I'm looking into the next upgrade for my system (listed below), which will be another MSI GTX 560Ti TwinFrozr 2 to run in SLI. When I built my system, this was a consideration and I got the XFX 750W PSU:
However, I also plan to OC my system to about 4.5GHz. I won't be pushing the GPUs any harder than their out-of-the-box overclock, and I was wondering if my exisitng PSU will be fit for purpose. I've checked the PSU calculator and online searching seems to indicate it'll be fine, but I was wondering what the community thought? Thanks.
Motherboard: Asus P8P67-Pro CPU: i5-2500K Memory: 2x2GB G.Skill Ripjaws (7-8-7-24) PSU: XFX 750W Pro Core HDD: 1TB Samsung Spinpoint F3 Graphics: 1GB MSI GTX 560Ti TwinFrozr2 Case: Corsair Obsidian 700D Aftermarket: Hyper-212 Plus CPU cooler (push-pull) <--- will be replaced for OCing (Dark Rock Pro, most likely) OS: Windows 7 (x64)
I agree with your conclusion that your PSU will be plenty for your system, overclock and all.
Cheers...as you can imagine, I don't want to plug another graphics card in and get smoke out the back!