Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
^this and sell the free gameThe MSI 760 OC Gaming Edition is on offer at the moment for £169.99, that seems like a pretty good deal.
There's not arguing about the efficiency of the 750Ti, but it is a bit underpowered for demanding games, with it being slower than even the GTX650Ti Boost 2GB and HD7850.Should the 750Ti be considered?
For a Corsair 250D case, I'd try to get a 2nd hand Gigabyte GTX670/GTX680 Windforce (with 3 fans, so run at a lower rpm) which can draw cool air directly from air-vent on the left side-panel, a low-profile CPU cooler for the CPU (so it doesn't block or take up all the space at the main chamber), and then with two 120mm on right side-panel and two 80mm fans at low rpm as exhaust to remove the heat from the case.It will be going into a Corsair 250 it has been decided.
Not if you have them at lower rpm. More fans would mean you can achieve the same cooling capable without as aggressive rpm (which is the biggest contribution to noise). But I guess you could probably do without the two rear 80mm fans and rely on just the two 120mm fan on the right-side panel as exhaust should still be more than sufficient. I don't think the fan noise level would be an issue as long as you keeping it at no higher than 800-900rpm. If you are not going to install a DVD-drive, you might considering getting a low cost fan controller such as this:8 fans will be a bit loud surely?
To run arma 3, BF4 occasionally, etc.
I want to downgrade from my 690 (and huge PC) into a small, efficient, silent system.
Im not sure arma favours amd over nvidia at least ive never heard of this.
The wf cooler is extremely good, using the stock auto fan setting on a wf 670 i had. I never seen it go over 67c despite it running with a very high oc of +130/+760, this was in a bitfenix shinobi xl which had virtually zero front air intake due to its front panel design.For the Windforce cooler, it would probably keep a stock GTX670/GTX680 at no more than around 60C under load using a reasonable custom fanspeed profile, but for you situaton you would most probably need it to be quieter than that, so you can set the profile to have the fan at even lower speed, aim at not exeeding 70-75C should be more than fine.