What's new
  • Please do not post any links until you have 3 posts as they will automatically be rejected to prevent SPAM. Many words are also blocked due to being used in SPAM Messages. Thanks!

Odd shutdown issue

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
So I was fiddling with my 480's voltage and clocks to see how far I can push it with WC, but I seem to run into a sudden shutdown whenever I bump up the voltages to 1.125V or up the core clock to 815. Each time I start the OCCT GPU test, it shuts down as soon as it starts. No crashes, no artifacts, no errors - just complete shutdown.

Would this be a problem with the PSU not giving enough power to the cards? Or maybe a motherboard issue? Because afaik, 1.125V is safe for 480's.

Any help is extremely appreciated.
 

_dangtx_

Banned
Joined
Aug 4, 2007
Messages
12,684
Location
mtl
well its possible you are pulling in excess of 650 watts from those overvolted 480's, however the psu should be able to handle it.

maybe theyre pulling too much,rather, more than the above?

PowerColor HD 6870 PCS++ 1 GB Review - Page 21/27 | techPowerUp

stock 480 pulls around 300 something under furmark. if you add voltage,hmm.....

GIGABYTE GTX 480 GV-N480SO-15I Super Overclock Review - Page 30/31 | techPowerUp

you could probably add 100 watts more,each?

SilverStone Technology Co., Ltd - Designing Inspiration

combined +12V 960W/80A(Peak 85A)
 

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
Well, if you put it that way... Maybe I am running out of voltage? Because I have my processor overclocked too (3.6ghz @ 1.45V).

If so, these cards are much more power-hungry than I anticipated :shok:
 

_dangtx_

Banned
Joined
Aug 4, 2007
Messages
12,684
Location
mtl
the only way to tell would be to get a kill a watt or a blue planet energy meter and check whats pulling at the wall.
i still dont get it why enthusiasts dont have one in their drawer...i get ppl who buy dells to check there emails but if you
actually tinker with ya puter? hmmmm

if your eyes pop out then its quite clear, wattson :)
 

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
Very well. I went to hit up the local hardware shops, and all they had were the old fashioned multimeters :sad: Just went to Newegg and bought a kill-a-watt. I'll report back once I find out what my computer pulls off the wall :thumb:
 

_dangtx_

Banned
Joined
Aug 4, 2007
Messages
12,684
Location
mtl
looking good.
start off with idle.

then prime 95 on the cpu...

then furmark on one gpu.

if the numbers are still wordly, then furmark the second one as well :)
 

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
So I haven't received the Kill-a-watt yet, but I've come across an interesting observation: I recently overclocked my CPU up from 3.6ghz to 3.7ghz. It's fully stable as it ran through 30 runs of IBT on high. Now that I try running the OCCT GPU test though , it crashes exactly the same way as when I upped my voltages in my 480's.

Would you say that this is most definitely a power supply issue with this finding?
 

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
Got the Kill-A-Watt. Here's my wattage levels:

Idle: 220W

OCCT GPU: 920W

OCCT Power Supply Test: 940W. After about 40 seconds, it froze, and then suddenly shut down.

So what's the verdict? Power supply overload, or something else?
 

_dangtx_

Banned
Joined
Aug 4, 2007
Messages
12,684
Location
mtl
well it says 960W on the side of your psu for 12v rail(s)....and if you take efficiency and do a bit of math, numbers look pretty :)
 

Hacksaw907

Well-known member
Joined
Dec 9, 2009
Messages
221
Location
Ottawa, ON
well it says 960W on the side of your psu for 12v rail(s)....and if you take efficiency and do a bit of math, numbers look pretty :)
Yeah, I understand that its barely hitting the limits of my power supply. I'll run a few more stability tests to see if I can find the problem.
 

Latest posts

Twitter

Top