Question about ASUS EAX1800XT/2DHTV RADEON X1800 XT, (512 MB) PCI Express Graphic Card

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It doesn't boot up/work/register

When i plug my card into the pci-e slot, and switch the computer on, a small red light near the pci-e extra power port lights up with the label T_FAULT and i have no idea what that means. other than that, plugging the monitor into the card shows nothing, and in windows it does not register

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  • Bufamotis Feb 14, 2008

    I have the 6 pin converted power connector. it's plugged in. (e.g. if its unplugged it registers on the card, as the ext_pwr LED will then also light up.)

    Currently it doesn't.. all i can see is that the fan switches on (...the thing sounds like a mini jet taking off) and the T_FAULT LED lights up.

    Having in effect disabled the on-board Intel GMA graphics via the BIOS, and switching to external PCI-E card output, i know that if i plug the monitor into the card it should show up on screen, (my old, tired 7900GT still works so the slot is fine and the power works.) but it doesn't, the mobo then reverts to the on-board and boots windows. Though windows doesn't even register that the card's been plugged in.

    I checked the seating and its fine, replaced it a few times too. I have an LPG6-500W power supply and since i have but a modest student budget i haven't yet opted for a stronger system, so I'm hoping its not a new power supply fix yet. The card is second hand and was given to me free... it should work, but i can get it to work.

    I've downloaded the user's manual and checked it but couldn't find a good reference in troubleshooting, and the internet is littered with complaints about the card and the T_FAULT thing but no one seems to know what its indicating and most fixes were things like BIOS upgrades (check), miraculous workings (nope), or taking out the RAM and replacing (check)

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The x1800 is a high-end video card, and requires you to plug a power connector into the back of the card. If this is not installed, the video card will not work.

The card should have come with an adapter to change the standard hard-drive style 4 pin molex power connector into the 6 or 8 pin adapter for the video card.

Posted on Feb 14, 2008

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My ATI firepro V7800 makes continuous beeping noise. PC does not boot when I turn it on.....pls help!!!


1) Believe the continuous beeping you hear is a BIOS Beep Code, stating you have a graphics problem. Computer, not video card, is beeping.

2) Do you have the external 6-pin PCI-Express power cable plugged into the graphics card, from the Power Supply?

3) IF, your Power Supply does not have a 6-pin PCI-Express power cable, are you using TWO 4-pin Peripheral power cables, connected to a 6-pin PCI-Express adapter power cable?

To wit;

6-pin PCI-Express power cable example, and also showing a 6-pin PCI-Express adapter power cable on the right,

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

Example of a 4-pin Peripheral power cable,
(Misnomered by many as a 'Molex' power cable. Molex was the first company to make that type of connector. The name stuck, kind of like calling an adjustable open-end wrench a Crescent wrench),

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

Note the color code of the wires used in a 4-pin Peripheral power cable, and a 6-pin PCI-Express power cable.

Red = 5 Volt wire
Yellow = 12 Volt wire
(All are DC Voltage)
Black = Ground wire. (ALL Black wires are Ground wires)

The 4-pin Peripheral power cable has ONE Yellow 12 Volt wire.
The 6-pin PCI-Express power cable has TWO Yellow 12 Volt wires.

The most power that a PCI-Express x16 expansion slot can deliver, is 75 Watts.

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress

"This cable is used to provide extra 12 volt power to PCI Express expansion cards. PCI Express motherboard slots can provide a maximum of 75 watts."

http://www.playtool.com/pages/psuconnectors/connectors.html#pciexpress8

"The older 6 pin version officially provides a maximum of 75 watts (although unofficially it can usually provide much more)"


The ATI FirePro V7800 graphics card requires 150 Watts by itself.

The PCI-Express x16 expansion slot CANNOT deliver the recommended power (Wattage) needed, therefore an external power cable capable of delivering 75 Watts is needed.

What happens if you just use ONE 4-pin Peripheral power cable, in a 6-pin PCI-Express adapter power cable?

The PCI-Express x16 expansion slot contact pins -> BURN

The gold plated contact pins on the bottom of the graphics card -
BURN

The connection on the graphics card for the 6-pin PCI-Express power cable - BURNS

The contact pins in the 6-pin PCI-Express adapter power cable -
BURN

If it is too bad, and cannot be remedied by cleaning, the motherboard is TOAST, and so is the graphics card.

For additional questions please post in a Comment.
Regards,
joecoolvette

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Is the card seated in the slot correctly.
Did you check the bios by tapping the correct key when the computer boots and making sure the computer is set to use the PCI express slot. Sometimes the bios will not allow the PCI express slot to function without manually configuring it to do so.

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1 Answer

Everything boots up fine when the 6-point power cable is not plugged-in to the graphics card, as soon as i plug it in, it makes all the right noises but i get a blank screen....??? Thanks


Hello there, I am the Expert that will be helping you today. My name is damnor01.

Welcome to Fixya.
It is possible that your computer power supply can not deal with the extra load that the PCI-Express cable delivers.
Or the power that is supplied is not being supplied in a constant manner.

Click here for the Minimum Requirement of this Card.
A power supply of 650Watts or greater is recommended for this Graphics card.
Cooler Master Extreme Power Plus or Gamer Extreme will do very well. A similar brand will also suffice.

When it comes to power supplies go overkill!

Also the manufactures name is not know to me, if the problem persists claim warranty support.

Thanking you kindly
damnor01

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Is the PCI Express Slot a 2.0 x16? that could be the issue not positive those cards will work without that specific slot Also check on the graphics card for a 6Pin plug usually they wont work well with out it hooked up to the power supply the plug should say PCI-Epress 1 or 2 good luck!

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Most graphic cards pick up power from the slot they are in
if you have a lead coming from card will have small 2 pin plug on end find the connector it fits to on motherboard

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