OC PCI Express Bus (up freq)

T

tempoct

Weaksauce
Joined
Sep 16, 2005
Messages
120
Hi,
How much performance gain I would get in the real world, says I up my PCI-x freq from 100MHz to 120MHz? I got only 10 points more on 3D Mark 05 :p (oppose to many which seems to get 200 more point).
Also the 3D Mark 05 result has dropped for some reason. No config change in the BIOS. Last night I got 2271/2261 points but this morning I got 2071/2061 points. Weird.

Here's my setup;
-E6300 @ 3.29GHz (1.35625v 7x470) Dual primes stable, tested to 15 Hrs (loaded max 56 core0 52 core1 on Scythe Ninja Rev B)
-Asus P5B Deluxe Wifi
-Corsair XMS2 6400C4 2GB (Promos @ 2.15v 5-5-5-18 DDR2-940, tested stable to DDR2-1000 with same timing)
-eVGA GeForce 6600 128MB (I know, I know. Don't wanna upgrade yet. Don't play high graphic game) on latest ForceWare v93.71.
-WD 500GB SE16
-Antec NeoHE 430
-NEC 7170A DVD-RW
-Dell 2405FPW connected via DVI @ 1920x1200
-Win XP SP2 latest patch
 
Welll the PCIe bus, ESPECIALLY with a 6600 lvl card, has no impact on overall speeds...

As for the point drop, i'm not too sure...
 
Overclocking the PCI and PCIe buses is pretty much just used for stability. If you are overclocking your processor and are unstable, sometimes its that your motherboard can't hold a frequency so you try changing it between 100-110mhz for the PCIe and locking it at 33mhz for PCI.

As for the Drop in your score, if you left your computer running overnight, I have found that my computer's performance suffers after being on for a long period of time (I'm talking weeks though, not just over night). However, sometimes if you were doing something intensive or left Google Desktop (I know from experience) running longer than a few days, It can really slow down your system. Try rebooting and running again with a fresh slate.
 
Thanks everyone.
OK, so I guess there's no benefit for me to up the PCIe clock then. My system is stable (tested @ 100MHz).
For score drop, I'm not sure either! XP is newly installed (just for testing since I'll move to Vista soon, been experimenting with Vista RTM on my A64 box). I did not leave it run overnight but from cold start (18c ambient temp). The high score I got when the machine has been running for a while.... (maybe need 'warm up' ;) )
What's the ballpark of GeForce 6600 score anyway?
 
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