PSU Recommendations?

Hey guys!

My specifications are in my profile if you need to take a look, but for time-saving i'll post them here too. Anyway, my systems been having frame-rate drops with various games, mainly real new ones such as Skyrim and BF3, overall my system should be able to play these games fine, and the only real problem I can see is the PSU, as it's a bog-standard 650W cheap-*** replacement I bought waaaay before upgrading.

Anyway, even if that's not the issue for my frame-rate drops, i'm gonna upgrade the PSU regardless, as this ones too god-damn noisy. So really I'm here just to get your recommendations, I don't really want to spend over £60 on a new PSU, and have already looked at a few, I was thinking with the 600 - 650W OCZ PSU's, the ZS series or the ModXStream, however I don't know which one is a higher standard or better for gaming, so if anyone want's to help me out or throw me another idea, then feel free, I would greatly appreciate it!

Thank you!

Specs:

AMD X4 955 Black Edition Processor
8GB Corsair Vengeance Ram
ASRock N68C-S UCC Motherboard
NVIDIA GTX 560ti Graphics Card
Standard 650W PSU.
2 Hard-drives. Both SATA II, 250GB & 500GB

 

Honestly, a 700 watt ModX series would be the best option, you need a little more breathing room for that video card, and the 700's are a good quality anyways.

 

And in comparision to OCZ's other series's? Such as ZS, ZT and ZX? Is it worse, better or how does it work in this area?

 

They are all about the same, the Gamexstreme and modxtreme series are just made more for gamers and system builders. I prefer them over other series.

 

Thank you! I'll order one tonight and give some feedback on it

 

Let me know how it works, hopefully everything goes well~!