HELP! Really odd results from overclocking, what d


Jan 18, 2002
First I want to apologize for posting this on 2 boards, I just didn't know where it fits best...

I would really appreciate any help and advice in this matter. My latest overclocking adventure didn't at all turn out the way I expected and I don't know why...

First let me point out that I am no elite OC'er, I use aircooling and I usually only mod mutiplier and FSB, not voltage or memory´so I am really bad at that. I want to learn more about this thoough so PLEASE explain what I have done wrong

Also I am not after maximum benchmarking results, I want optimized 3D performance for playing games.

Until recently my system looked like this:

AMD 1333@1432 (10x143FSB)
512 Mb PC2100 DDR CAS 3
Asus A7M266
Point of View Geforce 3 64Mb @ 230/500
Win 2K pro
Directx 8.1
Detonator 23.11 (I had 22.80 installed before 23.11 and didn't uninstall it before installing 23.11 if that matters..)

With this setup I managed to get 7239 in 3DMark2001

I also tried 145Mhz FSB but I only managed to get 6745 at best

I assumed some parts of my system (RAM?) didn't like the high FSB so I stuck with 143Mhz instead... The same thing happened when I tried to use CAS 2, that is I got worse performance than when using CAS 3. (As I said I am not good tweaking RAM..)

Of course I wanted better performance and as ASUS A7M266 does not support variable multiplier so I decided to but a new motherboard. All said and done, now my system looks like this (I formatted my HD and reinstalled win2k and all drivers):

AMD 1333@1529 (11x139FSB)
768 Mb PC2100 DDR CAS 3
IWILL XP333-R rev 2.1
Point of View Geforce 3 64Mb @ 220/500
Win 2K pro
Directx 8.1
Detonator 23.11

The first thing that surprised me was that I could not get FSB higher than 139Mhz without the system becoming unstable, and this was at x 10 clock. I thought this might be because of the new 256 Mb pc 2100 that I installed, I now have 3 x 256 Mb pc2100 and all are of different brands.... I know how incredibly bad this is but I just couldn't afford a better solution.

However I got a lot happier when I discovered that I couls change the clock to x 11 without any problems (as I said I don't know when and how much I should increase voltage and so on so I didn't try that.).

I started off running SiSoft Sandra 2001 and my new setup got much better results in the CPU and Multimedia benchmarks, the memory benchmarks only showed a slight improvement.

I was really excited over these results and started up 3DMark2001 I got suspicious when I watched the demos run cause I thought they didn't really run very smooth. I got very disappointed to see that the final result was 5292!!! This result is actually worse than before I overclocked my old system at all (FSB and Geforce3).

Ok, now I have a ton of questions!

1. Is it better to decrease FSB and try getting lower CAS?
2. How is it possible to get higher results in Sandra for all parts, and so incredibly bad results in 3DMark??
3. My IWILL XP333-R makes it possible to use PCI dividers from 1/3 - 1/6, could I increase FSB by using these? Will they make my RAM more stable or just PCI?
4. Could I increase the clock even higher than 11 x by increasing voltage? (It wont post at 11.5 now) If so, how much should I increase it?
5. Is it likely that it is my RAM that is limiting FSB and causeing the crappy benchmark results?
6. Are there faster drivers than Detonator 23.11 for a GeForce 3?
7. Would it be more reliable to measure 3D performace in fps in i e Q3?
8. IWILL XP333-R rev 2.1 offers a TON of possible settings and tweaks and I just don't know how to make best use of them...

And as I said, I need to use my complete system, I know I could get better benchmark results by just using one of my 256 RAM sticks but I want to optimize the system I actually use, and I need a lot of RAM....

I know this is a really long post but if you can help me I will be VERY grateful, there is a ton of general guides out there but I need advice that works....


Jul 18, 2001
Some answers:
3. The PCI divider only works for PCI bus speed, the RAM will probably run at the same speed as the FSB.
4. If you increase your VCore voltage to 1.8/1.85V you might be able to run your CPU at higher speeds and higher multiplier settings, but be aware that this also increases the heat produced by the CPU.
5. Yes, low quality RAM can make FSB overclocking very difficult.
6. Maybe the old 21.83 drivers is faster, the 23.11 are still beta.
7. Read this article about 3d benchmarking: <A HREF="" target="_new"></A>.

Hope this can help a little.

My case has so many fans that it hovers above the ground :eek: .

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