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PlayStation 6 to utilize AMD's 3D stacked chips; AMD UDNA Flagship GPU revived for 2026, Zen 6 Halo with 3D stacking technology, and Zen 6 all on TSMC

My guess would be that the GPU in the PS6 is going to be three device layers, each one being a newer revision of the PS5 Pro GPU and clocked at whatever allows them to hit the 250watt limit or less

Then paired with a modern mobile Zen CPU inside the APU with decent power efficient but with equal or higher clocks to the PS5/Pro, for B/C with but better IPC and throughput because of the 3D cache.

Assuming they were going with 3x Crossfire GPU I would expect 48GBs of whatever GDDR memory won't bottleneck performance, so possible sticking with GDDR6 and just relying on the GPU crossfire setup with a memory controller operating in parallel on three 16GB regions to give a big multiplier in bandwidth by controller complexity rather than chasing expensive GDDR, combined with an update IOComplex with three times the bandwidth (ESRAM) to scale appropriately.

If they were doing it this way, they'd be completely covered for PS5 B/C, mostly PS5 Pro B/C with patches to handle clocks and redirecting raster, RT and ML to the different GPUs, and Cross gen by taking the Pro solution and just ramping up the ML AI and RT on those hardly used parallel GPUs and using the newer Zen CPU and more GDDR.

Early native PS6 games would then probably utilise the Zen CPU, new IOcomplex and RAM fully with Raster on one GPU1, RT on GPU2 and ML AI on GPU3,
Fully developed PS6 games would instead split the Raster, ML AI and RT across the GPUs 1-3 as jobs to scale by need rather than dedicate whole GPU cores per feature IMO.
3x Crossfire GPU and 48GB GDDR6 in a console?! With an MSRP of $1499?

CF/SLI is dead even on PC these days.

There's no way Sony won't adopt GDDR7, since it will be cheaper and higher density.

I don't even understand what makes you think GPU2 will only have RT circuitry. Are you sure you understand modern GPU architectures?

Splitting jobs among cores sounds too Cell-y (software rendering), but modern GPUs have dedicated circuitry for RT.
 

PaintTinJr

Member
3x Crossfire GPU and 48GB GDDR6 in a console?! With an MSRP of $1499?

CF/SLI is dead even on PC these days.

There's no way Sony won't adopt GDDR7, since it will be cheaper and higher density.

I don't even understand what makes you think GPU2 will only have RT circuitry. Are you sure you understand modern GPU architectures?

Splitting jobs among cores sounds too Cell-y (software rendering), but modern GPUs have dedicated circuitry for RT.
The BVH accelerators are inside the general purpose WGPs (for raster shader, BVH RT, ML AI CNN's stacked CU caches) so yeah, why wouldn't each have the functionality? It is the very reason AMD and PlayStation haven't been chasing performant Nvidia style ASIC features outside of the WGPs.

The cost of 48GBs of PS5 Pro level GDDR6 for a Ps6 would be offset by the use in 4 PlayStation SKUs they would still have in the market, not including a PS6, so the volumes they are dealing in would certainly let them hit a maximum £750 launch price point IMO.

Splitting jobs is what is already happening, and with the PSSR solution on PS5 Pro relying on stacking L1 and L2 bandwidth from CUs, the granularity that PS5 code is operating is very small, so piping them across GPUs on the same clock cycle (ie in parallel like a big abstract 144 or something CU GPU) makes perfect sense as opposed to chasing monolithic size or clockspeed. against thermals and power efficiency that all diminish the higher you climb

/edit
in case it wasn't obvious I'm not being literal with crossfire/sli as discrete GPUs, I'm still talking about GPU units within a 3Dstacked APU.
 
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It depends... can they have competitive enough ARM cores to rival Zen 6? (wideness, AVX-512)

Well according to the FTC leaks the design (back then) mentioned interesting specs, AMD would be involved one way or another

XBOX-SERIES-NEXT-GEN-SPEC.jpg
 
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SHA

Member
Just because something is on AMD's roadmap, doesn't mean it's going to be on the PS6.
Who ever made this list has no idea of what really is going onto the PS6 and just threw everything at the wall to see what sticks.
Sony is part of the Tech they invented, it's not a %100 AMD.
 
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