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I need confirmation

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August 4, 2012 2:21:23 AM

My computer doesn't post when I've got my MSI 7970 in it. However, it does 100% fine when I am using my other graphics card.

I thought at first maybe it's a wattage PSU error but I came to the conclusion that it just can't be. The other GPU runs fine and the system starts up fine. The system Will not post nothing but lights when I run the 7970.

i just need some confirmation that it is the GPU. As i got it refurbished after the first one had crashed on me.

COOLER MASTER COSMOS II RC-1200-KKN1 Black Steel ATX Full Tower Computer Case
ASUS Xonar Essence STX Virtual 7.1 Channels 24-bit 192KHz PCI Express x1 Interface 124 dB SNR / Headphone AMP Card
G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
CORSAIR H80 (CWCH80) High Performance Liquid CPU Cooler
Intel Core i7-3820 Sandy Bridge-E 3.6GHz
Asus p9x79 deluxe
Cooler master 850 silent pro hybrid

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a b B Homebuilt system
August 4, 2012 2:23:13 AM

whats the computer build. the information you have given us doesnt tell us much
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a b B Homebuilt system
August 4, 2012 2:28:26 AM

the only thing i could suggest now try this 7970 in another system and se if you got something from her
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August 4, 2012 2:30:36 AM

gamerxavier said:
My computer doesn't post when I've got my MSI 7970 in it. However, it does 100% fine when I am using my other graphics card.

I thought at first maybe it's a wattage PSU error but I came to the conclusion that it just can't be. The other GPU runs fine and the system starts up fine. The system Will not post nothing but lights when I run the 7970.

i just need some confirmation that it is the GPU. As i got it refurbished after the first one had crashed on me.


Your GPU uses almost 17A off of the +12V rail all by itself. An extremely high quality ~520W power supply might handle a system with that HD 7970, but you'd be wise to use a ~650W power supply to run it.
If you don't know the exact make/model of your power supply, I'd be nearly 100% certain that your power supply killed the first HD 7970 card, and is not adequate to run the replacement HD 7970 card.

It makes perfect sense that a HD 7970 would cause a system with a weak power supply not to POST, even though that same system will run fine with another graphics card. Most graphics cards use LESS THAN HALF as much power as an HD 7970 does.

In your system, I'd be using a Corsair TX quality 650W power supply. Or better. That is, better quality AND higher capacity.
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August 4, 2012 2:39:47 AM

I did find out the PSU is Cooler master 850 silent pro hybrid. it has decent reviews so I didn't figure much of it being the cause.

the reason i came here simply due to the fact i don't have any systems to test it in nor do any friends.
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