lets say 3 computers were encoding and transcoding a heavy video.

computer 1:

Intel core 2 duo e6600

3gb ram

9800 gtx vid card

computer 2:

Amd 64 x2 5600+

3gb ram

9800 gtx

computer 3:

Amd sempron 3400+

3gb ram

9800 gtx vid card

now out of these 3 computers i computer 1 encoded the video in 900 seconds then how long would it take computer 2 and computer 3 to encode the same video.

Thanks.