you can use 9 series cards in them, the ufei is mostly so secure boot will work. 
as for over clocking there are tons of guides for that, look at the straps chart. 
 
when i was on that board i used a 450 FSB with a 7.5 multiplier. you may need to twiddle with the voltages and other settings also.

You many want to consider some of the cards listed here.

RICHJR
Do you have a specific GPU in mind ?

How about a GTX 690?

Thanks for all the help you fine folks have provided.
 
I've come to a conclusion that the 790i FTW  is not worth the hassle. It does not like any of my AMD gpu's and it won't work with my MSI GTX 970 Gaming 4G or the MSI GTX 970 OC version.
Thought about getting a GTX 670 or GTX 680 but figure it would be a waste of money. After all nVidia Chipset on the mobo is made for nVidia gpu's and to SLI.
 
I'll probably keep the Gigabyte GA-EP45-UD3P motherboard.  Also my Gigabyte GA-X48T-DQ6 as it will run with the MSI R9 280x card and both MSI HD 6870's. The X48T won't OC with the G.Skill DDR3 2000MHz (4x2GB) as XMP or manually to 2000MHz caused the mobo to cycle on-off. Also  FBS at 444 was the highest it would go without getting DUMPS.
Setting FSB to 450 or 500 were No-Go's.
 The Q9650 cpu @ 3.6GHz (9x400) not the Extreme Quad and Memory at 1600MHz seems to work well. After all the X48 chipset was made for AMD gpu's.
 
Leaving the Patriot DDR3 1600MHz (4x8GB) and QX9650 @ 4.0GHz which is the Extreme Quad in the in the EVGA 790i FTW and may sell it off as to let someone else have nightmares. The worst part of the motherboard is the SPP (Northbridge) fan as it runs at full RPM and it's loud. Let someone pay for a nVidia gpu that will function well with it.  AMD gpu's sux with the 790i FTW.
 
At least through the hassle , I've got a Strapping (FSB DRAM and FSB CPU) Chart to work with and finding out that the 790i FTW Post Code Display that "FF" means that the motherboard is All Good and set to go forward.  Even though many times Windows OS would not load up. Read that the 790i FTW does corrupt Hard Drives and this one here is no exception to that rule. But it did not help trying to use AMD gpu's either. 
 
We learn something new every day !
 
Have Fun and don't give up hope  ... better days or crazier ones are ahead.

Thanks!  
 I've read a lot about evga 790i FTW and Ultras with instant FF and no other codes that it may mean your motherboard, gpu, power supply, memory could be at fault. Worst scenario is a bad motherboard or that you some how shorted out the mobo circuit to your case. (darn it,  that screw I was looking for and couldn't find - well it let me know where it's at now ... and it fried my mobo.)
 I find that increasing FSB (aka base clock) so you can Over Clock while keeping your CPU Multiplier down doesn't really work great. Often there are dark holes or dead zones in the FSB (a range) that just won't allow you to operate within.
 I'm using the MSI R9 280x on my Gigabyte GA-X48T-DQ6 mobo and runs like a champ. The evga 790i FTW just hates booting to windows with it installed. nVidia mobo more persistent wanting to use nVidia gpu's as it is designed for.
X48 is for AMD gpu's and only able to do Crossfire and not SLI whereas 790i FTW is for SLI and won't do Crossfire.
 
If interested what I use now.
 My March 2016 rig.  runs CPU@ 4.5GHZ and mem@ 2800MHz  (easily done Auto CPU increase and memory are XMP) with UEFI BIOS so simple that we all do the KISS. "keep it simple stupid".
LEPA Lenyx  LPC801 full size tower
Gigabyte GA-Z170X-Gaming 3
Corsair RM850i
2- MSI GTX 970's in SLI
Adata XPG Z1 2800MHz DDR4 (4x8GB)
Intel i7-6700K 
Corsair H60 v2 CPU Cooler
Corsair SP & AF 120 Quiet Edition fans
2 - Samsung EVO 850 500GB SSD
Samsung M.2 256GB SSD
Toshiba 2TB HDD
Windows 10 Pro 64bit and Windows 7 Ultimate 64bit
Logitech Internet Keyboard from 2008
Logitech G7 Gaming mouse from 2008
Logitech - sound bar speakers/ USB Hub Speakers from 2008
ACER P243w  24inch 2ms LCD monitor  from 2008
Linksys AE2500 Wireless-N USB Network Adapter from 2012
To hear my PC running you have to place your ear within 8 inches away from the tower as
sitting in front of the monitor if it wasn't for the Blue LED Power On indicator you'd swear it was off.
When gaming still difficult to hear it. The only games I play (WoW but quit in 2009 cause tired of paying monthly Fees to Blizzard, Diablo 3 but quit in Dec. 2016 cause Seasons are boring and tired of same ole grinding, and MSN Internet Spades a favorite card game).
Main use is browsing internet, researching for information, How to Fix something by watching various You Tube videos, email, paying bills,
keeping tabs on my daughters school grades, Map Quest/ Google Maps, wife's on-line training courses, sports and weather, torrent downloads for TV shows and Movies, Skype while daughter away at college, ordering a few things from Amazon or eBay,  also Genealogy research and pictures.
Watching ESPN3 Sports - college games for free ...   Haven't had Cable TV in 27 years or since 1989.  One day I might have to get cable tv when you can't watch stuff from the TV Network websites or find them on You Tube, Hulu or Torrents.