this post was submitted on 17 Nov 2023
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What is even more mind blowing is that the 10 Terraflop architecture in the PS5 slim is an APU. AMD could go so much further with APU gpu performance if they really wanted to.
The 780m has 8 teraflops but is limited by memory bandwidth
8 TFLOPS on RDNA 3 is comparable to 4 TFLOPS on RDNA 2 (PS5).
The PS5 uses 36 compute units. The 780M has 12.
The PS5 has 450GB/s memory bandwidth. The 780M has around 100.
The 780M runs at significantly lower power and shares the memory bandwidth with the CPU, but even ignoring that it's like 3-4x worse than a PS5.
it does not work like that... 8tflop rdna3 is becaue they count the fpu perf like it is done on ampere/ada ie both the int and fpu alu can to fp while older u arch had fixed alu for int and fp.
And there is a problem with the rdna3 where this function is not working correctly so we only get the additional 30% fpu perf from the additional fp alu units.
and like u sait the memory is holding back the apus but it will still not perform like an 8Tflop gpu.
does not really matter if they dont do it. u can look at a fiat or an ferrari, both are pretty much owned by the same company yet they are vastly different products. same here, does not matter if the apu in the consoles(ferrari) is so much faster if the desktop apu is like a fiat.
Most likely they just don’t want to cannibalize their mid tier gpu sales since there wouldn’t be a need for one.