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HD 7990 worth it for 120hz gaming?

post #1 of 8
Thread Starter 
Found a 7990 for 599€ discount. The thing is I'm not sure if I'd need to upgrade my PSU as well... Its Corsair AX750W and got i7 2600K @ 4.4GHz... Guess I'd need minimum of 850W unless I ran my CPU at stock speeds?

I've got GTX 570 right now, but don't think I can hold up with it for too long, as the card barely delivers what I need to get most out of my 120Hz monitor. So the most important point is do I need to upgrade the PSU or not? And is there any significant bottleneck using PCIE 2.0 x16 for the card?

Thanks in advance.

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post #2 of 8
Quote:
Originally Posted by Questionmark View Post

Found a 7990 for 599€ discount. The thing is I'm not sure if I'd need to upgrade my PSU as well... Its Corsair AX750W and got i7 2600K @ 4.4GHz... Guess I'd need minimum of 850W unless I ran my CPU at stock speeds?

I've got GTX 570 right now, but don't think I can hold up with it for too long, as the card barely delivers what I need to get most out of my 120Hz monitor. So the most important point is do I need to upgrade the PSU or not? And is there any significant bottleneck using PCIE 2.0 x16 for the card?

Thanks in advance.

Graphics card gain little benefits from using PCIe 3.0 over 2.0.

What games and resolution are you trying to maintain 120 FPS?

EDIT: you would be better off getting CF HD7950s instead of the HD7990.
Edited by aznpersuazn - 8/6/13 at 6:43am
post #3 of 8
Quote:
Originally Posted by Questionmark View Post

Found a 7990 for 599€ discount. The thing is I'm not sure if I'd need to upgrade my PSU as well... Its Corsair AX750W and got i7 2600K @ 4.4GHz... Guess I'd need minimum of 850W unless I ran my CPU at stock speeds?

I've got GTX 570 right now, but don't think I can hold up with it for too long, as the card barely delivers what I need to get most out of my 120Hz monitor. So the most important point is do I need to upgrade the PSU or not? And is there any significant bottleneck using PCIE 2.0 x16 for the card?

Thanks in advance.
that's like $800US dollars, like $795 to be exact.
that's enough to give you more options then the 7990.
switching from nVidia.?
try a single HD 7970 GE before you go 7990 and see how that plays.
if staying nVidia then GTX 780 first then see how that plays too..

2cents.gif
post #4 of 8
Thread Starter 
Quote:
Originally Posted by aznpersuazn View Post

Graphics card gain little benefits from using PCIe 3.0 over 2.0.

What games and resolution are you trying to maintain 120 FPS?

EDIT: you would be better off getting CF HD7950s instead of the HD7990.

I play games BF3, Crysis 3 etc and in the future stuff like BF4. The resolution is 1080p. The problem is my motherboard doesn't support 2x PCIE 2.0 x16 which would probably bottleneck those 7950's bad. GTX 690 would take less power, but it's also 400€ more expensive where I live, so I cannot see that as an option either. Also heard those 9000 series are coming in like October, but after all if you keep on waiting there's always something better coming out...

But anyway, would that Corsair AX750W be enough for HD 7990 and relatively mild OC for i7 2600K?
post #5 of 8
Which version? First 7990 or Malta?
post #6 of 8
Thread Starter 
Quote:
Originally Posted by kfxsti View Post

Which version? First 7990 or Malta?

Reference version from Sapphire.
post #7 of 8
Quote:
Originally Posted by Questionmark View Post

Reference version from Sapphire.

The product specs requires 2x 150W 8pin power connectors, which results in 300W on the +12V rail, which means the card uses at least 25A on the +12V rail. I believe you will be fine with that AX750 PSU with mild OCs on the i7.
post #8 of 8
A little late to the party, but from what I've seen the Sapphire card lists a 750w minimum. The manufacturers usually bump up the necessary power just to avoid complaint issues. I've also seen that the 7990's consumption is about 375w, so that might put things in perspective
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