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HD 4850 crossfire problem please help.

I recently rebuilt my pc keeping same PSU and GPU's I have 2 x 4850 crossfire.
My problem is I will sometimes get black screen with pc still on and red leds will be on under both cards.
I cant turn off my pc when the screen is black, so i have to unplug the psu to shut it down then when i reconnect psu it all works fine.
It happens at random even when idle, if you need any more info feel free to ask.
18 answers Last reply Best Answer
More about 4850 crossfire problem help
  1. 2 hours later no reply =,(
  2. How long is your PC on before it goes black? Can you tell us what you have done to try to fix it your self? Is this something that just started or has it been going ever since you rebuilt your rig?

    Next time the it does this try holding down the power button for about 20 seconds. It should shut down. Have you tried just running one GPU at a time to see if it still does it? Samething with your ram.

    Are you chenking temps for your GPU, CPU and core temps? You have a dell PSU which some of there oem's one are a nice PSU, but some PSU's get old and start having issues. This is another thing to check out.

    But for now get back to us with the answers to the questions and we will go from there. Good luck.
  3. DM186 said:
    How long is your PC on before it goes black? Can you tell us what you have done to try to fix it your self? Is this something that just started or has it been going ever since you rebuilt your rig?

    Next time the it does this try holding down the power button for about 20 seconds. It should shut down. Have you tried just running one GPU at a time to see if it still does it? Samething with your ram.

    Are you chenking temps for your GPU, CPU and core temps? You have a dell PSU which some of there oem's one are a nice PSU, but some PSU's get old and start having issues. This is another thing to check out.

    But for now get back to us with the answers to the questions and we will go from there. Good luck.


    Its usually turns black after a while but it only happens once in a while not every time. Temps are all good ive been constantly checking them since rebuild, this issue has only happent around 3 times and pc was built about a week ago. I will try holding the power button longer if it happens. At the moment it doesn't happen often enough to test 1 gpu or ram at a time, if it starts happening more often I will definitely test everything.

    But yeah PSU is old its from a XPS 630i I got it when it was first released not sure what your that was.

    Do you know what the red leds under the cards mean I looked it up on AMD site and on google, all i could find was if red leds are on means your card is dead. Thats obviously not true in my case because im using them right now, and I can play BF3 with stable 60FPS. If you know of any other meaning to the red leds or a website where I can find out that would be great as well.

    Thanks for reply, will try to test everything you said when or if it happens again. If it doesn't happen again that would be even better, ive noticed new pc build usually have a strange start in the first few weeks at least from my experience.
  4. Here is a pic of my PSU. http://minus.com/loCTS7xaq4R4M

    61 amps on the 12v if im correct that's more than enough for my setup right?
  5. Ok so now every shutdown and every restart will mess up and fail to reboot after, only way i can get it to windows is reset cmos restart and keep doing that until it works, im ready to just give up and get a new power supply and RMA the mobo.
  6. Best answer
    It does sound more and more like a PSU. You were close to your guessing that it is 61amps but it is more like 72amps which comes out to 864w But I see where you would come up with 61amps.

    What you need to try before you buy a new PSU is if you can barrow one from a friend or you put your PSU into another rig to test it. Chances are it isn't your MOBO that has failed.

    I am going to link you to some things for you to test some of your stuff. A fur mark test to put stress on your GPU to make sure it is dead or on its way to being dead. The other is Memtest86+ for your ram.

    I am sorry for getting back so late My moms 75th birthday was this weekend and well you know how that goes with family and friends. I hope you have friends to help you check your hardwear?

    If you are going to buy a new PSU make sure you buy these brands or you could be in the same boat you are in now. Corsair, Antec, Seasonic, XFX, Silver Stone, and some OCZ brands. I can link you some of those later if you go that route.

    http://www.ozone3d.net/msi_kombustor/

    http://www.ozone3d.net/benchmarks/fur/

    http://www.memtest.org/
  7. The friend that help me put the pc together told me about the same thing so i ordered this its not one of the brands you mentioned but it had good reviews, I cant try any of those test until I get new PSU cant even stay on windows for more than a min without it turning off. Ill msg you again after i test my new psu. Thanks.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817171053
  8. The ones I told you about were at newegg also and around the same price. You bought the you don't buy. It is on the do not buy list. I will post it here for you to look at. You have a great rig.

    Don't trust it to a shotty PSU. The PSU is the most important piece of hardwear in your rig. with out it you have nothing and if it is a bad one then if it goes then it could take all of your rig with it. It has happened before on here.

    Well at least you got it from newegg it will be easy to return it if you decide to. I am living with a shotty PSU because I didn't listen and also two GPU's. My PSU I think is making a hiss pop sound evey now and then It could be my GPU's.

    This list is a Tier 1 = best PSU to buy and Tier 5 is the worst PSU to buy. You CoolerMaster GX is on the Tier 4 and it will only use 75% of the power stated. I hate to tell you this but I don't want you to burn up your rig. Good luck

    http://www.eggxpert.com/forums/thread/323050.aspx

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049

    This one is a very nice one and comes close to your budget.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817341041
  9. DM186 said:
    The ones I told you about were at newegg also and around the same price. You bought the you don't buy. It is on the do not buy list. I will post it here for you to look at. You have a great rig.

    Don't trust it to a shotty PSU. The PSU is the most important piece of hardwear in your rig. with out it you have nothing and if it is a bad one then if it goes then it could take all of your rig with it. It has happened before on here.

    Well at least you got it from newegg it will be easy to return it if you decide to. I am living with a shotty PSU because I didn't listen and also two GPU's. My PSU I think is making a hiss pop sound evey now and then It could be my GPU's.

    This list is a Tier 1 = best PSU to buy and Tier 5 is the worst PSU to buy. You CoolerMaster GX is on the Tier 4 and it will only use 75% of the power stated. I hate to tell you this but I don't want you to burn up your rig. Good luck

    http://www.eggxpert.com/forums/thread/323050.aspx

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371049

    This one is a very nice one and comes close to your budget.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817341041


    I already ordered that cooler master one it had a good deal because of the mail in rebate but i had no clue it was rated so bad, it will be at my house tomorrow I want to see if it fixes my problem what are the chances it fails and breaks my parts. I can buy that ocz one and use the cooler master until it gets here then swap it out.
  10. You will be able to return the coolermaster since you used newegg. I am sorry that I didn't get back to you on the next day because if I had you probley would have to go through this.

    Well back to your problem I don't think that the new PSU the coolermaster will fry your system. But it will show you if it is the PSU that was going out.

    I have to watch my PSU everyday because of it being a shoddy one. I like to think it is so bad it din't make the list. :D Keep us informed when you get your PSU and see if it is or not the problem. Good luck
  11. Installed new PSU starts up, shuts down and restarts properly. I think this fixed it im going to give it some time and test everything today hopefully by the end of the day I will know for sure that this solved my problems. Thanks DM186 Im currently looking into neweggs return policy to swap the coolermaster for the OCZ PSU, hopefully they will take it back without me having to pay restock fee and shipping.

    Ill leave this thread open until I know that this solved the problem for sure.
  12. Best answer selected by snipersam15.
  13. Thanks again DM186 pc ran perfectly all day I think its fixed
    Im opening a thread in ram if you have any knowledge on that as well.
  14. Ok sounds good and I will keep my fingers crossed. If it is going to cost more to send it back then keep the PSU untill you save up enough money to buy the OCZ. It is always good to have a back up one just in case. Good luck to you. I will be watching.
  15. What is it about the ram you need to know?
  16. I have Crucial Ballistix Elite 1866 and im wondering in bios all i have to do is change DRAM Frequency to 1866 then enable XMP and that's it right. I'm looking at cpu-z and its running at 1866 with the correct clocks and such.

    That's all right or is there another setting i need to change?
  17. No you should be good with that Just watch it for a while and make sure you don't get any hick ups. But I doubt you will. Wow this is some fast ram. Are you trying to burn down your rig lol? :D
  18. This topic has been closed by Mousemonkey
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