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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 281

post #2801 of 38701
are there any reviews on the asus 7950 direct cu 2?
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post #2802 of 38701
So the new 7950's really have me thinking now.

I'm about to build a new rig and I was going to go with 2 7970in crossfire. The problem is my PSU is only 750 watts which I don't think would be enough to power it. The Guru 3d review of the 7950's though says 700 watts is good for crossfiring them. All in all that would save me 100 bucks on the two video cards and about 200 bucks on a new PSU I wouldn't have to buy.

So what does overclock.net think? If I go xfire with 2 7970's it will cost me around $300 more then if I just xfire 7950's. Would the performance increase be worth it? Keep in mind I will be using a 120hz monitor.
post #2803 of 38701
I made some testings and now i'm @ 1230mhz gpu \ 1650 mhz ram at 1.231v (not error free in occt but i'm not experiencing artifacts in games).

1.231v is good for daily use or it is a little to high (temps are fine)?
post #2804 of 38701
Quote:
Originally Posted by Hexa View Post

So the new 7950's really have me thinking now.

I'm about to build a new rig and I was going to go with 2 7970in crossfire. The problem is my PSU is only 750 watts which I don't think would be enough to power it. The Guru 3d review of the 7950's though says 700 watts is good for crossfiring them. All in all that would save me 100 bucks on the two video cards and about 200 bucks on a new PSU I wouldn't have to buy.

So what does overclock.net think? If I go xfire with 2 7970's it will cost me around $300 more then if I just xfire 7950's. Would the performance increase be worth it? Keep in mind I will be using a 120hz monitor.

I regularly run a 3960X and two GTX 580s as part of my motherboard testing, and I don't go over 680W at the wall (using a 1000W Silverstone, UK 240V supply) during a Metro2033 benchmark run.
post #2805 of 38701
Quote:
Originally Posted by Hexa View Post

So the new 7950's really have me thinking now.
I'm about to build a new rig and I was going to go with 2 7970in crossfire. The problem is my PSU is only 750 watts which I don't think would be enough to power it. The Guru 3d review of the 7950's though says 700 watts is good for crossfiring them. All in all that would save me 100 bucks on the two video cards and about 200 bucks on a new PSU I wouldn't have to buy.
So what does overclock.net think? If I go xfire with 2 7970's it will cost me around $300 more then if I just xfire 7950's. Would the performance increase be worth it? Keep in mind I will be using a 120hz monitor.

Your PSU can easily handle 2 7950's

560

The performance is still good, but it's your call

522
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post #2806 of 38701
I pull 350 from the wall with fully loaded and oc'd 2600k and one 7970. You'll have no problem(as long as your psu isn't an overrated pos).

Edit: I run one 7970 on bf3 on a 120hz monitor. I run ultra without AA, and it screams; 65-200 fps.
    
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post #2807 of 38701
I'm sure my 750 watt PSU could run 1 7970 but could it run 2? It's not a pos one either it's a Corsair Prof series.
post #2808 of 38701
Quote:
Originally Posted by Hexa View Post

I'm sure my 750 watt PSU could run 1 7970 but could it run 2? It's not a pos one either it's a Corsair Prof series.

without a doubt it can run too, 7970's use less power than the 6970's you will have no problem running 2 cards on your psu.
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post #2809 of 38701
Well guys 1100 and 1570 will not finish heaven. It locks up on stage 26.... The last stage and errors out. Fps was at like 88 average.

What is giving in?
     
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post #2810 of 38701
Quote:
Originally Posted by Balsagna View Post

Well guys 1100 and 1570 will not finish heaven. It locks up on stage 26.... The last stage and errors out. Fps was at like 88 average.
What is giving in?

How are your cards plugged into your psu? HX1000 is two 500 watt psus so you have to make sure they are both not on the same half.
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