this post was submitted on 23 Nov 2023
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The law only restricted raw FLOPs, so it has to be that. But the law has a chiplet subclause so it might be there’s some interaction there that pushes the AMD gpus over the edge.
the 4070 ti at 294mm2 (full ad104) with 160 Tflops of Fp16
The 7900xtx GCD is 300 mm2 (Full Navi31 GCD only) with 122 tflops of Fp16
Doubt its that.
Where there might be reasons is that RDNA doesnt hasve AI cores. The tasks are accelerated on the shader cores.Hence the term AI Accelarators. Now assumming nvidia cards ignore the tensor cores.
The 4090 can do only 82.6 Tflop of FP16 (Non-Tensor).
The 7900xtx would still retain its 122 tflops of FP16. making it faster in Fp16 performance.
doesn't RDNA3 have WAVA MMA or Wave Matrix Multiply Accumulate which is their AI cores?
No. Tensor cores have seperate specialised matrix ALUs, AMD's WMMA are instructions on existing shader ALUs.
Tensor cores can process AI tasks in parallel to CUDA cores, RDNA3 can't do both on the same CU.