What does the shader clock do???

I was using rivatuner and when i tried overclocking the core clock it does not work but when i overclock the shader clock it works.

There was about 5-8 fps increase in Halo 2. Thats large.

What does the shaderclock really do?? I overclocked it to 1299mhz from 800mhz. will that have bad effects?

 

Does anybody know?????

 

The shaders can be overclocked higher than Core and Memory. Shaders yields best performance in games like Crysis, Oblivion, Lost Planet. I.e shader intensive games that is. Overclocking shaders yields a nice boost in performance. I overclocked when I had my M1730 with 8700m GT in SLI the shaders to 300 MHz above stock.

 

So it is safe to overclock it to max?

Also my core clock temp was at 75 degrees celcius, that is still a safe temp, right?

 

75 is still safe, but it is kind of pushing it, I would not recommend running at temperature above 80 C. Even though the card can theoretically withstand temperature up to 120 C and a little higher before it starts to melt. however, anything above 80 makes me uncomfortable,

 

Use ATI tool and run it side to side with Rivatuner and check for artifacts and temps of course. Artifact free, well up the shaders even more. Forget about the 10MHz increments like people say when you get artifacts, whoop it up to 50MHz increment instead and check for artifacts. Run ATI tool for 10 minutes, artifact free well higher your clocks even further

Unless you got all day to test 10MHz increments which I don´t.

 

interesting..i never tried increasing Shader clock.. ..will try it for NFS most wanted

 

You can try different things overclocking your card. Some games will benefit more from a fast core clock than a faster shader clock, and vice versa. Overclocking the core will drive up your temperatures the fastest. Also don't forget about the memory. In my experience, most performance gains from overclocking that.

 

Sets the clock speed of the individual shader processors. Hence the name.

Overclocking is never safe, no.
But it's no more risky to overclock shader clock than any other part of the GPU.

Not quite. It can withstand temps up to 120C before the driver starts to warn you about overheating.
That doesn't mean the card melts, or takes any physical damage.

(Of course, if it's in a laptop, everything is crammed so tightly together that high temps might affect other components than the GPU, so you might want to keep an eye open there)

In any case, your system will get unstable and crash long before it takes any physical damage. So as long as you lower speeds again once it starts getting unstable, you *should* be fine. (but of course, you can never be 100% sure when overclocking )

 

My c90s always run at 95-110C under load. CPU stays at 68, and it's about 2cm between them.

The shader clock is the link between the shaders (since they are unified in DX10). Normally it's linked with the core clock, so when you overclock the core, the shader gets overclocked though. You can disable the link with riva tuner for exemple.

My card runs at 475/950, the core can't withstand higher than 500 but I can OC the shader to 1350 without any problems.