Solved Radeon 4870 graphics card not working

D.r. Radeon hd 4670 video card
December 1, 2011 at 21:47:26
Specs: Windows 7, AMD Athlon II X2 Dual-Core Processor 250u (1.6GHz, 2MB total cache) 4GB DDR2 Memory
I got a new power supply unit and graphics card for my computer. The psu seems to work fine when I don't have the new graphics card installed but once I install the card, my computer won't boot. It just keeps going "beep...beep...beep...beep..." and no picture on the monitor. I turned everything off and reinstalled it twice but that didn't work. My card is quite powerful, it's a Radeon VGA Diamond HD4870 and the PSU is a COMPUCASE|HP585D 580W. Ideally I know the PSU should be stronger wattage but I would think it should be enough to get the graphics card to work or at least get the computer to boot up. Help...please...

My specs are as follows:
AMD Athlon II X2 Dual-Core Processor 250u (1.6GHz, 2MB total cache)
4GB DDR2 dual-channel (2 × 2GB) memory (upgradeable to 8GB)
750GB 7200rpm SATA Hard Drive
16x DVD±R/RW SuperMulti drive
Integrated NVIDIA GeForce 6150 SE graphics
8-channel (7.1) high-definition audio
10/100 Fast Ethernet LAN (RJ-45 port)
Windows 7 Home Premium 64-bit operating system
Dimensions: 14.2” H x 7.1” W x 16.2” D

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✔ Best Answer
December 2, 2011 at 12:29:24
Glad it worked out for you.

December 1, 2011 at 23:29:30
When you say it won't boot do you mean that it's not receiving power or that it powers on but doesn't pass POST?

Did you make sure to plug in the 6-pin PCIe power connector (if the video card has one)?

PSU wattage is not typically as important as amperage on the 12-volt rail(s), so be sure to check that out.

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December 2, 2011 at 06:35:33
Thank you for the response denreaper.

The computer powers on as established by the beeping. And yes, I did plug the card itself into the PSU as it has the 6 pin slot. (It's a beast of a card)

How do you check the 12-volt rail(s)? To be honest, I don't even know what those are.

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December 2, 2011 at 08:13:42
When I searched for your card I found these requirements I found two cards:
Power Consumption: 160 Watts on one and 310 Watts on the other
"450 Watt or greater power supply with 75 Watt 6-pin PCI Express power connector recommended" on one and "550 Watt or greater power supply with 75 Watt 6-pin and 8-pin PCI Express® power connector recommended" on the other
Your Power supply Specs:
As you can see by the chart, the '580' has three 12 volt rails that have 16Amps, 20Amps, and 16Amps each with a total of 360 Watts on ALL 3 combined!!
Your video card cannot pull from all three 12 volt rails so you will not have full power available to your video card, especially if you have the second one ("monster") you are underpowering your card. Even with the first one which requires 160Watts just for the video card, one 12volt rail will be 12volts x 16amps = 192 Watts, and that is if there is nothing else on that rail.
You should purchase a power supply that has ONLY one single 12Volt rail so that ALL of the available amperage can go wherever it is needed and not trapped somewhere else (one of your rails could be dedicated to your CPU but you may only be using half or less of that, and another may be dedicated to your PCI cards and/or something else). You should also look for a certified 80% efficiency rating or higher so that more of those ratings actually get to your components.

Of course you COULD have a bad video card, but I would bet on it being the power supply, at least try that out first.

You have to be a little bit crazy to keep you from going insane.

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December 2, 2011 at 08:41:15

Thanks so much. I think you may be on to something as I was trying to save money buy purchasing the power supply I did. I've heard some mixed reviews about it as it didn't work for some folks (probably those with a good graphics card). I was actually searching my other computers power supplies to see if I had one stronger to test out my card but no luck,

Anyway, thanks again. I will try a different psu and take it from there.

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December 2, 2011 at 08:47:09
Forgive my ignorance but would this one work?

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December 2, 2011 at 12:07:50

No that one has 3 / 12 volt rails. Like fingers said, use a SINGLE 12 volt rail like in the corsair line. Look at the link as an example.

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December 2, 2011 at 12:13:28
It was not the power supply all though I did need an adapter for it. I took it to a computer repair place, they tested everything and it turns out it is my card. The card was in the computer for literally five minutes after we got it installed correctly and the thing got all most too hot to touch and the monitor wouldn't get past the start up screen. Thanks for all your help though, I appreciate it.

Oh and thanks to Newegg for selling me a defective piece of crap and for wasting my time and money. Maybe they should actually test their products before shipping them out in the future.

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December 2, 2011 at 12:29:24
✔ Best Answer
Glad it worked out for you.

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December 2, 2011 at 12:40:11
Well it really didn't as my card is crap, lol but I'm glad I figured out what was wrong too.

Thanks again for the help. :)

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