Divergent Result The same code generates different results on different devices

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi guys,

My friend wrote a code that perform some calculation with a 8400M GS and the ran the code in a 9800GT. He reported that each device return a different result. There’s a difference on the precision of floating point operations on these devices?

Thanks in advance.

2

I’ll get back to you on that one, just as soon I’ve finished measuring the piece of string I’ve got on my desk…

A properly scaling code should have been substantially faster on the 9800GT, but without more information you’re not going to get anything other than wild speculation as to what the reason may be.