Tom's Hardware > Forum > Graphic & Displays > ATI > 4870x2, 3 red lights, no signal to monitor...

4870x2, 3 red lights, no signal to monitor...

Forum Graphic & Displays : ATI - 4870x2, 3 red lights, no signal to monitor...

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mrhodes   11-19-2008 at 03:56:24 AM

So i know this is a lot like the other post, but i still cant seem to fix mine. Everythings brand new, but when i power up, no signal. Im thinking this could be if the 2 power sockets to the video card are wrong? the psu is modular which kind of confused me.


mobo
MB ASUS P5Q3 775 P45

graphics
VGA ASUS EAH4870X2/HTDI/2G

PSU
XCLIO|GREATPOWER 1200W

CPU
INTEL|C2Q Q9550 2.83 775

HD
1T|WD 16M SATA2 WD10EACS

monitor
ACER|LCD 22" 5MS X223WBD

cd
BLU-RAY ROM LITE-ON|DH-4O1S-08

os
WIN VISTA ULTIMAT SP1 64BIT

ram
2x
KHX14400D3K2/2G2GB 1800MHz DDR3 Non-ECC CL8 (8-8-8-24) DIMM (Kit of 2)

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major53   11-19-2008 at 04:34:28 AM
- 0 +

mrhodes gpu hooked up to 2- 6 pin psu connectors

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major53   11-19-2008 at 04:38:51 AM
- 0 +

mrhodes it has 1 -12volt rail @ 85 amps that should work for video/

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mrhodes   11-19-2008 at 05:11:14 AM
- 0 +

the psu has both 6 and 8 pin 12v3 and 12v4. ive tried all combinations of them, right now ive got both plugged into the 12v4, the 6 and 8 pin. With any other combination the fan on the 4870x2 doesnt run. But ive still got the 3 red lights and no signal :(

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mrhodes   11-19-2008 at 07:28:38 AM
- 0 +

i thought i should add that it doesnt post, there are no beeps. (gpu fan not running anymore either) Is this a fault mobo?

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JDocs   11-19-2008 at 07:54:36 AM
- 0 +

The 6 pin and 8 pin connectors should never come from the same rail. That'd pull 225W done a single rail and most multi rail systems have a max rating of 150W (8 pin molex).

Other than that it sounds like either a bust GFX card or motherboard.

Other issues that may cause a no post condition on a new system:

The CPU rail isn't connected or the 8 pin GFX rail is in the 8pin CPU plug.
The memory isn't properly seated.
The CPU isn't properly seated.
The GFX isn't properly seated.

If its non of those its probably something that has broken. Sounds like either GFX or motherboard in all likelyhood.

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