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Separate PSU for a New GPU

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#1
So here's the story I bought a Dell XPS 8300 with an I7-2600, 8GB Ram, a Gt 530 GPU, and here's the best part... a 450 Watt PSU :banghead:
I need to power Gtx 560ti because I can't do that with a 450 watt PSU.
Would it be easier to get a Corsair 850 watt PSU and switch it out? Or get an external PSU, and power it with the second PSU? Any thoughts would be great. Thanks
 
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#2
So here's the story I bought a Dell XPS 8300 with an I7-2600, 8GB Ram, a Gt 530 GPU, and here's the best part... a 450 Watt PSU :banghead:
I need to power Gtx 560ti because I can't do that with a 450 watt PSU.
Would it be easier to get a Corsair 850 watt PSU and switch it out? Or get an external PSU, and power it with the second PSU? Any thoughts would be great. Thanks
I think a good 550W would do but I'm quite sure you don't need an 850W PSU to power that PC... :)
 
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#3
im going to go with a 750 because I might want to do a sli and/or add a capture card if there is room.

Do you think I can switch it out or will I have problems since its a OEM comp?
 
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#6
For dual 560 Ti SLI, a 42a, 700w PSU would suffice.
 

Bo$$

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#7
Thermaltake, OCZ, Enermax and XFX are all brands to consider as well. Just check the warranty on each and pick one that suits your needs whilst being a good price