[ Register or Signin to view external links. ]

That's a pretty poor choice. The 660Ti is almost 3 years old now and if you have enough money to SLI two 660Ti's, you should be able to buy a more recent, higher end GPU. Also, running two low-end GPUs in XFire/SLI is a bad idea.

save up for a decent gpu like this one: [ Register or Signin to view external links. ] or this [ Register or Signin to view external links. ]

660ti is an old GPU ? Yes but it can still run everygame to date with medium settings to high and gets +45 fps, what much could you ask for ? I play csgo and have been huge fan of the witcher series since 2007 and this gpu can run witcher 3.

And to clear things up the 66ti 3gb sli is equivalent to a 760ti
Also I and not going to SLI YET as I only have enough for one 660ti 3gb.

destroyer89 wrote 660ti is an old GPU ? Yes but it can still run everygame to date with medium settings to high and gets +45 fps, what much could you ask for ? I play csgo and have been huge fan of the witcher series since 2007 and this gpu can run witcher 3.

And to clear things up the 66ti 3gb sli is equivalent to a 760ti
Also I and not going to SLI YET as I only have enough for one 660ti 3gb.

There is no 760Ti. The GTX 760 out-performs a 660Ti. 660Ti is almost 3 years old so due to rarity, they'll be more expensive than newer, better performing cards most likely. 660Ti is a low-end card, you shouldn't run 2x low-end GPUs together. You should XFire/SLI higher end cards. How much are you paying for this 660Ti?

90 pounds not sure what that is in dollars

660Ti is going to perform similarly to an R9 270. You can get a brand new 270 for £110. I'm assuming the 660Ti you've found is used?

So would this be a good buy ? [ Register or Signin to view external links. ]

No.
[ Register or Signin to view external links. ]
285 out-performs 760. Better cooler, and it's brand new.