AMD Shows Off Dual-GPU Fiji Card At PC Gaming Show
by Ryan Smith on June 17, 2015 8:00 AM EST
Briefly announced and discussed during AMD’s 2015 GPU product presentation yesterday morning was AMD’s forthcoming dual Fiji video card. The near-obligatory counterpart to the just-announced Radeon R9 Fury X, the unnamed dual-GPU card will be taking things one step further with a pair of Fiji GPUs on a single card.
Meanwhile as part of yesterday evening’s AMD-sponsored PC Gaming Show, CEO Dr. Lisa Su took the stage for a few minutes to show off AMD’s recently announced Fury products. And at the end this included the first public showcase of the still in development dual-GPU card.
There’s not too much to say right now since we don’t know its specifications, but of course for the moment AMD is focusing on size. With 4GB of VRAM for each GPU on-package via HBM technology, AMD has been able to design a dual-GPU card that’s shorter and simpler than their previous dual-GPU cards like the R9 295X2 and HD 7990, saving space that would have otherwise been occupied by GDDR5 memory modules and the associated VRMs.
Meanwhile on the card we can see that it uses a PLX 8747 to provide PCIe switching between the two GPUs and the shared PCIe bus. And on the power delivery side the card uses a pair of 8-pin PCIe power sockets. At this time no further details are being released, so we’ll have to see what AMD is up to later on once they’re ready to reveal more about the video card.
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Mikemk - Wednesday, June 17, 2015 - link
The button between your left shift and tab will allow you to type normally.Black Obsidian - Wednesday, June 17, 2015 - link
Also, power requirements for HBM are significantly lower than with GDDR5. So less surface area for cooling, but less heat that needs to be dissipated, too.extide - Wednesday, June 17, 2015 - link
The GPU is fully in contact with the heatsinking device just like it always has -- the ram chips do not cover up the gpu so this is not an issue.extide - Wednesday, June 17, 2015 - link
I see you're talking about the ram dies itself -- well ram doesnt get that hot anyways and this ram is clocked lower and runs on lower voltages so less heat so again, its not an issue.FlushedBubblyJock - Tuesday, June 23, 2015 - link
not an issue IS SITTING RIGHT NEXT TO THE GPU CORE TOP BLASTING IT'S HEAT RIGHT NEXT TO IT.Other DDR5 is off die and aoff substrate and off in the wind of the fan off on another part of the card...
SO YOU'RE STATEMENT IS BAKED.
goldstone77 - Thursday, June 18, 2015 - link
HMB creates less heat though.FlushedBubblyJock - Tuesday, June 23, 2015 - link
But it creates it heat right next to the gpu core mm's away slamming the gpuUnlike DDR5 which is miles away from the gpu core in comparison
HBM is smoking the gpu core up as it sits right on it breathing down it's neck on all sides
Clauzii - Tuesday, June 30, 2015 - link
It's the GPU that heats up the HBMs, if anything. But the cooling solution nulifies any heat-problems overall.zepi - Wednesday, June 17, 2015 - link
It would be interesting to see dual-gpu on a single interposer with some way increased bandwidth between them allowing DMA between memories etc.This should allow way better xfire than pci-e bridging, and i'd guess especially dual-screen VR could benefit enormously.
Or maybe even CPU & GPU & shared memory on same interposer. True HSA, not the pci-e or ddr3 starved abominations we have now.
And cooling with water.
JMC2000 - Wednesday, June 17, 2015 - link
They would have to use linked interposers, if the GPUs don't become extremely small. But, it would still need a PCI-e bridge, unless AMD was to go back to the X1900 way of Crossfire with a 'master' and 'slave' GPU.