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HD4850 power issue?

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Last response: in Graphics & Displays
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June 9, 2014 8:58:32 AM

I bought a HD 4850 today. I ran it on a generic brand 500W PSU using 2x 4-pin to 6-pin connector. plugged everything in and booted the pc. everything worked fine. temps were good and I was able to play my games no problems for an hour. I didn't screw in the screws for my hdd yet so I shut down the pc so to put the screws back in. Now when I boot up the pc again, nothing appears on the screen. I get this beep code, one long and two short. I also notice that the CPU fan takes time to start running and same for gpu fan. or it boots up tries to get the cpu fan to turn and then reboots by itself and both the cpu and gpu fan turns but still nothing appears on screen. but if i put back old graphics card (9400gt) boots up just fine no problem at all. What is the problem here? Also, tried to remove the DVD drive and HDD and the problem was not resolved



Here is pic of PSU stiker

pls halp mi

More about : hd4850 power issue

June 9, 2014 9:06:24 AM

That beep code is important. Look up your Motherboard manual online,it should have a list of what each beep code means.

Thats information I'd obtain first.
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June 9, 2014 9:08:05 AM

my motherboard is MSI H61M-P25 (B3)
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June 9, 2014 9:11:37 AM

If a PSU lacks even one PCIe power cable, it is probably NOT safe to use an adapter; it probably lacks sufficient amperage on +12V for a graphics card. When you shut down after your gaming session, did you notice if the PSU was hot?

BTW although I'm not at work (where most photo sites are blocked), I'm not seeing a picture of the PSU where you say there is one.
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June 9, 2014 9:16:39 AM

It is supposed to have 25Amps on the +12V according to the sticker.
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June 9, 2014 6:25:56 PM

Onus said:
If a PSU lacks even one PCIe power cable, it is probably NOT safe to use an adapter; it probably lacks sufficient amperage on +12V for a graphics card. When you shut down after your gaming session, did you notice if the PSU was hot?

BTW although I'm not at work (where most photo sites are blocked), I'm not seeing a picture of the PSU where you say there is one.


Here is what happens with the HD4850
https://www.youtube.com/watch?v=MoXbOfFUBtU

Now if i put in the 9400GT instead
https://www.youtube.com/watch?v=haKuGlJoq-U


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June 9, 2014 6:39:07 PM

What is beeping, a piezo on the mobo, or one on the graphics card? If I had to guess, your +12V drops out of spec under the load of the HD4850.
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June 9, 2014 6:56:49 PM

Onus said:
What is beeping, a piezo on the mobo, or one on the graphics card? If I had to guess, your +12V drops out of spec under the load of the HD4850.


but how come it worked fine the first time, I tried Call of duty 4 multiplayer 1680x1050 worked fine, then tried NFS Pro Street at 1280x800 i was having bad fps 10-11fps. Then I finally tried Naruto Ultimate Ninja Storm 3 at 1280x800(played for a good 40mins and pc didn't shut down by itself or anything), that worked fine as well. I'm scared the GPU may be dead :( 
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June 10, 2014 3:06:59 PM

I'd be more concerned that something in the PSU was baking. Regardless of whether or not the graphics card has been killed, replacing that PSU with a better one will not be money wasted.
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June 11, 2014 10:24:04 PM

I'm gonna buy a coolermaster or a corsair tomorrow and see what happens
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June 12, 2014 4:09:34 AM

Not Coolermaster, unless it is a V-series. Otherwise you'll most likely get near junk. On a budget, look for an Antec VP-450, Rosewill Capstone or Hive (or even RG), or a low-end Seasonic.
The Corsair "CX," although better than what you have, was built with inferior Samxon capacitors that cannot handle heat and may fail early. If you get one, make sure it gets good airflow.
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