Are you sure about that? The TOP500 list uses the linpack benchmark to measure double-precision FLOPS. The numbers you cite for your machine sound more like tho

Are you sure about that? The TOP500 list uses the linpack benchmark to measure double-precision FLOPS. The numbers you cite for your machine sound more like those you would get with single-precision. For comparision, the GTX Titan can do about 1.5 TFLOPS in double-precision and about 3.2 TFLOPS in single-precision doing GEMM.