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Tom's Hardware > Forum > Motherboards & Memory > Motherboards > [Solved] 990fx, 990x, or 970?

[Solved] 990fx, 990x, or 970?

Forum Motherboards & Memory : Motherboards [Solved] 990fx, 990x, or 970?

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Andriko_08   09-05-2011 at 07:18:49 AM

Hi, I am expecting to be upgrading to bulldozer soon, and I'm not quite sure which kind of motherboard to get.

I will overclock and I will have 2 5870s in crossfire

Do the chipsets give anything else other than pcie lanes?

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beenthere   09-05-2011 at 08:18:36 AM

Yes it's X16 x 2 vs. X8/X4 and an extra PCI slot and SLI of course is activated on all 990 chipsets.

http://www.nordichardware.com/news [...] ailed.html

Reply to beenthere
abekl   09-05-2011 at 09:29:40 AM

You want the 990FX chipset. It only costs a few dollars more, but it's worth it in the increased functionality you get.

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Dngrwtch   02-04-2012 at 08:22:16 AM
Best answer

I know its an old thread, but I have to note that according to the specifications the PCI-E slots on those mobos are set up like this:

990fx - x16,x16,x4 (dual x16 for Crossfire/SLI)
990x - x16,x8,x4 (x8 x8 for Crossfire/SLI)
970 - x16,x4 (x16 x4 for Crossfire/SLI)

Not 100% sure about the 3 way Crossfire/SLI, but I think its something like this:

990fx - x16 x8 x8
990x - x8 x8 x4
970 - N/A

-- Personally I would suggest the 990FX as well. You can geta really nice BioStar 990FX mobo. Thats only ~$30 more than the 970 series mobos, and you get so so much more.

(Biostar 990fx mobo link -http://www.newegg.com/Product/Prod [...] 6813138341)

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