If I were to make a jump from the gtx 460 to 670 how big of a difference would it make. And would the 4gb vram model be of any benefit to a single monitor gaming setup over the 2gb vram model. From what Ive heard the extra vram is only useful in nvidia surround.
There are actually two monitors hooked up to the card but only one is used for gaming.
Here are my system specs.
MS Windows 7 64-bit
Intel Core i7 960 @ 3.20GHz 71 °C
Bloomfield 45nm Technology
20.0 GB Triple-Channel DDR3 @ 530MHz (7-7-7-20)
EVGA 131-GT-E767 (Socket 423) 59 °C
Acer H274HL (1920x1080@60Hz)
1024MB GeForce GTX 460 (EVGA) 45 °C
488GB Western Digital WDC WD5000AAKX-001CA0 ATA Device (SATA) 33 °C
ATAPI iHAS424 B ATA Device
SB Recon3D PCIe
Jumping from a 460 to 670 will be a massive jump in performance. I had a 6970 before my 670 and even then, the difference in performance is night and day in the newest games out there. Depending on what you'll be doing on the second monitor, the 4GB version of the 670 can either be worth it or not worth it at all. Personally, I would stick with the 2GB version and save a bit of money to got towards getting a higher end 670 such as the Gigabyte Windforce version or MSI Lightning version, which are two of the best you can get. As I always say, it's all up to you and your gut.