I'm confused. What's the difference between these motherboards? I see some differences between the number of GPU PCI-express slots but what else?

Which one I should choose? I want to be able to run Crossfire x2, that is a total number of 2 GPUs but no more. No overclock of CPU.

What else features do they have? Connections to external devices?

Gigabyte GA-970A-DS3P, Socket-AM3+

ATX, 970+SB950, DDR3, 2xPCIe-x16, CFX, SATA 6Gb/s, USB 3.0, UEFI

(1)

679:-

RAM som stöds

Ljud

LAN

Expansion/Anslutning

Egenskaper

Diverse

--------------

Gigabyte GA-970A-UD3P, Socket-AM3+

ATX, 970+SB950, DDR3, 2xG2-PCIe-x16, CFX, SATA 6Gb/s, USB 3.0, UEFI

799:-

RAM som stöds

Ljud

LAN

Expansion/Anslutning

Egenskaper

Diverse

-------------------

Gigabyte GA-990FXA-UD3, Socket-AM3+

ATX, 990FX+SB950, DDR3, 4xPCIe(2.0)x16, CFX&SLI, SATA 6Gb/s, USB 3.0,FW, REV1.1

(8)

1.079:-

RAM som stöds

Ljud

LAN

Expansion/Anslutning

Egenskaper

Diverse

--------------------

Gigabyte GA-990XA-UD3, Socket-AM3+

ATX, 990X+SB950, DDR3, 3xPCIe(2.0)x16, CFX&SLI, SATA 6Gb/s, USB 3.0, FW, Dolby

(5)

949:-

RAM som stöds

Ljud

LAN

Expansion/Anslutning

Egenskaper

Diverse

What kind of CPU are you looking for?

AMD FX-8350.

I'm really out of the loop but generally motherboard doesn't matter a whole lot. Look for connectivity and maybe overclocking capabilities, and that's about it. Well, naturally CPU support must be checked too. Of course if you want to run two graphics cards, you'll need to see if the mobo supports SLI or CrossFire. Other than that, not a whole lot comes to mind. Choose the cheapest one that suffices, and by a quick look, the first one is exactly that.

Yeah Im thinking that too, but when I was about to click the order button I started to think what if I'll miss something useful in the more expensive motherboards.

The cheapest has 2 PCI-E slots as far as I can tell and thus should be enuff fore me, but I'm very unknowledgeable about modern features of mothaboards such as blue-tooth stuff (I never understood what is Blu-tooth and Wifi and all that stuff), connection to external.... stuff... what are those cards called, when you can put a little card in the computer, like a card reader or something?

For starters, the 2 boards with the 970 chipset only have 1 electrical x16 PCIE, so none of them are good if you plan to go with 2 graphic cards. And they have differences in the Audio chip and number of USB ports, as well as one having  connections for both PS/2 keyboard and mouse while the other only has room for one.

Check the comparison http://www.gigabyte.us/products/comparison/list.aspx?ck=2&pids=4717,4591

Regarding the 990, the 990FXA has 2 x16 PCIE slots while the 990XA has one x16 PCIE and one x8 PCIE, as well as having an extra chipset that gives it another 2 6Gb/s SATA ports... on the back.

Check the comparison: http://www.gigabyte.us/products/comparison/list.aspx?ck=2&pids=4672,3901

And here, the 4 cards compared: http://www.gigabyte.us/products/comparison/list.aspx?ck=2&pids=4717,4591,4672,3901

To summarize, get one of the 990 mobos if you want to go with 2 cards as having 2x16 or 1x16+1x8 will have little effect.

Can't really say a whole lot because, again, I'm really out of the loop, but I think all of the stuff you mentioned you can get as USB peripherals. Bluetooth is used to connect devices to one another on short range, for example cell phones to computers and vice versa, or console controllers to consoles. I bought a USB stick for this years ago, cost like $5 I think. Wi-Fi = WLAN, and you use to to connect wirelessly to the internet; to be precise, it creates a short-range connection to a wireless router (or modem, I think), which in turn has internet access, and this allows you to connect to the internet. Again, there's USB sticks for this, and I don't know if they're still common but I have a PCI WLAN card in my PC. And finally, if you're talking about memory card readers, I'm pretty sure you can get those in USB form too. Basically any basic peripheral you can get in USB form.

As for other concerns, if I had to guess, I'd say you're pretty safe if you're getting a motherboard that supports dual graphics cards. Those things are for gamers, and for gamers, you don't sell crap (pardon my French). I suppose technically you might be interested in things like Firewire (if that's even a thing anymore), but you probably know already if you need it. Have a printer etc.? Check what it uses.

So the cheaper 990 is good enuff to run two R9 290s in Crossfire? The weaker GPU slot will not bring down the perfromance?

Btw, can I combine a R9 290 with a next gen AMD card (a future 380 or something) or do they still need to be two cards that are exactly the same?

Okay cool. What about wirless routers? Which one should I buy? I had one in the past and it wasn't reliable.

What's Firewire?

Will this memory work with that mobo and FX-8350 CPU?


Crucial DDR3 BallistiX Sport 16GB KIT
16GB kit (8GBx2), Sport,1600MHz, 1.5V, CL9-9-9-24
(1)
1.299:-