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Need a motherboard that supports 2x RADEON HD6850

post #1 of 16
Thread Starter 
Sorry if this is the wrong forum, just signed up and got kinda overwhelmed by the massive forum.

Anyway, I have a RADEON HD6850 graphics card on a Gigabyte GA-870A-UD3 motherboard and I've been told this mobo doesn't support SLI or crossfire.

Well I wanna play games like BF3 with more than 3 fps on max specs (bit exaggerated, haven't tried the fps yet, but I wanna get another 6850 anyway) so I'm gonna buy another HD6850 card to combine them with SLI/crossfire...
... Which means I gotta buy a new motherboard, and as I'm completely under the table on that subject, I'd really appreciate some help!

So, what mobo would you reccomend that would work with 2x Radeon HD6850?


Also, CUP-Z gives this info about my motherboard:
MOTHERBOARD
Manufacturer: Gigabyte Technology Co., Ltd.
Model: GA-870A-UD3
Chipset: AMD - 870 Rev. 00
Southbridge: AMD - SB850 Rev. 40
LPCIO: ITE - IT8720

BIOS
Brand: Award software international, Inc.
Version: F3d
Date: 08/05/2010

GRAPHIC INTERFACE:
Version: PCI-Express
Link Width: x16 Max supported: x16





Thanks!
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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post #2 of 16
I personally have the Asus 990fx sabertooth board and love it.
Jynx
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Jynx
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post #3 of 16
Thread Starter 
Quote:
I personally have the Asus 990fx sabertooth board and love it.
I looked it up, it looks sweet
Two questions though,

1, It says it has AMD 990FX chipset, will my current says 870, does this matter as I'm switching mobo or may this cause malfunction of other hardware?

2, It says it has three PCI-Express x16 "connections", does this mean you can somehow combine three graphiccards? Never heard of that, and if not, what is the point of having three of them?

Thanks for any answers
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
  hide details  
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CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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post #4 of 16
Quote:
Originally Posted by Kaninstek View Post
I looked it up, it looks sweet
Two questions though,

1, It says it has AMD 990FX chipset, will my current says 870, does this matter as I'm switching mobo or may this cause malfunction of other hardware?

2, It says it has three PCI-Express x16 "connections", does this mean you can somehow combine three graphiccards? Never heard of that, and if not, what is the point of having three of them?

Thanks for any answers
Not positive on the first question but from what I can tell there should be no issue.

On your second question, it has 3 PCI-e slots that can run at x16, x8, x8 when running 3 graphics cards or in your case 2 PCI-e slots that run at full x16 when running only 2 cards. You should have no issue with it just put them into the 2 full x16 slots and you will be good to go. Should tell you which in a manual.
post #5 of 16
Thread Starter 
Thanks alot! I'll probably buy it!
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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post #6 of 16
Thread Starter 
Since my graphic card has 1GB memory, crossing two of them would get me 2GB right?
Well I'm thinking of buying this card instead of crossfiring my current one with another.
ASUS RADEON HD6970 2GB DC GDDR5 PCI-E DVI/DP
http://www.dustinhome.se/asus-radeon...uct/5010550139
(sorry that it's in swedish)
Heard really good things about this card, and since it got 2GB memory too, would there still be any difference between using this one or 2x HD6850?
Because if I buy this one instead I can probably manage to sell my 6850 for a decent price and don't have to buy a new motherboard!

Thanks
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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post #7 of 16
heyy..wanna buy a sabertooth 990fx? hrmm.. i happen to have one..2 weeks old...for sale,even!.oh..and i've read on here that VRAM does NOT scale..sorry..
 
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Thuban Powah!
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post #8 of 16
if you CF 2 1 gb cards your VRAM will still equal 1 gb... sorry.
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post #9 of 16
Thread Starter 
Quote:
Originally Posted by Schmuckley View Post
heyy..wanna buy a sabertooth 990fx? hrmm.. i happen to have one..2 weeks old...for sale,even!.oh..and i've read on here that VRAM does NOT scale..sorry..
No thanks
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 Gigabyte GA-870A-UD3 AMD/ATi Radeon HD 6850 1024MB 4GB DIMM DDR3 1333 MHz 
OS
Windows 7 
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post #10 of 16
I would either crossfire the 6850's or wait for next gen if your getting by. My 6850's in xfire are amazing, and a good price/performance option.
 
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