Power supply not enough?

[blizzars]

Recently I began overclocking both my GPU and CPU. To compensate for the extra heat I decided to add a few more case fans. As well as this I decided to add another internal harddrive to my rig.

Now I am a little worried that my power supply won't be able to provide the necessary voltage for everything. I have been using this site to try to estimate everything: Estimation but I'm really unsure if I have filled everything out correctly.

My specs are as follows:
i5 3570k overclocked to 4.3GHz at ~1.25V
7870 Myst Edition overclocked
Samsung 840 240GB SSD
WD10EZEX 1 TB harddrive
ASUS P8Z77-V LK Motherboard
2 Sticks of Kingston HyperX Black 8GB
Hyper212 Plus CPU Cooler
3 Antect Cooling Fans
BitFenix Shinobi case, comes with 2 120mm fans

The power supply I'm using is this one. I guess I'm just asking for some help determining if my computer needs a better PSU or if this one is enough to handle everything.

Thanks for the help, I don't think I missed anything in the parts list, if I did then I'll update the post

 

[Rammy]

You could be using two of those graphics cards and still have some headroom leftover. It really is that comfortable.

 

[blizzars]

Hmm. I was just kinda worried because I took apart everything and put everything back together and noticed from performance issues. It could have been due to the fact I reapplied thermal paste to the CPU cooler heatsink, but I was worried about the PSU not being high enough.

 

[Rammy]

Well overclocking does get a bit messy when it comes to power usage, it's very predictable if you know every single variable, but nobody ever does, and usage changes consumption so much too.
At stock speeds, you won't use much more than 300W for your system, so you can see how much (huge) headroom you have to play with though, it's hard to imagine a scenario where you can possibly run out of power.

It's very unlikely any performance issues are caused by the PSU, but it is possible they might be related to any overclocks you have applied. I'd definitely return things to stock settings and see if things get any smoother.

 

[blizzars]

Awesome, thanks for the help. I'll change everything back and see how things go