PSU for the ATI HD 5770

I have a Gigabyte ATI HD 5770 Radeon 1 GB DDR5 and a corsair 450VX EU (450) PSU.

When I have a load running, like a game, for example Bad company 2 (running at Medium settings @ 1280X1024 res), I get big drops in FPS every once in a while and sometimes the PSU makes a clicking sound, similar to a hard drive searching.

Since I recently aquired both my PSU and GPU, I was thinking of exchanging (if possible) the Corsair 450VX PSU for a corsair 550VX will this help? Is the 450 fine in general and I just got a faulty one or do I need a more powerful PSU?

My comps specs:

Processor: Intel Core 2 Quad CPU Q6600 @ 2.40GHz

Motherboard: Gigabyte G31M-ES2L (rev 2.0)

System memory: 4 GB

Hard drive: WDC WD6400AAKS-00A7B0 ATA Device, 596.17 GB

GPU: Gigabyte ATI HD 5770 Radeon 1 GB DDR5

PSU: Corsair CMP SU 450VX EU (450W)

Monitor: Samsung SyncMaster T220 Max

OS: Vistas Home Premium (32 bit)(SP2)

Thank you in advance!
2 answers Last reply
More about 5770
  1. 450W should be good for such a system...
  2. Userremoved said:
    450W should be good for such a system...

    Thanks for your reply.

    I thought it would be sufficient ... but like I said when I run a heavy load like a game I sometimes hear a clicking sound like a hard drive searching. also I thought the reason for the intervaled drops in FPS in game was do to a lack of power...but I could be wrong.
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