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Do I need to buy a new psu?

Hi,
I'm building a new rig with the following:
CPU: Intel Core i5 3570K
MOBO: ASRock Z77 Extreme4 Motherboard
GPU: Powercolor Radeon HD7850 2GB
HDD: Western Digital WD Blue 1TB WD10EZEX
SSD: OCZ Vertex 4 128GB SSD
CPU Cooler: CoolerMaster Hyper 212 EVO CPU Cooler
Ram: 2xG.Skill Ripjaws F3-12800CL9D-8GBRL DDR3

I'm planning on overclocking my cpu and maybe my gpu. I have an old Thermaltake Evo blue gaming 550w from my previous PC and was wondering if it's enough for this build?

If I need to buy a new one this are my choices:

Silverstone Strider 500W ST50F-ES
OCZ Fatal1ty Series 550W Modular
Corsair CX-500 V3 Power Supply
OCZ ModXStream Pro 600W Modular
Antec High Current Gamer 520W Power Supply HCG-520

What would you recommend I do? Thanks!
5 answers Last reply Best Answer
More about tomshardware
  1. You can Crossfire Radeon HD7850's on a 550w PSU with no problems :)

    i5 3570k - 77w (60w realistically)
    Radeon HD7850 - ~120w (100w realistically)
    Misc Components - ~50-80w
    Total Power Consumption - ~247-287w (worst case scenario)

    You're realistically going to see power consumption numbers around 210-250w I can predict. Adding a second HD7850 would only increase these numbers by ~100w; plenty of headroom on a 500/550w PSU :)
  2. Best answer
    Either the Antec High Current Gamer or Corsair CX500V2. You WILL want to buy a new PSU, by the way :lol: I can't trust Thermaltake PSU's for my life.
  3. No plan to Xfire in future?Then I'd follow mocchan's advice.
    If you do plan on Xfire then consider a 750w PSU like the NZXT Hale90 750w.
  4. I'll go with the Antec HCG-520 then. Thanks for the help!
  5. Best answer selected by hasber.
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