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Which is better, 132FSB 3:4 timings or 133FSB 1:1 timings?

B

bocamojo

Senior member
Trying to play around with the DDR and FSB settings on my P4 1.6A Northwood rig... Seems like the system is faster and more stable at 132 FSB with 3:4 timings, than 133 with 1:1. What's the deal with the 3:4 timings? Do they offer an advantage, either with speed or stability? Would appreciate your feedback on this question. Thanks.
 
With the 3:4 setting, you are running the FSB at 132MHz and the RAM at 166MHz.

The Pentium 4 always performs better the more RAM bandwidth you give it.
 
Andy,
Thanx for the response! That helps a lot. I did notice quite an improvement when I switched from 133/1:1 to 132 / 3:4... But just wasn't sure why. So, I guess that means that my Crucial DDR2100 stick is really quite capable after all! That's great news!
 
Try playing around with your memory latency/timings...it may be worth running 1:1 if it enables you to hit max with those settings.
 
exp,
My DDR timings are set at 2:2:2:7.... I tried to push my FSB earlier, but I couldn't post higher than 142, and anything above 138 was flaky at best. In fact, my CD-RW couldn't function properly until I brought it back down to below 138. I decided it wasn't worth it to push past 133, to make sure all my devices function properly. So, I figured it was between 133 1:1 or 132 3:4.
 
From the looks of the PCMark2002 results, you can definitely see the memory increase with the 3:4 setting.

My PCMark2002 scores for my P4 1.6A @2.13GHz, 132FSB 3:4, 2:2:2:7 DDR timings:

CPU Score: 5211
Mem Score: 5797
HDD Score: 716
 
my sandra scores changed drastically between:

133 FSB with 1:1 ratio and 2:2:2:5 timings (about 5050),

and

133 FSB with 4:5 ratio and 2.5:3:3:6 timings (about 5450)

Guess which I stuck with!!

I am aiming for stability, as this computer runs all of my game servers for my LAN.
So I use prime95, 3DMark2001 and Sandra to test stability. If Prime95 runs for a day or two,
then I am happy.
 
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