News AMD Shrank The Navi 31 Die In RX 7900 GRE, Smaller Than 7900 XT and XTX

[Admin]

AMD's new RX 7900 GRE is equipped with a physically smaller Navi 31 package compared to the RX 7900 XT and XTX. The PCB has also been re-designed featuring fewer memory slots.

AMD Shrank The Navi 31 Die In RX 7900 GRE, Smaller Than 7900 XT and XTX : Read more

 

[AgentBirdnest]

Title: "AMD Shrank The Navi 31 Die In RX 7900 GRE"

Article: "The physical size of the GPU die and MCDs remains the same, the only thing that became smaller is the GPU packaging."

The title is a lie. I'm annoyed.

 

[TechyInAZ]

Oops I forgot to delete the word die, when I was editing. Thanks for pointing that out!

 

[qwertymac93]

Oops I forgot to delete the word die, when I was editing. Thanks for pointing that out!

The sub-title blurb has the same problem...

 

[Alvar "Miles" Udell]

But, altering a GPU die like AMD has done with the RX 7900 GRE is very unusual, and takes a lot of money and time to pull off. We cannot be sure of AMD's exact reasons for making these expensive changes to Navi 31, but it would be very illogical for AMD to go through all this hassle for one SKU. So we should see this same die in other GPU models down the road, possibly in the RX 7800 series and mobile GPU equivalents.

AMD using a different GPU for a different model? Who would have thought...Oh wait, everyone...

 

[jackt]

I hope in a rx7600 xt or similar...

 

[usertests]

It matches a MLID leak in June, Navi 31 made to fit inside the Navi 32 package.

AMD Navi 32 "RDNA 3" GPU Package Pictured, Supports Navi 31 GPU Die With Six MCDs In Compact Form Factor

Brand new pictures of AMD's Navi 32 GPU package have been obtained by Moore's Law is Dead which holds a Navi 31 RDNA 3 GPU die.

wccftech.com

https://cdn.wccftech.com/wp-content/uploads/2023/06/AMD-Radeon-RX-7800-XT-Navi-32-GPU-Package-With-Navi-31-GPU-Die-_1.png

 

[systemBuilder_49]

I think this is no surprise - they are prohibited from putting their AI engine into chinese GPUs it's why the 7940h exists - it's a special version for China - the AI accelerator is completely eliminated. I'm sure the same would be true for the GRE version of the 7900.

 

[qwertymac93]

It's really very simple; most of the pins on a GPU package are for power and memory interfaces. The 7900 GRE has a lower power limit and has a much narrower memory interface. Of course you can make the package smaller when hundreds of pins are dark.

 

[PiranhaTech]

I hope this means prices will start lowering, as with TDP

 

[ET3D]

What's particularly curious is that AMD's RX 7900 GRE specifications page lists 54 billion transistors for the new chip. The RX 7900 XTX and RX 7900 XT page meanwhile list 58 billion transistors. It could just be a typo, but clearly there's more going on behind the scenes than might otherwise be immediately apparent.

I'm not sure why it's not immediately apparent. Perhaps a look at the Navi 31 spec page at TechPowerUp will help. The 58B transistor figure is made up from 45.4B GCD transistors and 2.05B transistors per MCD. With 6 MCDs, that's a total of 57.7B transistors (rounded up to 58B). With 4 MCDs, that's a total of 53.6B transistors.

 

[JarredWaltonGPU]

I'm not sure why it's not immediately apparent. Perhaps a look at the Navi 31 spec page at TechPowerUp will help. The 58B transistor figure is made up from 45.4B GCD transistors and 2.05B transistors per MCD. With 6 MCDs, that's a total of 57.7B transistors (rounded up to 58B). With 4 MCDs, that's a total of 53.6B transistors.

And yet the 7900 XT which has 5 MCDs still lists 58B and not 56B, which tosses out your argument.