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Should i buy a new PSU ?

Hello,

First of all, my specs :
CPU : Pentium dual core e2200 2.2 ghz
GPU : AMD Radeon HD 3450
Ram : 4 Go Corsair 667 mhz
PSU : ATX 450W
Motherboard : ECS P4M900T-M2 (V2.0)

So, i'm planning to upgrade my rig, i want to buy an Asus 7790 DC2OC Version and to overclock my cpu to 3/3.2 GHz. A friend told me that my 450w PSU wouldn't run all this, is he right ? :D
If he's right, i'll take a Corsair CX600, is that fine ?

And do you find that the 7790 is overkill for my cpu even if i overclock it ?
I don't think i'm in much of a trouble for the ventilation, my cpu is at 44°C idle, i have 3 fans, one on the PSU, another on the CPU and last one on the lateral side of my case and the gpu has 2 fans so no worries there.

Hope to have answers quickly, thanks for reading ! :D
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  1. Best answer
    Should run just fine with a 450w.

    http://www.extreme.outervision.com/PSUEngine

    Do you have an exhaust fan out the rear or top of the case? If not move one of the side ones to the rear.
  2. exactly what psu do u have and also ur cpu would be a bottleneck for ur gpu
  3. I have 1 fan at the back, it's the PSU one, none on top and the one on the side is quite small.
    Let's say they're like these ones :

    Should I move the left one out the rear ?
    And i don't know what brand my psu is, my brother bought it and he doesn't know either.
    Thank you for the answers !
  4. Yes, move one to the rear. You need one exhaust minimum besides the psu fan.
  5. Well, I had to buy one anyway, i didn't have a 6-pin connector on my old one !
    Plus, after some research a CX500 is enough for that build an the cpu do cause fps drops occasionnaly !
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Power Supplies p4m900t-m2 asus 7790 Bottleneck CPUs e2200 Overclocking Graphics GPUs psu