Any benefit on a good GPU for video encoding?

[rocka]

Hello!

I know this question has been asked before, but I have looked around, and haven't really found a good answer which fits my needs:

I am looking to upgrade my computer. I don't play games, but use it a lot for video encoding, using x264 as the encoding engine. A lot of graphic cards support CUDA, but x264 does not support CUDA. My question is: Will bying a high end graphic card like GeForce GTX 660 Ti or better make any significant improvement on video encoding speed compared to a cheaper card? I am planning to use an Intel i7 3930k as CPU for the job.

[mh2360]

If you are using x264 then it won't make the least bit of difference which graphics card you use.

[jagabo]

An i7 3930k with x264 and very fast setting is as fast as any GPU encoder (not quite as fast as Intel Quick Sync) and still delivers better quality.

[pearlblack15]

An i7 3930k with x264 and very fast setting is as fast as any GPU encoder (not quite as fast as Intel Quick Sync) and still delivers better quality.

As far as I had tested with paid video encoders, using GPU delivers faster encoding speed compared to CPU encoding but here is the result I got.

- With GPU enabled, the quality was little unbearable than the one encoded with CPU only (GPU disabled).

x264 is best but the resultant video has a lighting difference, i.e the brightness/contrast. I guess I need to adjust them using filters

[jagabo]

As far as I had tested with paid video encoders, using GPU delivers faster encoding speed compared to CPU encoding but here is the result I got.

Did you select settings similar to the "veryfast" preset (or faster) in x264? Were you using some other h.264 encoder? What CPU were you using? You need a quad core or better for x264 to beat GPU encoding.

x264 is best but the resultant video has a lighting difference, i.e the brightness/contrast. I guess I need to adjust them using filters

x264 didn't cause that. Look elsewhere.

[Selur]

x264 is best but the resultant video has a lighting difference, i.e the brightness/contrast.

probably a TV vs. PC scale problem during decoding,..