How much difference does the shader clock make on a 580?

[PhotoGuy]

Ok, I have a screen res of 2560 x 1440 and want a single card solution. So I am thinking of waiting a few days and spending another £50 on the 3gb version of the MSI GTX Lightning.

Now I've seen different views on 3mb of ram on 580s, apprantly the 256 mem chips they use in the 3mb versions has a higher latency.

But what difference does dropping the Shader Clock from 1747MHz on the 1.5gb to 1664MHz make?



MSI GeForce GTX 580 Lightning 1536MB GDDR5 PCI-Express Graphics Card
Core: 832MHz, Memory: 1536MB 4200MHz GDDR5, Stream Processors: 512, Shader Clock: 1747MHz, SLI Ready, PhysX/CUDA Enabled, 3 Years Warranty.


MSI GTX 580 Lightning Xtreme Edition 3072MB GDDR5 PCI-Express Graphics Card
Core: 832MHz, Memory: 3072MB 4200MHz GDDR5, Stream Processors: 512, Shader Clock: 1664MHz, SLI Ready, PhysX/CUDA Enabled, 3 Years Warranty.

 

[mattjd]

For your resolution you would want the 3gb version anyway

 

[PhotoGuy]

For your resolution you would want the 3gb version anyway

Sold!

 

[Scougar]

I would be very suprised if you couldn't tweak it up to 1747Mhz anyway. It's a non-issue if you need the memory. If you run out of memory (although 1.5GB is still a lot!), it will kill performance MUCH MUCH more than 80Mhz lost on the shader clock. 80mhz is nothing really to be honest.

 

[Surveyor]

I thought the core and the shader clocks were linked with the shader clock being double the core.

832 MHz core x 2 = 1664MHz shader clock

A shader clock of 1747MHz with a core clock of 832MHz does not compute.

 

[smit101]

I thought the core and the shader clocks were linked with the shader clock being double the core.

832 MHz core x 2 = 1664MHz shader clock

A shader clock of 1747MHz with a core clock of 832MHz does not compute.

Either a mis-print or they've unlinked the core and shader clocks which is easy enough to do with the right software.

 

[Surveyor]

The MSI website says nothing about the shader clock.

Reviews of the MSI N580GTX Lightning say 832MHz on the core, 1664 MHz on the shaders.

1747MHz on the shader clock would appear to be an error.