sure that those are the SPD (manufacturer recomm.) settings for that ram, so unless you've changed them, they should be at that or close to it.

 

[Jim123]

Thank you, I have it set in the BIOS as auto. Are those settings pre set?

Again, Thank you

 

[myocardia]

Auto and "By SPD" are the same thing, it just depends on your motherboard. So your mobo is running the ram at what Corsair says it will run at, in other words. If you want to find out, just look in the bios. Even when running it on auto, it should display the ram timings directly under where you can change it to something other than auto.

 

[Jim123]

Thank you, I can set it to AUTO, or SPD, or Manul, Is there any difference between AUTO and SPD?

 

[jjet67]

I had the same question and I found this information from amdmb.com


Decoding Memory Timings: Example Corsair XMS2700 @ 2-3-3-6-1T
------------------------------------------------------------------------------
CAS Latency: 2
RAS Precharge (tRP): 3
RAS-to-CAS Delay (tRCD): 3
Bank cycle time (or tRAS): 6
Command Rate: 1T


To adjust timing, you need to consult with manufacturer's spec as far as I know.
Hope this helps.

JJET

 

[myocardia]

Exactly, because the memory timings won't go any lower than the manufacturer's preset settings, without huge voltage increases. Besides, there's a 1% or less performance difference between 2-2-2-x and 2-3-3-x, anyway. BTW, with any nForce2 board, 2-3-3-11 is faster than 2-3-3-6. It's because of the way the chipset is designed.

 

[edmundoab]

I put mine at 2-2-2-11
and the benchmarks prove to make a slight difference