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Computer reboots after installing new Graphics Card

Last response: in Graphics & Displays
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November 27, 2013 1:34:00 PM

Hello, I've just installed a new GTX 770, I was trying out some games, when the computer suddenly reboots. I have a 700 W PSU, cheap one, that has 40 A on the 12V . I do not think it is that because it isn't too hot when the pc restarts, and as soon as it started up again I controlled the 770 temperature and it was around 35-40 celsius. Any ideas ? Thanks
a b ) Power supply
a b U Graphics card
November 27, 2013 5:15:05 PM

Cheap non-name brand PSUs are notorious for proving less than the stated Watts/ Amps. Try stress testing the CPU or GPU and see if you get the same results. If so then most likely PSU is to blame.
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November 28, 2013 6:04:27 AM

I did the Valley and Heaven benchmark test, one after another, with this results

Heaven

FPS:
43.1
Score:
1085
Min FPS:
7.8
Max FPS:
103.0
System

Platform:
Windows NT 6.2 (build 9200) 64bit
CPU model:
Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (3392MHz) x4
GPU model:
NVIDIA GeForce GTX 770 9.18.13.3182 (2048MB) x1
Settings

Render:
Direct3D11
Mode:
1920x1080 4xAA fullscreen
Preset
Custom
Quality
Ultra
Tessellation:
Extreme

Valley

FPS:
45.3
Score:
1894
Min FPS:
19.6
Max FPS:
85.6
System

Platform:
Windows 8 (build 9200) 64bit
CPU model:
Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (3392MHz) x4
GPU model:
NVIDIA GeForce GTX 770 9.18.13.3182 (2048MB) x1
Settings

Render:
Direct3D11
Mode:
1920x1080 8xAA fullscreen
Preset
Extreme HD

Temperature was 60 Celsius in both cases, yesterday I ran Battlefield 4 maxxed out and play for about half an hour and nothing happened, today I played Assassin's Creed 4 for about half our and it restarted.

EDIT: When I connected the Card to the PSU, I used an old 6 pin to molex adaptor, it came in with my old 460GTS, could that be the problem ?
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Best solution

a b U Graphics card
November 28, 2013 6:43:13 AM

it quite possibly could be the molex adapter. i have had an issue similar when the molex was not connected properly it would short out the system causing it to reboot which i believe is a fail safe to prevent the shortout doing damage to components.

if your psu doesnt have the correct 6-8 pin plug for newer video cards i would recommend upgrading your psu to one with the right connector
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November 28, 2013 10:02:14 AM

Inertia01 said:
it quite possibly could be the molex adapter. i have had an issue similar when the molex was not connected properly it would short out the system causing it to reboot which i believe is a fail safe to prevent the shortout doing damage to components.

if your psu doesnt have the correct 6-8 pin plug for newer video cards i would recommend upgrading your psu to one with the right connector


It was that, it was because the molex were on the same rail, they had to be on different rails otherwise it'll short out the system. I'm upgrading to a corsair CX750 because it has a connector per rail, so it's ideal. Thank you !
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a b U Graphics card
November 28, 2013 10:10:36 AM

no worries glad i was able to help :)  goodluck and happy gaming
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