[x264-devel] Re: Speed-up method

[Loren Merritt]

On Sat, 3 Mar 2007, telomere 1 wrote:

> QX6700
> 27.9GFlops
>
> Geforce 8800GTX
> (MADD(2flops) + MUL(1flop)) * 1,350 MHz * 128 SPs = 518.4G Flops

QX6700
2.67 GHz * 4 cpus * (1 or 2 sse op/cycle) * (8 int16 or 16 int8 in a sse reg)
= 85 to 341 GIPS

Though x264 at hq settings spends about 60% of its time in simd code, so 
the real estimated improvement is a factor of 2.5 for offloading all of 
that to the gpu.

--Loren Merritt

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