File write speed seems lower than it should be

[Gexistential]

Hi all.

I am currently trying to record WoW at a lossless 1920x1080 at 60fps. I have tried a number of codecs, including Dxtory's own, Lagarith and Utvideo.

Although my ingame FPS is constantly above 60fps ,I am simply unable to reach a consistent file write speed of 60fps. It seems to hang around 40-50 fps.

Is this expected with my following setup (attached)? If not, what might I do to alleviate this?

As a note, I am writing to the (more or less empty) SSD and WoW is installed on my C.

Many thanks!

[Gexistential]

It would seem it's not my CPU that is bottlenecking my file write speed: I'm not sure if this is a valuable measure of CPU bottlenecking, but Windows Task Manager indicates that my CPU Usage never goes above 55-60% during recording.

[ExKoder]

Please submit a Environment Information.

http://forum.exkode.com/index.php?topic=2.0