Will this PSU be enough for CrossfireX HD 7970s?

[Steel_Nugget]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182067
I found it on sale, and it says it will supply 750w. So would you trust Rosewill? Or is this PSU decent?
Thanks!

 

[realchaos]

I wouldn't really trust Rosewill for PSUs. Also, 750w may be cutting it depending on your processor and if you're overclocking or not.

 

[KuphJr]

http://extreme.outervision.com/psucalculatorlite.jsp
You can find out how much juice your setup will draw.

As for Rosewill, I guess they are okay. I prefer Corsair or Antec, but that is just me. The Rosewill PSU will probably serve you just fine. Just pay attention to warranty information.

 

[DSzymborski]

Those Rosewills are OK. They're better that some of their older, value PSUs, which aren't really good, but not their top of the lines.

The Rosewills that are excellent are the Lightning/Capstone/Tachyon PSUs, which are Super Flower-built (an extremely reputable manufacturer). I'm using a Capstone semi-modular myself in my general gaming rig. You obviously should be using one anyway, but a surge protector is necessary as the Super Flowers tend to omit the MOV. That's not as big a deal as it sounds, it's something you expect to find in the highest end PSUs (which you do uniformly in the Tier 1s), but your surge protector's protections here are really what you care about. The Super Flowers do the bread-and-butter, voltage regulation, ripple control, extremely nicely, which is why they get excellent reviews.

 

[Steel_Nugget]

http://extreme.outervision.com/psucalculatorlite.jsp
You can find out how much juice your setup will draw.

As for Rosewill, I guess they are okay. I prefer Corsair or Antec, but that is just me. The Rosewill PSU will probably serve you just fine. Just pay attention to warranty information.

I have a I5 4440 for a CPU so not very power hungry. In total my PC would draw around 530w so a 750w is definitely enough.

 

[realchaos]

PSU calculators can give a rough estimate, but a lot of them are usually off. A single 7970 draws 250w, so two of them would draw 500w, assuming you don't overclock it. An i5-4440 draws 84w, totaling to 584w. That gives you a bit of headroom for other components. When you add in other components, you'll probably be drawing about ~650w assuming you don't overclock anything.
If you do want a 750w psu, you'll be better off with this unit: http://www.newegg.com/Product/Product.aspx?Item=N82E16817207015&cm_re=xfx_750w-_-17-207-015-_-Product
It's only $5 more after rebate and is a great quality unit.

 

[Steel_Nugget]

PSU calculators can give a rough estimate, but a lot of them are usually off. A single 7970 draws 250w, so two of them would draw 500w, assuming you don't overclock it. An i5-4440 draws 84w, totaling to 584w. That gives you a bit of headroom for other components. When you add in other components, you'll probably be drawing about ~650w assuming you don't overclock anything.
If you do want a 750w psu, you'll be better off with this unit: http://www.newegg.com/Product/Product.aspx?Item=N82E16817207015&cm_re=xfx_750w-_-17-207-015-_-Product
It's only $5 more after rebate and is a great quality unit.

I thought that the HD 7970s TDP was 220w

 

[realchaos]

Nope a regular 7970 TDP is 250w and the 7970 ghz edition TDP is 270w.

 

[Steel_Nugget]

Nope a regular 7970 TDP is 250w and the 7970 ghz edition TDP is 270w.

Oh well, a 750w is still recommended so I bet 750w will work fine.

 

[realchaos]

Yes but the Rosewill quality isn't very great. You should spend an extra $5 to get the XFX unit above.

 

[Steel_Nugget]

Yes but the Rosewill quality isn't very great. You should spend an extra $5 to get the XFX unit above.

How about the Corsair CX 750w?

 

[realchaos]

The Corsair CX are also fairly low quality. It has a bad capacitor in it so if you try to stress it out, there is a chance it can blow up. The XFX is much better than the Rosewill and the CX.