ddr 400 showing up as ddr 333?

R

rusty

Limp Gawd
Joined
Nov 9, 2002
Messages
380
i have 2 sticks of corsair xms pc3200 ddr 400 256mb in my nf7-s, and upon booting it says "memory frequency for: DDR 333....dual channel memory enabled" memory timing is set to "optimal", nothing has been changed, OC'd. any ideas?

2500 barton
abit nf7-s
2x256 corsair xms pc3200
 
Change it in the bios. If optimal it'll be set to the 'safest/fastest' possible. Set the DDR speed to 400.

-J.
 
Your CPU has a FSB of 166MHz, so in a 1:1 CPU/RAM ratio, the RAM will also run at 166MHz. That's what it's supposed to do. Setting a 5:6 ratio to run the RAM at 200MHz will not help performance at all.
 
Don't change it. Async + Athlon XP mobos == crap.

It's best to leave it at 1:1 for best performance.
 
I agree with him. Staying at 1:1 or as close to it is almost always better.
 
rusty said:
i have 2 sticks of corsair xms pc3200 ddr 400 256mb in my nf7-s, and upon booting it says "memory frequency for: DDR 333....dual channel memory enabled" memory timing is set to "optimal", nothing has been changed, OC'd. any ideas?

2500 barton
abit nf7-s
2x256 corsair xms pc3200
Click to expand...
When I had the NF7-S V2 and a 2600 Barton, I had used Corsair XMS 3200LL memory (which was rated at 2-3-2-6 timings). But with the timing set to "optimal", it (strangely) used 2-3-2-5 timings, which contributed to my AMD system's instability. (The XMS 3200LL now resides in my main Intel-powered rig.)

And running memory asynchrounously with the FSB, even if you're running PC3200 memory at 200MHz on a 166MHz FSB CPU, will not improve performance at all whatsoever - and may worsen the overall system performance in some way, either in the drastically increased CPU utilization or (in some cases) a slowdown in the overall system performance.
 
E4g1e said:
When I had the NF7-S V2 and a 2600 Barton, I had used Corsair XMS 3200LL memory (which was rated at 2-3-2-6 timings). But with the timing set to "optimal", it (strangely) used 2-3-2-5 timings, which contributed to my AMD system's instability. (The XMS 3200LL now resides in my main Intel-powered rig.)

And running memory asynchrounously with the FSB, even if you're running PC3200 memory at 200MHz on a 166MHz FSB CPU, will not improve performance at all whatsoever - and may worsen the overall system performance in some way, either in the drastically increased CPU utilization or (in some cases) a slowdown in the overall system performance.
Click to expand...

That's the situation I'm currently in.
I have DDR333 (which is underclocked to DDR320) matched up with my 800 MHz FSB (200 MHz quad-pumped) P4 490 HT (P4 2.6 Northy-C) and there is definite lag there. UNfortunately, trying to run the RAM @ DDR400 won't work (timings are severely screwy), so I'm gonna have to bite teh bullet and get some genuine DDR400 or better to replace it (the RAM originally came from a matchup with a P4 480 (P4 2.4 GHz Northy-B)).

On a separate subject:

is there any program that can determine the best performance timing for the memory in a system? As far as I know, SANDRA does *not* have that capability.
 
You must log in or register to reply here.
Back
Top