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HD 4850 Woes

M

mrpawick

[H]ard|Gawd
Joined
May 6, 2007
Messages
1,323
So I can't get it to work in my computer, here's the specs:
AMD Athlon II X4 620
Asus m2n68-am Plus
4gb of ram - Geil DDR2 800
OCZ 500W (OCZ500SXS)

All in a NZXT Gamma case.

Here's the problem.

I can boot and play games off a 3870, which uses PCI-e (so that's working correctly), but when I put in the Hd4850, it doesn't post. Oddly, it works in my friends computer which has a weaker powersupply (430W) so I have more than enough power.

I can't think of anything else that would hinder it from working.

Please help :/

Pat
 
The only two things that I can think of is either the card is not seating properly in the PCI-e slot or your 6 pin power adapter going to the 4850 may be bad. Try reseating the card and using the other 6 pin power adapter.

Good luck!
 
Hmmm, well, I tried reseating it. No avail.

tried different pcie adapter (they're on the same cord)

Nothing.

I just booted off the onboard via VGA and it's not even in device manager, but the fan is going.
 
Which driver did you install? 10.6 just came out but its buggy as hell. Maybe try installing an older one maybe.
 
I am not sure but you should try to update the motherboard BIOS, it may also be a compatibility issue between the older PCI-E motherboard (1.0 I think) and a newer card (PCI-E 2.0)

While normally you can put a PCI-E 2.0 card into a PCI-E 1.0 motherboard, sometimes there are problems. I think especially with a Nvidia chipset which I think you have.
 
Welp, updated bios with the bios tool, but it's not reading, again...

The LEDs on the 4850 light up. But still doesn't post on it.
 
Nah. It's posting per se; it's just not being shown by the videocard. It'll post with the onboard. So it's the videocard - PCI-e connection problem, not the actual posting. I just say it's not posting because it's not being shown on the screen, while connected via DVI on the videocard. =/
 
If the red lights are lit on the HD4850 then it's most likely a power issue. Try to see if you can get a different PSU that's known to be good. Maybe ask your friend to borrow his PSU and see if it works in your system. If it does then you know the your unit is on its way out.

While your unit is more powerful according to the specs, regular usage and overall aging of the PSU will lead to decreased performance over time. It's quite possible that your PSU has met its match with the HD4850.
 
covertash said:
Maybe ask your friend to borrow his PSU and see if it works in your system. If it does then you know the your unit is on its way out.
Click to expand...

I think you should try this though I don't think he will be too happy about it =P
 
rUmX said:
I think you should try this though I don't think he will be too happy about it =P
Click to expand...

Nah, you can do it without removing the PSU if you place the cases right next to each other. But it might be easier to remove the PSU than juggle the two cases like that.

And I agree that it sounds like a power issue.
 
what power supply are you using? sorry if I missed this :confused:

also what power supply is your buddy using?
 
The PSU isn't the problem I don't think because it boots on integrated video and on the HD3870.
 
covertash said:
If the red lights are lit on the HD4850 then it's most likely a power issue. Try to see if you can get a different PSU that's known to be good. Maybe ask your friend to borrow his PSU and see if it works in your system. If it does then you know the your unit is on its way out.

While your unit is more powerful according to the specs, regular usage and overall aging of the PSU will lead to decreased performance over time. It's quite possible that your PSU has met its match with the HD4850.
Click to expand...

Hey,

I just popped in a HD 4890 and it's working fine. It's not a power issue apparently. I can't think of anything else. Perhaps it's a pci-e seating issues?


Possible fixes that have been tried:

- Bios flashing (HD 4890 works, so it's not a pcie gen 1 -> pcie gen 2 or whatever was suggested error.)

- Power supply has enough power to power it, pci-e connectors are working.

- Pci-e slot works, with HD 3870, HD 4890, and HD 2600 pro.

- HD 4850 works in friends computer.

I can't think of anything else guys!

Pat



***I tried reseating it but really, it only goes in one way. =/
 
Last edited:
This really is a bit of a head scratcher. If I had to guess, I'd say it's something motherboard related.
 
Last edited:
Have you tried using DEL (or whatever your shorcut is) to get into BIOS? You might need to force it to rescan for hardware changes.
 
srangara said:
Have you tried using DEL (or whatever your shorcut is) to get into BIOS? You might need to force it to rescan for hardware changes.
Click to expand...

Yeah, when it boots. The computer will boot to every other videocard I have and other friends have. It's bizarre. =/
 
Try clearing CMOS and make sure PNP OS Installed is set to yes, and turn on assign IRQ to VGA.
 
Tried it. No avail. =/

I can't get into the BIOS after cmos'ing to change the PNP OS thing because the videocard doesn't' output video during post or at all. =/
 
Ah I know! It works with every other videocard, but this one! And the videocard works.

Bizarre. I think I might just try to sell it and get a new one. That seems best.
 
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