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ATI Radeon 5870 Sapphire Problem

Last response: in Graphics & Displays
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Anonymous
October 3, 2010 6:43:03 PM

Hi,
I recently got my DIY Vidock to work with my 5870. However, it has one big problem. The second the card goes under load (makes the really loud noise), the connection to my external monitor is instantly lost. The monitor just goes black and flashes red, meaning "standby". Here is my setup:

Dell XPS M1330
4GB RAM
Intel Core 2 Duo T5750(2.00Ghz)
Nvidia GeForce 8400M GS
Windows 7 32-bit Ultimate

DIY Vidock setup:
ATI Radeon 5870 Sapphire
480W Casegears PSU
PE4H 2.0 + EC2C + SWEX
Calypso 22 inch CLM-22LM1 monitor using DVI

The thing is, I can play Crysis very smoothly with the 5870 everything minimum and at 800x600. However, the second I turn the settings up, the card goes under load and the connection is lost.

Thanks!
a c 1362 U Graphics card
October 3, 2010 7:29:01 PM

Could be a broken card or PSU!
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Anonymous
October 3, 2010 7:47:53 PM

rolli59 said:
Could be a broken card or PSU!


The card is a used one I got for $320, but I think it's the PSU. The thing is, I can play Crysis everything minimum at 800x600, where the 5870 performs very well; but the second I change the settings up, the card goes under load and the connection is lost. The PSU was a $15 one I found on newegg.
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a c 1362 U Graphics card
October 3, 2010 7:53:51 PM

I would never risk my $320 GPU with a $15 PSU. Most likely your problem propably does not have enough power on the +12volts.
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Anonymous
October 3, 2010 7:58:35 PM

rolli59 said:
I would never risk my $320 GPU with a $15 PSU. Most likely your problem propably does not have enough power on the +12volts.


Is there any way to confirm that the PSU is the problem? I'm not sure about the wattage, but this is the PSU=
http://www.xoxide.com/casegears-black-steel-480w.html

The 5870 I believe only needs about 230W to run, but I'm not sure about the Amps or anything else.

Is there potential for damage if there isn't enough power?
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Anonymous
October 3, 2010 8:06:41 PM

EDIT (wouldn't let me edit my last message)

I just remembered that there is a switch for 115V or 230V. Which one should I be using for now? I've been using 115V for the entire time.
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Anonymous
October 3, 2010 8:12:36 PM

Quote:
Does your system randomly reboots while playing games or running stress test?


No, it doesn't reboot. It's just that the minute the card goes under load from gaming or 3dmark06 or something, it loses connection with the monitor. In fact, if I extend the display onto the laptop screen, the laptop's display will still be on; just not the monitor.
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Anonymous
October 3, 2010 8:21:44 PM

Quote:
Your psu is failing to provide enough power to your card.Change it ASAP.


I will. Nando4, the (re)inventor of the DIY vidock over at notebookreview, said so also.

Is there any damage that could be done to my card from the PSU? I'm just worried, as I rebooted with it like 15 times yesterday night.
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a c 1362 U Graphics card
October 3, 2010 11:25:31 PM

Anonymous said:
Is there any way to confirm that the PSU is the problem? I'm not sure about the wattage, but this is the PSU=
http://www.xoxide.com/casegears-black-steel-480w.html

The 5870 I believe only needs about 230W to run, but I'm not sure about the Amps or anything else.

Is there potential for damage if there isn't enough power?

That PSU only has 216watts available on the +12 volts where the HD5870 needs it power and being a cheapo it is most likely peak 5 min rating.
Problem is PSU!
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a c 1362 U Graphics card
October 3, 2010 11:27:28 PM

Anonymous said:
EDIT (wouldn't let me edit my last message)

I just remembered that there is a switch for 115V or 230V. Which one should I be using for now? I've been using 115V for the entire time.

That switch is for the voltages you get from the wall. As an example US 115volt Europe 230volt.
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!