Raedon HD4850 card causing computer to restart

PeteW · 11-05-2008, 09:29 AM

Just bought a new graphics card - a Sapphire Raedon HD4850. I slotted it into my computer and tried turning the computer on. However, once windows started up and showed my desktop, the computer instantly restarted itself. It got to my desktop again next time and restarted itself again, once more and the same result.

Any idea what could be causing this? I have only been running quite a low spec graphics card in the past and never experienced any similar problems. Is this likely to be a problem with the card or something else? My housemate suggested that my power supply is possibly not good enough.

I'm running Windows XP home by the way.

Any help is greatly appreciated

macroman · 11-05-2008, 11:34 AM

that card needs 550w or more 80% load so you will need a PSU with 650w and 26A 12v

bahamut27 · 11-05-2008, 11:50 AM

As I've been feeling the same problems with the same Gfx card, I can now tell you its a PSU problem. To sum things up these top of the line cards need a lot of power and that can't be measured by Watts alone, you'll need to make sure you have available something like 26A on your 12V rail line. New PSU's make available something like 70-80A on a single 12V line - search the web for a Corsair TX750W and you'll know what I mean.

How to check for PSU needs: Power Supply Information and Selection

**wrench97** · 11-05-2008, 01:40 PM

An HD4850 card will be looking for like 30 amps on the 12v rail and a 650-700w quality psu

Seasonic - any model
Corsair - any model
Thermaltake - "Toughpower" series only
Coolermaster - "Real Power Pro" series only
PC Power & Cooling - any model
Silverstone - any model

PeteW · 11-05-2008, 04:53 PM

Thanks so much for all the help everyone.

I have found this PSU by Corsair, seems like a pretty reasonable price to me. Will this definitely be sufficient for my graphics card?

http://www.overclockers.co.uk/showpr...ompliant%20PSU

Thanks again

EDIT:
Also found this slightly cheaper:
http://www.amazon.co.uk/Netzteil-The...5929329&sr=1-4

And this a lot cheaper, but I feel it probably isn't good enough for what I need:
http://www.amazon.co.uk/650W-Extreme...5929525&sr=1-2

Any advice on which one of those is best, or if I can get a cheaper one elsewhere is very welcome.

**wrench97** · 11-05-2008, 05:15 PM

I would rather have the single rail Corsair 750TX over the Thermaltake Qfan series with 4 rails to hard to balance the load across the rails.

PeteW · 11-05-2008, 05:50 PM

Quote:

Originally Posted by wrench97

I would rather have the single rail Corsair 750TX over the Thermaltake Qfan series with 4 rails to hard to balance the load across the rails.

750? The link I posted was for a 650W one. Would that one (the 1st link I posted) be your recommendation then?

Also just found this on ebay - how does that compare?
http://cgi.ebay.co.uk/T-TAKE-W0158-650W-TOUGHPOWER-POWER-EXPRESS-RET_W0QQitemZ140279714052QQcmdZViewItem?hash=item140279714052&_trksid=p3286.c0.m14&_trkparms=72%3A1300|66%3A2|65%3A12|39%3A1|240%3A1318

Thanks again

**wrench97** · 11-05-2008, 05:56 PM

Sorry I meant to type 650 tx single rail. laptop's have small keys to press with big fingers:)

PeteW · 11-05-2008, 06:40 PM

Ok thanks very much wrench. The Corsair one is £80 with postage and I can get this for £68. Will this one still be good enough?

http://cgi.ebay.co.uk/CoolerMaster-REAL-POWER-M650W-PSU_W0QQitemZ290263580832QQcmdZViewItem?hash=item290263580832&_trksid=p3286.c0.m14&_trkparms=72%3A1301|66%3A2|65%3A12|39%3A1|240%3A1318

**wrench97** · 11-06-2008, 01:20 AM

Yes that one will work

PeteW · 11-07-2008, 02:20 PM

Just thought I would let you know:
I bought the Corsair 650W power supply (found out that a shop down the road from me had them in stock for £69!).

Everything is working perfect now.

Thanks very much for all the help wrench and everyone else who contributed.

**wrench97** · 11-07-2008, 02:43 PM

Good to hear you got it working:)

11-05-2008, 09:29 AM	#1 (permalink)
PeteW Registered User Join Date: Jul 2008 Location: England Posts: 9 OS: XP Home	Raedon HD4850 card causing computer to restart Just bought a new graphics card - a Sapphire Raedon HD4850. I slotted it into my computer and tried turning the computer on. However, once windows started up and showed my desktop, the computer instantly restarted itself. It got to my desktop again next time and restarted itself again, once more and the same result. Any idea what could be causing this? I have only been running quite a low spec graphics card in the past and never experienced any similar problems. Is this likely to be a problem with the card or something else? My housemate suggested that my power supply is possibly not good enough. I'm running Windows XP home by the way. Any help is greatly appreciated

11-05-2008, 11:34 AM	#2 (permalink)
macroman Registered User Join Date: Sep 2008 Posts: 148 OS: Windows 7,Vista	Re: Raedon HD4850 card causing computer to restart that card needs 550w or more 80% load so you will need a PSU with 650w and 26A 12v

11-05-2008, 11:50 AM	#3 (permalink)
bahamut27 Registered User Join Date: Nov 2008 Posts: 7 OS: winxp sp3	Re: Raedon HD4850 card causing computer to restart As I've been feeling the same problems with the same Gfx card, I can now tell you its a PSU problem. To sum things up these top of the line cards need a lot of power and that can't be measured by Watts alone, you'll need to make sure you have available something like 26A on your 12V rail line. New PSU's make available something like 70-80A on a single 12V line - search the web for a Corsair TX750W and you'll know what I mean. How to check for PSU needs: Power Supply Information and Selection

11-05-2008, 01:40 PM	#4 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: Raedon HD4850 card causing computer to restart An HD4850 card will be looking for like 30 amps on the 12v rail and a 650-700w quality psu Seasonic - any model Corsair - any model Thermaltake - "Toughpower" series only Coolermaster - "Real Power Pro" series only PC Power & Cooling - any model Silverstone - any model __________________ Power Supply and Selection

11-05-2008, 04:53 PM	#5 (permalink)
PeteW Registered User Join Date: Jul 2008 Location: England Posts: 9 OS: XP Home	Re: Raedon HD4850 card causing computer to restart Thanks so much for all the help everyone. I have found this PSU by Corsair, seems like a pretty reasonable price to me. Will this definitely be sufficient for my graphics card? http://www.overclockers.co.uk/showpr...ompliant%20PSU Thanks again EDIT: Also found this slightly cheaper: http://www.amazon.co.uk/Netzteil-The...5929329&sr=1-4 And this a lot cheaper, but I feel it probably isn't good enough for what I need: http://www.amazon.co.uk/650W-Extreme...5929525&sr=1-2 Any advice on which one of those is best, or if I can get a cheaper one elsewhere is very welcome. Last edited by PeteW; 11-05-2008 at 05:03 PM.

11-05-2008, 05:15 PM	#6 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: Raedon HD4850 card causing computer to restart I would rather have the single rail Corsair 750TX over the Thermaltake Qfan series with 4 rails to hard to balance the load across the rails. __________________ Power Supply and Selection

11-05-2008, 05:56 PM	#8 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: Raedon HD4850 card causing computer to restart Sorry I meant to type 650 tx single rail. laptop's have small keys to press with big fingers:) __________________ Power Supply and Selection

11-05-2008, 06:40 PM	#9 (permalink)
PeteW Registered User Join Date: Jul 2008 Location: England Posts: 9 OS: XP Home	Re: Raedon HD4850 card causing computer to restart Ok thanks very much wrench. The Corsair one is £80 with postage and I can get this for £68. Will this one still be good enough? http://cgi.ebay.co.uk/CoolerMaster-REAL-POWER-M650W-PSU_W0QQitemZ290263580832QQcmdZViewItem?hash=item290263580832&_trksid=p3286.c0.m14&_trkparms=72%3A1301\|66%3A2\|65%3A12\|39%3A1\|240%3A1318

11-06-2008, 01:20 AM	#10 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: Raedon HD4850 card causing computer to restart Yes that one will work __________________ Power Supply and Selection

11-07-2008, 02:20 PM	#11 (permalink)
PeteW Registered User Join Date: Jul 2008 Location: England Posts: 9 OS: XP Home	Re: Raedon HD4850 card causing computer to restart Just thought I would let you know: I bought the Corsair 650W power supply (found out that a shop down the road from me had them in stock for £69!). Everything is working perfect now. Thanks very much for all the help wrench and everyone else who contributed.

11-07-2008, 02:43 PM	#12 (permalink)
wrench97 Moderator, Hardware Team Join Date: May 2008 Location: S.E. Pennsylvania Posts: 18,579 OS: Win7	Re: Raedon HD4850 card causing computer to restart Good to hear you got it working:) __________________ Power Supply and Selection