i installed a graphics card today and the computer wont work

Ibm Thinkcentre s50 desktop computer - 1...
December 9, 2011 at 05:02:51
Specs: Windows XP, 2gb
why wont my computer start properly with the nvidia geforce 8400 gs

so today i installed my nvidia geforce 8400 gs and when i turn my computer on it gets to the starting screen then the loading screen but just before it gets to the screen where you log-on i get a black screen please help! i just want to play games on my computer

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December 9, 2011 at 05:53:59
Is the link below the same as your computer? If so, the power supply in there is only 200W. I would guess that is your problem.

The 8400GS draws 71watts which = 6A@ 12V. I don't think you have enough power to run that card. Not sure that you can upgrade the PSU much either. Those small form factor cases are restrictive.

The reason you can see video at the start is because all video cards have 2 modes. Standard VGA which runs without the need of any special drivers and then the higher performance GPU which draws more current.

There is a slight possibility there is a driver conflict. Try booting into Windows Safe Mode by tapping F8 at start up. Then remove the current drivers while in Device manager.

The long and short of things is that your unit was not designed for gaming.


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December 9, 2011 at 06:21:21
The IBM S50 appears to be a small form factor unit and the motherboard has no AGP slot and pre-dates PCIe, so it seems what you are installing is a PCI version of the 8400 gs graphics card.

What is the specifications of the powersupply in that system. It may be the graphics card is drawing more current that the PSU can handle. I have been unable to find a manual online that lists this info.

Where did you get the graphics card? Presume it is a used item. Do you know it was working before you got it?

Goin' Fishin' (Some day)

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December 9, 2011 at 09:34:21
I doubt the power supply is the problem, The 8400GS is an extremely low end card therefore it doesn't consume much power. According to the following chart, only 32W under full load:


Did you uninstall the drivers for the onboard video before installing the card? Did you enter the BIOS & change the settings? Disable the onboard video & change the Initial Display setting to the new card? (these settings may or may not be available)

"i just want to play games on my computer"

Then you should have got an actual gaming card. Have a look at where the 8400GS ranks:




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December 9, 2011 at 15:12:49
It appears the 8400GS came in two flavours. a 256mb and a 512mb.
The power consumption tables in riider's link are based on the 256mb version.
Look at all the 512mb cards listed there and the power consumption is double.

Othehill is correct. The PC comes with only a 200W powersupply which is insufficient to run a graphics card that requires 6 Amps. These S50s were built for corporate use and not ever meant to be upgraded. There is little chance the OP will get even this low-end graphics card working let alone any "real" gaming card. "Real" gaming cards don't come in PCI configuration and they require powersupplies with 20 or more Amps of +12V to say nothing of the system CPU & Ram required to feed such a card.

Goin' Fishin' (Some day)

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