[Help!] With Overclocking 8500GT

Page 2 - Seeking answers? Join the Tom's Hardware community: where nearly two million members share solutions and discuss the latest tech.
So what i should do right now is just overclock the Core and Shader, leave the Memory Clock at 333Mhz. Then later on go onto Ntune and clock the Memory from there?
 

Yeah. If that doesn't work, do it the other way around. I'm looking for ways to bypass the limit atm.
 

Try this:

http://www.vaguesoft.com/users/dwood/blog/tutorials/rivatuner/

Under the Power User. Follow the steps carefully.
 

Not very well but here it goes...

Higher core clock helps in textures and stuff.

Higher memory clock increases bandwidth.

Higher shader clock helps in...well shadows. SM 3.0 stuff.

I'm not entirely sure that I am correct, but that's the gist of it.
 
Haha okay. Well now i can control the Memory Clock with Ntune and the Shader with Core clock with the Riva tuner now. So basicly all i do right now is just overclock as much as i want until theres a problem i go back to where it was at best?
 

Yes. Use ATI tools to scan for artifacts. Just don't use it's OCing feature.

I would start out with core clock, then shader clock, finally memory clock.
 
Yeah the ATI tools is getting me around 178 FPS, and so far ive made the Core at 600Mhz, Shader 1200Mhz, Memory 550Mhz. And its doing pretty well.
 

Hit view 3d window and watch your temps climb up. If you can watch the window for 2min (my guess) without freezing/ locking up, the clocks are fine.

If you want to be cautious, play some games or use 3dmark and leave it on loop.
 
I dont think my GPU is going so goood right now. The screen blinks for a second and comes out a message at the bottom left saying the Graphics Driver has stoped working and has been recovered so i set it back to 500Mhz and 333mhz. Do i save it at the point below of where it would stop working?
 

You can say that.

Test it out in some games or 3dmark. If it freezes/artifacts lower the clocks.

EDIT: If an OC fails, restart your PC. And don't hit save settings on startup.
 
Well now i get what you ment when you said to clock one by one. Clocking them at the same time will make you unsure which is the one that was the problem. ive clocked all of them the same time and while watching 3D Mark my Screen Froze. So now im going core from 570 and going up 10Mhz per time. When it freezes i would go back to when it didn't crash and call it stable point.

Example:
570 clock to 580(no problem) Clock to 590 (no problem) clock to 600(freeze) So then i would restart computer and save the Core clock as 590(when it didnt freeze) then move onto Shader clock and Memory etc.

Is that a good plan?
 

Excellent! I'm glad you're understanding all the procedures here. :bounce:

So 590MHz is the highest? Not bad, considering there's no fan.

EDIT:Nice avatar btw
 
Amazing what Flash can do lol.

Actually, 575 is the max stable because when i tried going onto 580 and apply then ok it goes back down to 575. Probably because i need to also increase the shader in order to futher out the Core.
 

There is one more way to increase your clock speed. It may not work with all vidcards, and it has a potential of screwing up the SATA ports.

It's called the PCIe frequency. Default it 100MHz. Increasing it will increase CPU speeds very slightly and increase bandwidth of the PCIe. Setting it too high will cause issue with SATA ports (the thing the HD is connected to).

If you want to risk it, set PCIe frequency to 115MHz and perhaps that'll help your OC more.
 
So Far i found out that, each 10 Shader Mhz is needed to clock up 5Mhz Core. That is the reason why my Driver stoped working because i brought the Shader up to 200 without the Core.
 

That's probably why you start with core first.

I may have scared you too much, but 115MHz is considered safe.