FRAPS for benchmarking?
Fraps is good for a few things.
FPS display (works with any game or you throw at it) and Screenshots (some games do not have a quick and easy way to take a screenshot so FRAPS comes in handy for those games).
Sure, you can run a benchmark, but don't go to any serious overclocking forums with only your FRAPS benchmarks.
MSI Afterburner is the best OC utility for video cards (NVIDIA, anyway), since it's the only one that has direct access to the voltage controller chip.
As stated by localhost, MSI AB can capture video MUCH better than FRAPS.
But if video capture is what you're after, there are better tools than FRAPS or MSI AB.
If you have a 6xx or 7xx series NVIDIA card, SHADOWPLAY is your friend (it's part of Geforce Experience and can capture at full HD, with or without audio (+ your own microphone should you want to).
Since Shadowplay is BY and FOR NVIDIA, it has direct access to the GPU stream and therefore can record FULL HD while you play and it will only cost you maybe 2-5% performance, as opposed to most (if not all) other capture software which will often tax you 30-50% performance while recording.