- Feb 21, 2013
- 12
- 0
- 10,510
I got two GTX 770's to replace my old GTX 660Ti about three weeks ago, and ever since then Sony Vegas GPU acceleration has caused render times to go up by about 25% compared to rendering with the CPU only. Vegas recognizes both of the 770's in the preferences (I realize that only 1 will ever be utilized by Vegas), and GPU-Z shows that the 770 selected is operating at about 60% load while rendering alongside the CPU, but this causes render times to go up by about 25% compared to CPU only rendering. It actually takes longer to render now than it did with my old 1055T. Would re-installing Vegas 12 help the problem and speed up the render times?
System specs:
i7-4770k @ 4.0ghz
2x GTX 770 4gb in SLI
16gigs G.Skill Ripjaw 1600mhz
Using 337.50 Beta drivers (Same thing happens on newest recommended drivers, as well)
(And in case you ask, the GPU is not overheating while rendering and slowing clock speed. It usually maxes out at about 55 C, with ambient temperature at 29 C)
Render Settings:
Custom MP4 format
1080p @ 30fps (16mbit)
With CPU rendering only, it takes about 30 minutes to render a 20 minute video @1080p. With GPU acceleration enabled, it takes over 40 minutes to render the same video.
System specs:
i7-4770k @ 4.0ghz
2x GTX 770 4gb in SLI
16gigs G.Skill Ripjaw 1600mhz
Using 337.50 Beta drivers (Same thing happens on newest recommended drivers, as well)
(And in case you ask, the GPU is not overheating while rendering and slowing clock speed. It usually maxes out at about 55 C, with ambient temperature at 29 C)
Render Settings:
Custom MP4 format
1080p @ 30fps (16mbit)
With CPU rendering only, it takes about 30 minutes to render a 20 minute video @1080p. With GPU acceleration enabled, it takes over 40 minutes to render the same video.
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