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I tried to record some gameplay videos. But the games then become mostly unplayable.
Firefall, no recording: 60 to 80 FPS
Firefall, while recording: about 5 FPS?
DOTA 2, no recording: absolutely smooth with all graphics settings maxed out.
DOTA 2, while recording: absolutely unplayable, again like 5 FPS.
I got no other programs running that drain noteworthy resources (only the game and recording software).
I had a look at the resource monitor while playing Firefall.
CPU strain without recording: 35% to 40%
RAM, in use: 3.4GB, Standby: 4.4GB
Harddisk, read/write total: 18MB/s
CPU strain: 75% to 85%
RAM: about the same, still 3.4GB to 3.5GB in use and about 4.4GB on standby
Harddisk, read/write total: about 220MB/s
I tried both DXtory (which compresses the video before it's saved on the harddisk) and Fraps (which saves the video uncompressed). With DXtory I get stuttery sounds and jumpy FPS, with Fraps I get normal sounds but steady superlow FPS.
I got following system:
Harddisk space. 4TB
Graphics card: Radeon HD 6800
Anyone got any advice?