I am about to buy a graphics card for my newly built pc and was wondering if I should get an EVGA GTX 670 or GIGABYTE GTX 670. I heard that the gigabyte 670 is quieter and has a longer pcb. Which one would be better and what are the advantages of having a longer pcb and stuff?
Get the EVGA GTX 670 FTW, it's a bit faster than a reference GTX 680 in most games and certainly the Gigabyte GTX 670 out the box. It uses the GTX 680 PCB and has 8 phase VRM for better OC then the Gigabyte card. It's also cooler than reference GTX 670's and would only be a few degrees warmer at full lad over the Gigabyte card. If you ever decided to put waterblocks on this card, the GTX 680 waterblocks would fit it because it uses the GTX 680 PCB. It's only $410 and is just about as fast as the ASUS GTX 670 DCII TOP while being cheaper. EVGA has hands down the best customer service too. It's binned too, hence the FTW standards.
My EVGA GTX 670 FTW does not go above 70C during intense gaming on 64 player multiplayer BF3 servers. Since I have VSYNC on, it always stays at 60 FPS even when explosions are going off in every direction. I game at 1080p on my 40" Sony Bravia HDTV, screw a tiny 27 inch monitor, lol. Just my choice of display, have all my consoles, PC and TV all in one.
I have 2 of the EVGA FTW GTX 670 cards in SLI and I'm a fan. They're not too noisy and run fairly cool even on the highest games settings. Metro 2033 causes them to run a little hotter than most games on the highest settings, but the heat and noise levels are still quite aceptable. The EVGA warranty and customer service is very good. They ship extremely fast and keep you informed of rebate status very well, etc. I bought mine direct from EVGA.
I can't speak to the other brand you are considering, just sharing my experience with the one I'm familiar with.
I have the gigabyte and highly suggest is the 3 fans and it is on a 680gtx board so it has higher voltage regulation also one 8 and one 6 pin so it can use more if it needs more. It is quiet very easy to o/c and have had no issues.