The Layout -
The layout of any motherboard is important. Even simple mistakes in component placement or the signal traces can cause major issued in performance and stability. With the ATX form factor we find that this is even more true; the devices we drop onto them demand more and cleaner power while the signal speeds push faster and faster.  I have said this before; I like the direction that Gigabyte is taking with their board designs. They are getting more stylish and starting to get out of the “mass production” mind set and really cater to the potential performance of a product. We are seeing this on multiple products from them and now get to see this translate over to the AMD 990FX. Of note are the new rounded heatsinks that help to maintain the board level cooling (a simple heatpipe system) This sits on a matte black PCB and is rounded out with all black peripheral slots (including the CPU socket). It is a nice effect.

But let’s not get ahead of ourselves. Starting off at our usual spot we see that new black ZIF socket (ZIF- Zero Insertion Force). This is right on the inside of the bank of four Dual Channel RAM slots. You can also see the 24-pin ATX power connector and if you look closely you can see some of the Driver MOSFETs that Gigabyte is using these days. Something else that is very nice (and different) is the new open cooler mounting hardware. In the past this was a closed piece of plastic. It was also a great way to keep a nice pocket of hot air around your CPU. By opening this up Gigabyte is allowing more cool air to flow around the actual CPU (which helps in more ways that just overclocking). The power regulation area is clean with a row of solid capacitors right in from of a row of ferrite chokes. (under the heat sinks are more driver MOSFETs which contain voltage a driver and two MOSFETs. These all combine to make up the 8+2 phase power system on the board (the +2 is for the RAM).  

There is a down side to all of this though. You see due to the space needed for the AM3+ CPU socket, the RAM and the power setup there is very little space for the 8-Pin Aux power connector. As you can see I was barely able to get my fingers around the header without a cable attached. Once you get this into a case it will be even more difficult.

Moving down the board to the peripheral slots; ok let’s count them out. You get the following;
1 x1 slot (Mechanical and Electrical), Slots one and three are x16 Mechanical and electrical when used together they still maintain x16 on both slots though (one runs off of the 990FX chipset and the other off of a bridge chip). Slots two and four are x4 electrical and x16 mechanical while slot five is x8 Electrical while showing x16 mechanical. For those of you looking to run three-way SLI or crossfire you will want to use slots one, three, and five. Gigabyte has thrown in a legacy PCI slot for good measure. Do you see that 108db label printed on the board? That is Gigabyte bragging about their 108db Signal to Noise ratio ALC889 HD audio CODEC they have thrown in.

Moving around to the front of the board we find a real USB 3.0 header right next to a header for a Trusted Platform Module. I have said this before and I will say it again; I am not sure why this gets put in. You cannot really buy these on the open market and it is doubtful that any OEMs will be dropping them in with a board like this so why not save space and tracing. The cooling here has been redesigned also. Again the edges have been rounded and lifted a little from the board. it gives it a sloped effect and also helps with heat as it rises and expands (giving it more room to do both and cool more efficiently).

The 990FXA-UD5 gives you the typical six SATA 3.0 ports along with two extra ports that are run by a Marvell 88SE9172 SATA 3.0 controller. This chip also controls a single eSATA 3.0 port on the back. The three ports can be setup to run as RAID if that is something you want.

Speaking of the back I/O ports we have arrived at them. Gigabyte offers you eight USB 2.0 ports, two USB 3.0 ports, a single PS/2 port, an eSATA 2.0 port, an eSATA 3.0 port, a 1394 port and the outputs for that ALC889 HD audio CODEC.

The layout looks clean and neat. There are also some nice components in the 990FXA-UD5. It should perform fairly well given what we are seeing here, but we won’t know that for sure until later.