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Adding CPUs are a lot cheaper than graphics cards. Why can we just have dual processors and have one do the job of a graphics card?

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If you look at the “lowly” RTX 3060 you’ll see that it has 3,840 CUDA cores. There is just no way that a 16-core (or a 64-core) CPU can come anywhere near the performance level of that type of compute capability.

Granted, the IPC of shaders is a lot lower, and the clock speed is about half, but when it comes to the power in sheer numbers, you see graphics cards being measured in the tens of teraFLOPS whereas desktop CPU is normally measured in single digit teraFLOPS.

Here is a comparison:

  • AMD Threadripper 64-core ($3995) FP32 performance: 13 TFLOPS
  • RTX 3090 10496-core ($1499) FP32 Performance: 35 TFLOPS

By any metric you choose to use, the CPU gets destroyed in a side-by-side comparison.

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4 thoughts on “Adding CPUs are a lot cheaper than graphics cards. Why can we just have dual processors and have one do the job of a graphics card?

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