Originally Posted by Thrillho
Keep an eye on your local used market. Older GPUs don't really hold value. I just grabbed an R9 270 for $100CAD (What's that, like $12.75USD now?). It let's me run most everything maxed in MadVR except Luma and Chroma Doubling.
I agree that an R9 270/270X or 7850*/7870 is a great idea. I got a used 7870 for $80 about 4-5 months ago and I'm surprised how close it is in performance to a 7950/R9 280 (which I have in another machine). I don't get the obsession with OP and a 750 (Ti). 750 Ti, IMO, is a "never was" card. For most of its life it was around the same price as a 270 and the 270 is a much faster card. The only real benefit it has is lower power consumption. Admittedly that may be a concern for the OP but still I never understood why people bought the 750 Ti. To get 7870/270X performance you needed to buy a GTX 760 and I've barely ever heard of anyone having bought one of those, likely because it was more expensive for the same performance.
I agree with the other guy about getting a GTX 950 instead as well. I mean it's a bit more money (and a good bit over a used 750) but really if buying new you might as well go for a 950 which is slightly faster than a 270X, uses much less power, and supports HEVC and HDMI 2.0/HDCP 2.2. But if buying used a Pitcairn card (7850/7870/265/270/270X) is a better buy--you're likely getting this at the same price as a 750/750 Ti and these are all faster GPUs. I'm not 100% sure about the performance in madVR TBH, but unless someone can say a 750 is faster than Pitcairn at madVR I'm going to err on the side of the fact that Pitcairn is much faster as a GPU otherwise so it should hold true in madVR.
In other words, if buying new, spend the extra and get a GTX 950. If buying used, get a Pitcairn card as they are better value (but do use more power). The 750 just always posed a poor value proposition to me whether new or used.
*Note that a 7850 isn't equal to a R9 270; a 270 is essentially a clocked-down 270X/7870 while a 7850 is a cut
-down 7870, and is equal to a R7 265 or R7 370. And yes that means an R7 370 is actually worse than an R9 270 because AMD pulled a fast one there
R7 370X is the same as an R9 270X though.
Originally Posted by Dark Eyes
I think I am also a bit limited by my 380W power supply, as it has 6 HDDs to power, and all the usual PC electronics. A higher spec card with a fan draws a significant amount of power under load, and the fans will probably be noticeable under load.
Granted, with such a [relatively] low wattage PSU, a 750/Ti would be more acceptable at just 60W. However depending on what you have available on the 12V rail(s), you might still be able to squeeze something like a 270 in there, at 150W.
Originally Posted by Dark Eyes
P.S. $100CAD is about $72US or £50 to me.
I think he was more joking about the fact that the CDN dollar v. the US has slid quite a ways. After having a near-par dollar for more than half of the last decade, it's come down in the last year or so...to the point where it's been as bad as $1.50 CDN for $1 US. As for comparison to UK, well there you have the problem that things are typically more expensive in the UK--I'm betting you'd never find a used 270 there for as low as 50 pounds?