Upgrading processor/motherboard, PSU question

[Compatriot Block]

So my new CPU and motherboard just arrived, and I'm going to teach myself how to install them pretty soon. The only thing I'm concerned about is the power supply unit, as I'm completely new to this stuff and I can't estimate power consumption on my own.

The new CPU is an i5 3750k, and I'm currently using two crossfired AM HD 6770s.
My PSU is listed on Newegg as an "Antec BP550 80PLUS CERTIFIED PSU." So 550W I think?

Is that a decent enough PSU? I don't know how dangerous it is to cut that stuff pretty close.

 

[sneakypenguin]

108X 2 plus whatever the i5 puts out I'd say you should be good but you'd be cutting it close if you OC'd the i5k.

 

[xefaros]

550w is extremely close to the breaking point.Its not about the cpu that much as for the crossfire.If your previous CPU and crossfire didnt show some tearing hiccups or shutdown problems i dont see how it could affect the newer setup.If you can check the motherboard manual and see how much power it can supply to the CPU and motherboard.Consider that 6770 its 125w-175w(and you got 2) just do some math.

 

[Compatriot Block]

550w is extremely close to the breaking point.Its not about the cpu that much as for the crossfire.If your previous CPU and crossfire didnt show some tearing hiccups or shutdown problems i dont see how it could affect the newer setup.If you can check the motherboard manual and see how much power it can supply to the CPU and motherboard.Consider that 6770 its 125w-175w(and you got 2) just do some math.

So I should probably bump it up to 600-650ish? I've never had any trouble with my current setup, except for lately my mouse has started to freeze for a second and then catch up.

Say, anyone know what could be causing that? I've been kind of hoping it'd just go away, since I've tried everything I've found online.

 

[xefaros]

550w is extremely close to the breaking point.Its not about the cpu that much as for the crossfire.If your previous CPU and crossfire didnt show some tearing hiccups or shutdown problems i dont see how it could affect the newer setup.If you can check the motherboard manual and see how much power it can supply to the CPU and motherboard.Consider that 6770 its 125w-175w(and you got 2) just do some math.

So I should probably bump it up to 600-650ish? I've never had any trouble with my current setup, except for lately my mouse has started to freeze for a second and then catch up.

Say, anyone know what could be causing that? I've been kind of hoping it'd just go away, since I've tried everything I've found online.

Every time you install new hardware you should do a reinstall of the OS so unless you already did that it would be suggestible to bump the power a bit since i am guessing that you also have inside the tower cd+hdd+ram and all those take power too depending on model.

A small suggestion is to temporary disable the crossfire to see if you still have hiccups so you just dont go on a spending spree cause a 550w would easily support a single gpu

 

[Compatriot Block]

550w is extremely close to the breaking point.Its not about the cpu that much as for the crossfire.If your previous CPU and crossfire didnt show some tearing hiccups or shutdown problems i dont see how it could affect the newer setup.If you can check the motherboard manual and see how much power it can supply to the CPU and motherboard.Consider that 6770 its 125w-175w(and you got 2) just do some math.

So I should probably bump it up to 600-650ish? I've never had any trouble with my current setup, except for lately my mouse has started to freeze for a second and then catch up.

Say, anyone know what could be causing that? I've been kind of hoping it'd just go away, since I've tried everything I've found online.

Every time you install new hardware you should do a reinstall of the OS so unless you already did that it would be suggestible to bump the power a bit since i am guessing that you also have inside the tower cd+hdd+ram and all those take power too depending on model.

A small suggestion is to temporary disable the crossfire to see if you still have hiccups so you just dont go on a spending spree cause a 550w would easily support a single gpu

Oh, my mistake for not being clear, I haven't installed the new parts yet. I was referring to my old stuff that I've had for a bit over a year now.

Odds are I'll just grab a new PSU before I install it. So now I just need to figure out the damn mouse problem.

Thanks for the help everyone.

 

[J Tyran]

Your cutting it fine, if you factor in the potential for PSU degradation you might find you could end up with some BSODs or performance issues under heavy loads. For the price its worth getting a new one for peace of mind, you might as well do it all when you take it all to bits anyway. Frustrating too put it all back together only to find you have problems.