Solved AMD HD 7990 Computer Freezing

November 4, 2013 at 10:03:34
Specs: Windows 7
Hello, i have recently bought a new graphic card and monitor, i bought the AMD HD 7990 and as screen i bought the asus PB278 which goes up to 1440p.

Now before my pc used to work fine and i could play all games, but now that i have put in the new graphic card and the new screen as soon as i start a game, the screen freezes or goes gray or black. I can still hear sound but i cant move my mouse or use alt + tab or ctrl + alt + del. It either does this or when i start a game the screen is moving down. I will have a fixed picture of the main menu of the game but behind it its another one moving around falling from up the screen to the bottom. Every time i start a game this happens and i need to reboot my pc, I don't know why this is happening and have been looking on alot of forums but i cannot find any awnsers, its making me very upset... I also tried to see if it might be because im running on 1440p but the same thing happens in 1080p.

I also like to note that i did reinstall my pc so its a totally new clean version and reinstalled the drivers for the graphic card like 5x aswell.

The weird thing is, i can run one game that i play mainly it's called League of Legends. It did crash 4 or 5 times in the start but after trying the AMD beta drivers and disabling the vertical sync and putting the frame rate uncapped it is working fine now and i can play it without it crashing or acting weird.

I don't understand why i can play League of Legends but any other game crashes or freezes or does something it should not do. I am totally clueloss on how to solve this problem and would really appreciate any help. Sorry for my bad English.

I Also like to note that i am using a DVI-D Dual link cable, as i read somewhere that i might need to use a DVI-I dual link but i am not sure how this would help. And i read somewhere else it could be caused by having speakers and cables near ur DVI cable. I have a HUGE surround system quite close to my monitor and pc and alot of cables, but i have had this with my old screen and graphic card aswell and never had this problem.

Here's my system specs:

Operating System: Window 7 Ultimate 64-bit SP1

CPU: Intel Core I7 2600 @ 3.40GHZ Sandy Bridge 32nm Technology

RAM: 16.0GB Dual-Channel DDR3 @ 686 MHZ (9-9-9-24)

Motherboard: ASUSTeK Computer INC. SABERTOOTH P67 (LGA1155)

Graphics: ASUS PB278 (2560x1440@75hz)
3072MB ATI MD Radeon HD 7900 Series (ATI)
3072MB ATI MD Radeon HD 7900 Series (ATI)
Crossfire Disables

Hard Drives: 932GB Hitachi HDS721010CLA332 ATA Device (SATA)
224GB OCZ-VERTEX3 ATA Device (SSD)

PSU: MS-N750-VAL | 750 Watt ATX PSU


See More: AMD HD 7990 Computer Freezing

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#1
November 4, 2013 at 14:00:40
✔ Best Answer
Your power supply obviously cannot handle your video card when it is under stress, you are going to need a better one with higher specs. Here is your detail sheet:
http://www.ms-tech.de/de/datenblatt...
750 Watts but two 12volt rails (19A + 19A) which is not sufficient to power your system with that monster in it. The fact that the power supply has one 6/8pin PCIe connector and your card requires three 8 pin PCIe connectors should have been a warning sign it would not be enough. Another sign is that the 5V and 3.3 Volt are 36A & 30A should have been a warning that it was not a true 850 watt unit since you will never need that much amperage on those rails because all high draw devices use the 12volt rails on modern systems.
Look for a power supply of 850 Watts with a single 12 volt rail with MUCH higher amperage ratings. Please look at this one:
http://www.newegg.com/Product/Produ...
Notice on the specs that the single 12volt rail sports 70Amps:
+3.3V@30A, +5V@30A, +12V@70A, -12V@0.8A, +5VSB@3.0A
or any of these:
http://www.newegg.com/Product/Produ...

You have to be a little bit crazy to keep you from going insane.


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#2
November 4, 2013 at 19:01:48
Fingers nailed it.

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#3
November 5, 2013 at 02:28:27
Oke thank you very much for your reply.
I already thought it was the PSU but i was not sure.
Anyway thats easy for me to fix i will just buy a new PSU, you think this one will do aswell? http://www.inet.se/produkt/6911373/...

Oh and i think my card requires 2x 8 pins not 3, I only see 2 of them atleast and got 2 plugged in.

message edited by kevinmarijs


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Related Solutions

#4
November 5, 2013 at 02:49:00
I have ordered this one http://www.inet.se/produkt/6911373/... as it was in the list you recommended so I hope it will work.

message edited by kevinmarijs


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#5
November 5, 2013 at 16:40:56
I do not recognize the initial letters, but Corsair does make quality units so that should be good.
The one I found when quickly Googling, had three according to the specs list, but that might have been a misprint or a special super-clocked model.
Good luck and let us know how it turned out for you when it arrives.

You have to be a little bit crazy to keep you from going insane.


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#6
November 6, 2013 at 06:47:09
Hey i just like to say i bought a new PSU and it works fine now! I'm so happy, thank you very much for your help i would have never figured this out myself! Thanks alot! :D

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#7
November 6, 2013 at 13:27:07
Thanks for letting us know...

Skip
Audares Juvo


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#8
November 6, 2013 at 16:00:04
Thanks for letting us know, if you choose a 'best answer', it will mark the thread 'solved'.

You have to be a little bit crazy to keep you from going insane.


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