How to compute the theoretical peak performance of CPU ...

Why do more expensive GPUs have worse MH/s rates than less expensive GPUs and graphics cards?

For example, on this page of mining hardware from the sidebar, the NVidia Tesla K20 gets 134.8 Mhash/s and costs over $3,000.00, while an ATI 7970 gets 825 Mhash/s and costs about $380.00.
Presumably the NVidia has a higher flop rating than the ATI, so why doesn't the more powerful NVidia have a higher mining rate? Is it that the NVidia simply isn't made for the kind of computing involved in bitcoin mining?
EDIT: The ATI card has the following specs
3.79 TFLOPS Single Precision compute power 947 GFLOPS Double Precision compute power 2048 Stream Processors 
The NVidia Card has the following specs:
CUDA cores 2496 Peak double precision floating point performance 1.17 Tflops Peak single precision floating point performance 3.52 Tflops 
So the Flops are comparable overall, and the NVidia card has more cores. I don't understand how the ATI gets over 6 times the Mhash/s than the Nvidia does.
submitted by throwaway08342 to BitcoinMining [link] [comments]

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Peak Double Precision (FP64) Performance: 119.4 GFLOPS: Peak Half Precision (FP16) Performance: 59.72 GFLOPS: Peak Single Precision (FP32) Performance: 3.822 TFLOPS: Pipelines: 1280: Pixel fill rate: 59.72 GPixel/s: Texture fill rate: 119.4 GTexel/s: Thermal Design Power (TDP) 75 Watt: Transistor count: 4400 million: Video outputs and ports ... The theoretical peak FLOP/s is given by: $$ \text{Number of Cores} * \text{Average frequency} * \text{Operations per cycle} $$ The number of cores is easy. Average frequency should, in theory, factor in some amount of Turbo Boost (Intel) or Turbo Core (AMD), but the operating frequency is a good lower bound. The GFLOP in the chart is usually referred as the peak of a single chip. It shows 36.256 Gflop/s for E5520. This single chip has 4 physical cores with SSE. So this GFLOP can also be calculated as: 2.26GHz*2(mul,add)*2(SIMD double precision)*4(physical core) = 36.2. You system has two CPUs, so your peak is 36.2*2 = 72.4 GFLOP/S. the Bitcoin community ( ) noticed Compute4Cash today and we found out that it is used to generate Bitcoins. Bitcoin is a cryptographic peer-to-peer currency and it is secured by computing power. Those who contribute computing power are rewarded with 50 Bitcoins after completing a block (“workunit”; I think Compute4Cash I read that Power* currently has one vector processing unit per core, and it is supporting 4 double precision numbers in it. so for instance for Power S822LC model 8355-GTA I find a peak performance of (8 cores) * (3.32 GHz) * (4*2) = 212 GFlops per socket.

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