just got 4850-- can't boot up

[dca221]

Can you help me figure out why my computer won't boot up? I just got a 4850 this evening, upgrading my Sapphire 1950Pro. When I inserted the 4850, my computer does not boot up. When I put my Sapphire back, everything works just fine. Did I get a defective unit, or do I not have enough power? I have an Enermax Noisetaker, with 22A on the 12V rail:

Enermax 485W

I was so looking forward to the upgrade.

thanks for the help in advance!

 

[Ike0069]

I don't know how old your PSU is, but it (with 32A available for +12v) should be able to run that card just fine. I'd double check the pci-e connector and make sure it's inserted fully and not loose.

 

[ajaidevsingh]

I did get a dud card 850 and got it replaced my card was not reg. by the m/b

 

[dca221]

Ike, I have 22A on 12V. does that change the answer?

on the box, visiontek says minimum 450W required, and 550W recommended. anand's tests showed power requirement around 225W when running (22*12=264), so I thought I would be OK

 

[ofacto]

Does the fan on the card spin up when its power on? IF not it could be a dead card.

Try unpluging your hard drive, CD drive, etc and see if it boots.

Also try both DVI ports, it might a monitor issue with it not getting a proper signal from the video card and remaining in sleep mode.

 

[Nathelion]

does it beep when you try to boot?

 

[Quiksilver]

Do fans spin? Does it beep? Does it do anything (eg. turn on but no video)? Explain.

 

[dca221]

thanks for the help! I surely appreciate it.

Before I power on, the little light in the MB is on. when I do turn the power on, the CPU fan goes on for about half a second, then it stops. I did not notice what happens with the fan on the 4850. I'll plug it in again and try.

 

[s44]

Could it be one of those "old motherboards incompatible with PCI-E 2.0" issues folks had with the 8800GT?

 

[Bill Kunert]

Originally posted by: s44
Could it be one of those "old motherboards incompatible with PCI-E 2.0" issues folks had with the 8800GT?

Wasn't that a problem with VIA chipsets? I don't think his Asus uses VIA. If he has the PCIe connector plugged into the video card, and it's supplying current, sounds like a video card belly up.

 

[IlllI]

take the new card out and put the old one in. power it up. if the machine works normal then i would think that the psu is too weak

 

[raddreamer3kx]

sounds like a psu issue to me, has this happen to me too many times.

 

[ThaJollyMan]

My buddy had the exact same problem with an 8800gt just a week ago. He would insert the card and power on and it would power off a half second later. He also had a ocz 1kw psu so power was not the issue. I brought his card over to my house, put it inmy Mobo and it did the exact same thing. He ended up RMAing the card and upgrading. Sounds to me like a defective card. Looks like there is an RMA in the future for you.

 

[GoodToGo]

Try something for me will ya? remove the power connector from the graphics card and power up the PC. 2 seconds after you power up the PC, insert the power connector for the graphics card. If that works, then the card is drawing too much power at the start, thats it. I had the same problem with the 9800pro AIW and this solution worked for me.

 

[leexgx]

not somthing i would do

 

[ThaJollyMan]

Originally posted by: GoodToGo
Try something for me will ya? remove the power connector from the graphics card and power up the PC. 2 seconds after you power up the PC, insert the power connector for the graphics card. If that works, then the card is drawing too much power at the start, thats it. I had the same problem with the 9800pro AIW and this solution worked for me.

Yeah prolly the dumbest thing i think i have seen someone post. If your card does in fact work it prolly wont work after he does that.

I said earlier that i had the same thing happen to my friend. If it was drawing too much power it wouldnt kill the whole computer. try unpluggin all of your peripherals(optical drives, floppy, sound card, case fans) anything drawing power, except for your mobo, processor and RAM. Insert your video card then try to power up. I am still thinking its a dead card. Good luck!

 

[GoodToGo]

Originally posted by: ThaJollyMan

Originally posted by: GoodToGo
Try something for me will ya? remove the power connector from the graphics card and power up the PC. 2 seconds after you power up the PC, insert the power connector for the graphics card. If that works, then the card is drawing too much power at the start, thats it. I had the same problem with the 9800pro AIW and this solution worked for me.

Yeah prolly the dumbest thing i think i have seen someone post. If your card does in fact work it prolly wont work after he does that.

I said earlier that i had the same thing happen to my friend. If it was drawing too much power it wouldnt kill the whole computer. try unpluggin all of your peripherals(optical drives, floppy, sound card, case fans) anything drawing power, except for your mobo, processor and RAM. Insert your video card then try to power up. I am still thinking its a dead card. Good luck!

My card worked after that shiat as well...have you ever done it? If you have then you would know it works..if not then kindly STFU...

 

[ThaJollyMan]

No i havent ever done it, cause it stupid to do. Im obviously not the only one that thinks this is a stupid idea. For any experienced computer user/builder you know that you dont plug and unplug devices when there is power to anything. It even states on the directions for any mobo component that you turn off the power to the PC and remove the power cable. I would say you got lucky that doing that didnt kill your mobo or your card, or anything else for that matter. dca221...do not listen to this very polite gentleman.

So your saying your card worked after doing this or you went out and bought a new PSU and then it worked? I will now kindly STFU.

 

[Bill Kunert]

Plugging in any plug on your computer while it is powered on is a bad idea. I don't care how fast you make the connection you will get arcing and electical noise until the connection is secure. These spikes can hit anything in your computer including your very expensive motherboard and/or cpu. I'm not just pulling this out of my butt. I've worked in electronics, including some very sensitive circuits for 50 years. Don't do it. You may get lucky but chances are you won't.

 

[Marty502]

Originally posted by: GoodToGo
Try something for me will ya? remove the power connector from the graphics card and power up the PC. 2 seconds after you power up the PC, insert the power connector for the graphics card. If that works, then the card is drawing too much power at the start, thats it. I had the same problem with the 9800pro AIW and this solution worked for me.

No matter what, don't do this. Risky and irresponsible.

 

[dca221]

thanks for all the help. it turns out I had a bad unit. I exchanged the first card for a good one earlier today at the local Best Buy, and everything works great now! so the PSU was powerful enough.

by the way, these cards are selling pretty fast at my local BB. friday evening there were about 10 on the shelf when I got mine. today, I picked up the last one to exchange for my initial defective card

 

[kmmatney]

Originally posted by: ThaJollyMan
No i havent ever done it, cause it stupid to do. Im obviously not the only one that thinks this is a stupid idea. For any experienced computer user/builder you know that you dont plug and unplug devices when there is power to anything. It even states on the directions for any mobo component that you turn off the power to the PC and remove the power cable. I would say you got lucky that doing that didnt kill your mobo or your card, or anything else for that matter. dca221...do not listen to this very polite gentleman.

So your saying your card worked after doing this or you went out and bought a new PSU and then it worked? I will now kindly STFU.

It's not a stupid thing to do. I have had the exact same problem and diagnosed it that way....It doesn't fix the issue, but is helpful for diagnosis. In general, you can plug/unplug power connectors with the computer running with no issues. (I'm an engineer, btw...). As an example, you can plug/unplug SATA hard drive power connectors and fan connectors at any time. Everytime you plug/unplug a USB device you are connecting and diconnecting 5V (and there are not any 50V "arcs" )

 

[GoodToGo]

Originally posted by: kmmatney

Originally posted by: ThaJollyMan
No i havent ever done it, cause it stupid to do. Im obviously not the only one that thinks this is a stupid idea. For any experienced computer user/builder you know that you dont plug and unplug devices when there is power to anything. It even states on the directions for any mobo component that you turn off the power to the PC and remove the power cable. I would say you got lucky that doing that didnt kill your mobo or your card, or anything else for that matter. dca221...do not listen to this very polite gentleman.

So your saying your card worked after doing this or you went out and bought a new PSU and then it worked? I will now kindly STFU.

It's not a stupid thing to do. I have had the exact same problem and diagnosed it that way....It doesn't fix the issue, but is helpful for diagnosis. In general, you can plug/unplug power connectors with the computer running with no issues. (I'm an engineer, btw...). As an example, you can plug/unplug SATA hard drive power connectors and fan connectors at any time. Everytime you plug/unplug a USB device you are connecting and diconnecting 5V (and there are not any 50V "arcs" )

Lol, dont bother dude. Its obvious how much PC building experience they have. OP solved the issue anyways...let the sleeping dogs lie. FWIW, I am an engineer as well...masters for that matter too...

 

[MoMeanMugs]

I have an EE degree as well, and you couldn't pay me to do that! If you supposedly have an EE degree, then you should know what happens when you short out a voltage source. If you're so brave, why don't you short an AA battery and leave it in your hand for 5 seconds. We'll wish you best wishes while you're getting your burnt hand fixed in the hospital.

 

[Tim]

Originally posted by: Marty502

Originally posted by: GoodToGo
Try something for me will ya? remove the power connector from the graphics card and power up the PC. 2 seconds after you power up the PC, insert the power connector for the graphics card. If that works, then the card is drawing too much power at the start, thats it. I had the same problem with the 9800pro AIW and this solution worked for me.

No matter what, don't do this. Risky and irresponsible.

One time I was working on an uber quiet PC, didn't realize it was up and running and tried to plug a molex connector to a new optical drive.

ZAP! Buh Bye Optical drive, Buh Bye PSU, Buh Bye feeling in my hand for about 5 mins.