Video Card upgrade for Early 2008 MacPro III
I'm looking to upgrade the stock video card in my Early 2008 Mac Pro (2x2.8 GHz Quad-Core Xeon, 14 GB RAM, ATI Radeon HD 2600 XT 256 MB graphics, running OS X 10.9.3). In reading the posts here and elsewhere, it looks like a PC card like one of the two below would work and would meet my price requirements ($200 or less). I know that the non-Mac cards won't show the boot screen, and that does not worry me as I will keep the old card for emergencies. I'm interested in faster graphics performance overall and in online games.
I have narrowed my options down to two versions of the GeForce GTX 660 available on Amazon:
#1: Gigabyte GeForce GTX 660 OC 2GB GDDR5 PCI-Express 3.0 DVI-I/DVI-D/HDMI/Displayport SLI Ready Graphics Card GV-N660OC-2GD
#2: EVGA GeForce GTX 660 SUPERCLOCKED 2048MB GDDR5 DVI HDMI DP Graphics Card 02G-P4-2662-KR
In reading the reviews on Amazon, I like #1 better because it seems to have a better, and most importantly for me, QUIETER, cooling fan system. My questions are:
Will both of these cards work?
Any preference between them?
Any issues likely with power supply or back-compatibility of the PCI-e 3.0 card with the PCI-e 2.0 slots?
Any other suggestions?
OS X Mavericks (10.9)