valkrien Posted April 26, 2009 Share Posted April 26, 2009 Hello everyone, long time reader, first time poster! I have a problem that I am hoping I can get some insight into. I have been the happy owner of a Corsair TX750w power supply since 10/2007. It has been rock solid until this week. I recently replaced a Nvidia Geforce GTX280 with 2 Ati Radeon 4890's in crossfire mode. Installation went flawlessly and the pc booted without any issues. On the desktop and in non demanding 3d applications, the pc is without problems. However, I fired up first Crysis Warhead last night and as soon as the action gets intense (lots of explosions etc.) and the cards crank up, *poof* computer shuts down. No errors, bluescreens, nothing, just OFF. Reboot and no problems. Fire up a game (Crysis, COD4, Bioshock) and again, as soon as the cards draw a large power load, *poof* pc shuts off. I tried each card seperately, non crossfire, and zero problems, but as soon as I use both together, *poof*, computer turns off. I tried different outlets, surge protectors, everything that others have tried here in the forums, but I can replicate the problem everytime. My system is the following: Core 2 Quad e9550 (45nm) @3.6ghz. 2x ATI Radeon 4890's in Crossfire Asus Maximus x38 4gb DDR 1066 2 7200rpm HDD's 1 DVDROM 4 Case fans Xfi Xtreme Gamer According to the Power supply selector, this PSU should be sufficient for this setup. My total draw according to my UPS is only at 590w +/- 10w. Should I replace this PSU? Thanks!! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted April 27, 2009 Corsair Employees Share Posted April 27, 2009 Sounds like a sensor in the PSU is being tripped. I would test the video cards one at a time and see if you can isolate a single card which may be causing the problem. I would also make sure you have the latest BIOS for the board and then load setup defaults in the BIOS and see if there is any change. Link to comment Share on other sites More sharing options...
valkrien Posted April 27, 2009 Author Share Posted April 27, 2009 Ok, ran each card seperately and there were no problems at all. Ran crysis for over 2 hours this morning. Its only when I run them in crossfire together that this happens. Is the Tx750w capable of enough wattage to support these cards running in crossfire mode? I have the latest BIOS from ASUS for the motherboard. If the required voltage is greater than the amount the PSU can put out, could this cause it to shut off like that? Also, the ambient temp in my office is around 75f. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted April 27, 2009 Corsair Employees Share Posted April 27, 2009 The PSU should have plenty of power for your system. I would contact the video card manufacturer and see if they can help you rule out a problem with the video drivers when running in Crossfire. If it looks like it could be PSU related and a replacement might resolve the issue then we can certainly try replacing it for you. Just use the On Line RMA Request Form and we will be happy to replace it. Be sure to check the box that says “I've already spoken to Technical Support and/or RAM Guy.” Link to comment Share on other sites More sharing options...
valkrien Posted April 28, 2009 Author Share Posted April 28, 2009 I ran another test before I RMA this power supply. I ran a loop of crysis warhead with the APC powerchute program monitoring the draw on my total wattage from the wall. During heavy graphics, the total system draw (everything without the monitor) I was running between 650-700w. Could it be that after sustained gaming, the PSU just cannot keep up and is switching off to protect itself (or the system)? The powersupply really cranks up its fan during this time also. The PSU needs to be RMA'd for sure, but is it possible to buy up to the larger 1000w psu and pay the difference? Thanks!!! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted April 28, 2009 Corsair Employees Share Posted April 28, 2009 The PSU is rated to deliver 750 watts at 50 degrees Celsius so I would not suspect you are topping out the PSU. At normal operating temperatures the PSU should be able to provide more than 750 watts. One thing you can try would be to disconnect everything that you do not absolutely need to run the test, which would reduce the power consumption, and see if you still have the same issues. To me it sounds more video driver/card related, but if you would like to rule out the PSU, then lets go ahead and get it replaced. Normally we could only replace the unit for the same part number but you can contact our customer service at 888-222-4346 and dial "0", (510) 657-8747 or email rmaservice@corsairmemory.com to see if any other options are available. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.