My PC has 2 video cards (ATI Radeon HD 5750 1GB GDDR5 16X PCIe Video Card ) and my son notices that Shogun 2 lags on high settings. I was thinking about upgrading the video cards and want to know the pros and cons of using 1 card vs 2 cards.
Radeon HD 7970 for $430 (rated in this forum best PCIe card for $430)
2 Radeon HD 7870 in Crossfire for a total of $520
The "best Graphic cards for Sept 2012" on this site stated this about a single GTX 670 vs multi-card configurations:
The GTX 670 delivers such impressive performance under $400 that we find it hard to recommend higher-performing (but sometimes-inconsistent) multi-card configurations for more money. We'll call out some of the most promising options, though, especially for folks with one of these cards already installed: two Radeon HD 7850s in CrossFire for $410, two Radeon HD 7870s in CrossFire for $520, and finally, two GeForce GTX 670s in SLI for $760.
Is it correct to assume that I cannot use the GTX 670 since Nvidia does SLI and my motherboard does crossfire so the GTX 670 isn't relevant to me ?
Below is my configuration:
CPU : AMD Phenom™II X6 1090T Six-Core CPU w/ HyperTransport Technology
Hard Drive: 750GB SATA-II 3.0Gb/s 16MB Cache 7200RPM HDD (750GB x 2 (1.5 TB Capacity) Raid 0 Extreme Performance
RAM: : 8GB (2GBx4) DDR3/2000MHz Dual Channel Memory Module(Corsair or Major Brand)
7970 for sure getting the best single card you can is always the best option.
Cant go wrong with a 7970 a nice MSI model that supports 3x over-voltage will give you amazing overclocking potential.
Don't forget that in the future you can get another 7970 at a way lower price when you decide you need an extra boost in performance.
You can run a GTX 670, you just can't run 2 in Sli.
A single more powerful card is almost always better than a less powerful dual card setup. With a single card you don't have microsttutering issues and some games do not support dual card options so in some cases you could be stuck with using only 1 card anyway.