8-pin to 6-pin adapter?

Gimp563 · 11-18-2008, 12:05 AM

I'm sure there have been other topics kind of like this one, but I'm having an issue myself. My power supply is an Antec 850W shown here: http://www.newegg.com/Product/Produc...82E16817371009

It has 2 6-pin and 2 8-pin power connectors. I'm running a Radeon 4870 which is currently using both my my 6 pin power connectors. The issue is I wanted to buy a second video card. Either a 4850 or a 3870 to try out Crossfire. The trouble is, these cards all are connected with a 6-pin power connector.

So the real question I'm asking is, is there an adapter that can convert my power supply's 8-pin connector into a 6-pin connector to hook up to the video card?

**emosun** · 11-18-2008, 12:54 AM

Welcome to tsf. You can only crossfire identical gpu's. Meaning it must be a 4870 with a 4870. You can't crossfire any crossfire compatilbe gpu's with eachother, they must match.

And yes they do make 6 pin to 8 pin adapters. However I'm not sure if they are universal.

http://www.pcconnection.com/IPA/Shop...ci_sku=8708329
http://www.thermaltakestore.com/8pin...1--p86112.html

**magnethead** · 11-18-2008, 08:24 AM

Quote:

Originally Posted by emosun

Welcome to tsf. You can only crossfire identical gpu's. Meaning it must be a 4870 with a 4870. You can't crossfire any crossfire compatilbe gpu's with eachother, they must match.

And yes they do make 6 pin to 8 pin adapters. However I'm not sure if they are universal.

http://www.pcconnection.com/IPA/Shop...ci_sku=8708329
http://www.thermaltakestore.com/8pin...1--p86112.html

check that. AMD changed the rules. any x8x0 series card and be crossfired, but the results for combinations are marginal. The most optimal is when the gpu is the same.

most cards come with one 8 to 6 adapter (yes they're universal).

**emosun** · 11-18-2008, 08:32 AM

Quote:

Originally Posted by magnethead

check that. AMD changed the rules. any x8x0 series card and be crossfired

Really?

Gimp563 · 11-18-2008, 11:15 AM

Alright. I don't think I saw an adapter in my video card box, but I'll have to take another look. Thanks a lot guys :)

**Lead3** · 11-18-2008, 07:56 PM

Hi,
From what I can see from Antec's WEB site the eight pin PCI-e connectors are really 6+2 pin connectors, which means they convert to 6 pin.

Gimp563 · 11-19-2008, 06:35 AM

I can't thank you guys enough for the helpful info. My 2nd video card should be here tomorrow :D

Gimp563 · 11-21-2008, 09:00 AM

Update on this: I received my video card in the mail today and they will not Crossfire. I installed the drivers and the option doesn't show up in Catalyst. I've been running about other forums looking for answers and apparently the 3800's don't Crossfire with the 4800's. I feared this was going to happen, but I had heard both you could and you couldn't, so I figured I would try for myself.

**grimx133** · 11-21-2008, 08:55 PM

You do have a bridge on eh?
http://shop.ati.com/product.asp?sku=3186855

11-18-2008, 12:05 AM	#1 (permalink)
Gimp563 Registered User Join Date: Nov 2008 Location: Alexandria, MN Posts: 5 OS: Vista Home Premium 64-bit	8-pin to 6-pin adapter? I'm sure there have been other topics kind of like this one, but I'm having an issue myself. My power supply is an Antec 850W shown here: http://www.newegg.com/Product/Produc...82E16817371009 It has 2 6-pin and 2 8-pin power connectors. I'm running a Radeon 4870 which is currently using both my my 6 pin power connectors. The issue is I wanted to buy a second video card. Either a 4850 or a 3870 to try out Crossfire. The trouble is, these cards all are connected with a 6-pin power connector. So the real question I'm asking is, is there an adapter that can convert my power supply's 8-pin connector into a 6-pin connector to hook up to the video card?

11-18-2008, 12:54 AM	#2 (permalink)
emosun Moderator Hardware Team Join Date: Oct 2006 Location: usa Posts: 5,535 OS: xp pro sp2 My System	Re: 8-pin to 6-pin adapter? Welcome to tsf. You can only crossfire identical gpu's. Meaning it must be a 4870 with a 4870. You can't crossfire any crossfire compatilbe gpu's with eachother, they must match. And yes they do make 6 pin to 8 pin adapters. However I'm not sure if they are universal. http://www.pcconnection.com/IPA/Shop...ci_sku=8708329 http://www.thermaltakestore.com/8pin...1--p86112.html __________________ Speedfan Everest Gpu Benchmarks How to install a power supply How to install a video card

11-18-2008, 11:15 AM	#5 (permalink)
Gimp563 Registered User Join Date: Nov 2008 Location: Alexandria, MN Posts: 5 OS: Vista Home Premium 64-bit	Re: 8-pin to 6-pin adapter? Alright. I don't think I saw an adapter in my video card box, but I'll have to take another look. Thanks a lot guys :)

11-19-2008, 06:35 AM	#7 (permalink)
Gimp563 Registered User Join Date: Nov 2008 Location: Alexandria, MN Posts: 5 OS: Vista Home Premium 64-bit	Re: 8-pin to 6-pin adapter? I can't thank you guys enough for the helpful info. My 2nd video card should be here tomorrow :D

11-21-2008, 09:00 AM	#8 (permalink)
Gimp563 Registered User Join Date: Nov 2008 Location: Alexandria, MN Posts: 5 OS: Vista Home Premium 64-bit	Re: 8-pin to 6-pin adapter? Update on this: I received my video card in the mail today and they will not Crossfire. I installed the drivers and the option doesn't show up in Catalyst. I've been running about other forums looking for answers and apparently the 3800's don't Crossfire with the 4800's. I feared this was going to happen, but I had heard both you could and you couldn't, so I figured I would try for myself.

11-21-2008, 08:55 PM	#9 (permalink)
grimx133 Mentor Hardware Team Join Date: Jan 2008 Location: Canada eh Posts: 2,203 OS: xp mce sp2, xp pro sp2, windows 7 beta My System	Re: 8-pin to 6-pin adapter? You do have a bridge on eh? http://shop.ati.com/product.asp?sku=3186855 __________________