7970 Die Size

[The Von Matrices]

I stumbled across something interesting today. I looked at GPU-Z, and it has the 7970 listed at 365mm^2

However, AMD's recent slide for the R9 290X lists the 7970 GHz edition as 352mm^2:

Which is correct? Did the die size of Tahiti change due to a revision?

One thing to also mention is that the slide calls the 7970 GHz edition memory bandwidth as 264GB/s, which is obviously wrong for the GHz edition at 6GHz memory bus. The rest of the slide does correspond to the GHz edition parameters, as compared to the GPU-Z screenshot.

 

[claylomax]

From Anandtech:

"At 438mm2 Hawaii is AMD’s biggest GPU yet, and despite AMD’s improvements in area efficiency Hawaii is still 73mm2 (20%) larger than Tahiti"


438mm2 - 73mm2 = 365mm2

 

[Xzibit]

Some sites measure it on there own and you get a discrepancy.

Its always been 352mm2 according to AMD

12/22/2011 - AMD Launches World’s Fastest Single-GPU Graphics Card – the AMD Radeon™ HD 7970
AMD Radeon™ HD 7970 Series GPU has been calculated at 3.789 TFLOPs of compute power with a die size of 352mm2

*Darn that fine print gets you every time.

 

[The Von Matrices]

Some sites measure it on there own and you get a discrepancy.

Its always been 352mm2 according to AMD



*Darn that fine print gets you every time.

Wow, I didn't know that. Nice job scouring the fine print. I've seen 365mm^2 so many times on the internet that I assumed it was the actual value; it probably all came from one inaccurate measurement. I guess GPU-Z and Anandtech are wrong. Thanks for the post.

 

[W1zzard]

Thanks! Already fixed in next GPU-Z release.

 

[claylomax]

Thanks! Already fixed in next GPU-Z release.

Indeed. Cheers.