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Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > ATI 4870 512 mb power cable confusion

ATI 4870 512 mb power cable confusion

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feck   10-07-2008 at 05:55:14 PM

Hi all,
Have just upgraded from a 8800GTS 320mb to an ATI 4870 512mb.I have changed cards several times before,but have hit a snag this time.My old 8800gts only has one 6 pin power plug but the 4870 has 2.I have tried it in both on separate occasions but just get a power input error message on my monitor.
I have what looks like an adapter lead included but don't know which lead if any they would go in to.I don't want to get it wrong and fry it!
In my PC case is a mass of wires held with cable ties,and there are 3 spare 4 pin plugs if this helps? any help would be massively appreciated indeed!
Motherboard is an ASUS P5N-E SLI n Force(C55) Core 2 Duo.
ATX case +550W PSU
4 GB RAM
Vista 32

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swifty_morgan   10-07-2008 at 06:13:57 PM
- 0 +

You plug 2 of the 4 pin plugs into the "Y" adapter and then plug the 6 pin plug into the other slot on the video card.

You have to have 2 - 6 pin connectors to run the card.

Reply to swifty_morgan
sisley_111   10-07-2008 at 06:26:22 PM
- 0 +

What is your PSU ?

Reply to sisley_111
feck   10-07-2008 at 06:39:31 PM
- 0 +

Thanks very much for reply swifty,I really appreciate it.Sorry,am not great with computers.My Y adapter has room for 4 pins but only has 3 pins with yellow/black and brown wires going in.Spare 4 pin plugs on PC have 4 pins with yellow/2 black and red wires.Bit confused!Am in UK by the way if that helps with anything electrical.

Reply to feck
feck   10-07-2008 at 06:40:54 PM
- 0 +

550 W PSU sisley

Reply to feck
feck   10-07-2008 at 06:47:16 PM
- 0 +

Intel core 2 duo E6400 dual core processor 2.13Ghz

Reply to feck
Yuka   10-07-2008 at 07:15:57 PM
- 0 +

I'll make a bet here...

That power adaptor goes to the same molex (power thingy) that goes from your PSU to you CD/DVD ROM or even to you HDD if it is SATA with both connectors. Also, the Y adaptor has 2 of those molex'es.

_______
/ o o o o \
-------------

That's the molex i'm talking about (kind off, lol) that goes to the CD/DVD ROM. The adaptor should have 2 molex with that form: female and male. Plug the correct one to the one that goes into the CD/DVD ROM, and the other one to the power cable. The last molex (the 6 Pin or 2x3 Pin) goes to the card like you already know.

Hope it works.

Esop!

Reply to Yuka
feck   10-07-2008 at 07:32:25 PM
- 0 +

Thanks Yuka.Just wondered if I get the molex connections wrong,can it damage anything or will it just not work.Tempted just to do trial and error.

Reply to feck
Yuka   10-07-2008 at 07:37:42 PM
- 0 +

It would be really really hard to get them wrong actually... All power connectors (molex'es) from the PSU are different from each other when they have different power throwoutput, even some with the same power, have a different design.

In the worst case, your card won't get enough juice and still complain.

Esop!

Reply to Yuka
feck   10-07-2008 at 07:46:34 PM
- 0 +

It's just I can't see what part of my PC the 3 spare molexes originate from.Such a jumble of wires.

Reply to feck
feck   10-07-2008 at 09:40:08 PM
- 0 +

Ok so I decided to bite the bullet and plug it in.It fired up first time and seems to be working well on Warhead/clear sky and COD4 for over an hour now.Thanks so much to Yuka and Swifty for all your help.It was really appreciated and I'm grateful for your time.

Reply to feck
Yuka   10-07-2008 at 10:22:39 PM
- 0 +

No problem there, mate.

Enjoy the card =D

Esop!

Reply to Yuka
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