Wrong shader count in gpu-z?

Hey guys, curious to know if anyone else is experiencing this same issue. I updated gpu-z to the newest version and it said in the revision history that it "Fixed shader count detection for Blackcomb (mobile AMD Cayman)" and now as opposed to gpu-z reading 1120, it reads 896. I'm wondering which version of gpu-z is correct, the 0.5.4 version or the 0.5.5 version

 

Sorry, I didn't mention that my card is a 6990m. The texture fillrate is also shown as being lower: 32gigtexels as compared to 40

 

I get the same thing, 896 unified shaders for the 6990M. Very interesting. It says my 6970M has only 768 shaders (v. 960 in the previous versions). One nice change -- it now remembers which video card was last viewed in multi card systems, so we don't always start with the Intel IGP and have to switch to the discrete card.

 

Hmm interesting indeed and also mildly alarming. I would be upset to find out that our 6990m's infact only have 896 shaders unlocked. Do you think that this oculd be the case?

 

If that were the case, the card would be exceptionally unstable and possibly not even operate at all. No need for undue panic.

 

Why would fewer shaders make it unstable?

I expect this comes down to definitions. AMD claims "1120 Stream Processing Units" in the 6990M. AMD Radeon? HD 6990M Graphics. GPU-Z may count them differently or the stream processing units may include items other than shaders. Surprised there hasn't been more discussion of this variance.

 

mm for instance both rivatuner and hwinfo32/64 show my 6970's having only 480 shaders. But definetly it's a software glitch.

i'll download the latest gpu-z and see what it shows for me

Edit: also for me wrong shaders count

 

HW64 shows 480 unified shaders for my 6970M too (and 560 for the 6990M). At least they're consistent derivations from the original count.

 

Fewer shaders wouldn't make it unstable per say, but shader counts of 896 and 768 on a Barts XTX chip would make it extremely unstable.

There are 80 shaders to each cluster of 4 texture units for a grand total of 14 SIMD engines in a full fledged 6990 chip. The chip will function with entire SIMD engines turned off which would result in shader counts that drop in multiples of 80. This is the difference between the 6970 and 6990 for example.

However the chip would not be stable and most likely not function with a few shaders turned off in a single SIMD engine which numbers like 896 and 768 would have required to happen. If those numbers were correct, then most likely you would not have a working computer in front of you.

I don't know why people have a hard time understanding that software like gpu-z and hwinfo go through periodic updates to update their database of gpu's and other components. Until those updates to the software is made, you will get report errors.

 

Thanks for the lesson in video card construction. But there appears to be more than simple transition oversight here. They tout the shader recount as a feature of the new v0.5.5 ("Fixed shader count detection for Blackcomb (mobile AMD Cayman)"). Sounds intentional, whatever the reasoning behind it. +Rep.

 

same for me

 

I understand that it is likely that gpu-z has it wrong. But I don't understand why they would go through the trouble of "correcting the shader count" if in fact, the shader count is wrong now when it appeared to be right before.

 

After reading this post my brian hurts. It always amazes me how little I actually know about my computer and its components.

Oh well at least you dont have to know how computer parts work to stick them inside your computer.

Edit: Oh +1 rep btw

 

It seems like only the red GPU-z is showing wrong shaders but the normal green GPU-z is showing the same as usual shader count.

Cheers.

Download TechPowerUp GPU-Z v0.5.5 w/ ASUS ROG Skin | techPowerUp
Showing wrong shader count apparently
This one must have gone ROGUE!

Download TechPowerUp GPU-Z v0.5.5 | techPowerUp
Showing the same old shader count as before.

Cheers.