Nvidia Core-Shader OC Question

A question for all the Nvidia overclocking gurus out there: would I see better performance keeping my GPU's core and shader clocks at a 1:2 ratio, or will I see benefits pushing the shaders higher?
As you can see from my sig, I used to run 625/1425, but I'm at 625/1250 right now because of my curiousity.

 

Core/Shader ratios are typically 2:5 and I would probably keep it that way.

 

I think it's different depending on what series GPU you have - the 8 and early 9 series have a 1:2 ratio, while the later 9 and 100/200 series have a 2:5 ratio, and the 300 series seems to have a 1:2.2 ratio.

 

Read this Suigi:

Guru3D.com Forums - View Single Post - Shader Clock Overclocking Tutorial

 

Overclocking the shader will not change the performance much.Focus more on core,if you want more performance.

 

The shader will increase 3DMark06, but little else.

 

i have the following clocks: 600/1400/450. if i lower the shader clock, would it affect performance?

 

the only time you will probably see an increase in performance from boosting shader clocks are in games/apps that are super heavy on shader rendering such as crysis. But from my own experience overclocking my 130M GT, its a negligible difference in FPS due to the fact that the increase wouldn't justify the extra 2-3 degrees C.

btw. my stock card is 2:5 (600/500/1500)

 

decreasing the shader will give 2-3 degrees off? i have it at 1400. if i decrease it to say 1250, i get the same performance at lower temp.?

also, how much do the clocks play a role in the temp? isnt the main reason for a higher temp is higher voltage?

 

im not sure if lowering the clock speeds will yield lower temps b/c i have never tried it but it does make logical sense. however im positive that you will lose performance.

raising the default clock speed of your gfx card will raise temps even w/o upping the voltage. in essence, you are forcing the card to run faster than it was designed to and thereby completing more cycles than before. increasing the voltage would only allow you to reach higher OC's due to the card needing more juice to get the clock speeds higher.

 

higher clock speeds and increased voltage = more heat.

Powermizer is based on this principle: lower clock speeds and reduce voltage intake = reduce heat.

 

The reference clock is simply a speed set by yields/power budget and based on averages.

Some chips are better than others. My chip for instance could overclock past reference speed yet still use less power than your chip at stock.

This is especially true on the current 40nm chips.