Power Supply Efficency for mATX Case

[obogobo]

I'm wondering what level of 80 PLUS efficiency I should consider for the power supply in my NZXT Vulcan mATX case, I know with increased efficiency comes less energy wasted to heat, and heat is obviously something I'm trying to minimize in such a small environment.

What do you guys think? I'm looking through Corasir and NZXT PSUs on Newegg and at the very least am going for a Bronze level rating to minimize heat. 600-750 watts by the way for 2 Radeon 7xxx series cards.

Thanks!

 

[abekl]

Is it the case that Matx? If so, then you need a Matx sized PSU also.

 

[geekapproved]

TWO 7XXX series cards is kind of vague, there would be a huge difference in the psu needed for 7750's vs a 7970's.

 

[obogobo]

TWO 7XXX series cards is kind of vague, there would be a huge difference in the psu needed for 7750's vs a 7970's.

You're right, they will be 7850's or upwards depending on how good of a deal I can score.

Is it the case that Matx? If so, then you need a Matx sized PSU also.

Are you sure about this? Check out the case on Newegg, it fits an mATX mobo but is relatively spacious!

http://www.newegg.com/Product/Product.aspx?Item=N82E16811146065

 

[abekl]

Well I just checked the case specs, and sure enough it says ATX PSU, so I guess you're good to go with a standard PSU.

 

[obogobo]

Which is good news. I am however still wondering if the heat dissipation between a Bronze certified and Gold certified PSU would be substantial enough to making dropping the extra $100 worthwhile. I know it's only ~10% efficiency difference but that's a reasonable amount in terms of temperature, no?

 

[abekl]

No. Not that much of a difference that spending any extra money is warranted. I speak from experience.