Which one to buy?

You think correctly that you want to replace the vidyahu. I advise you to take one that is at least 4 gigs. It would also be desirable to have 16 GB of RAM, but here you did not give information, so I do not know how you are at the moment.
And by the way, I have approximately the same computer, only vidyaha of an older model but for 2 gigs. I played the witcher and folich at minimal and low resolution, but in principle it is playable.

Wait for new video cards from AMD, such as RX480.

Keltkelt Prots is
good, you can safely sit on it for a couple of years, but take a vidyuhu 1070 or if you have very little money wait for Polaris 480, 970 now it makes no sense to take it.

Off topic, but ... Strange. I have 4GB of RAM, Xeon X5460 and 560 Ti. The Witcher played at medium-high (1920 x 1080) at a stable 30fps.

There are 2 ways - take 970 from your hands, for example, at a very good price, or wait 480 from AMD, just for the case of a small amount of money.

Keltkelt Would
n't it be easier to dig up and buy a neref 1080GTX and, of course, wait a bit until it fully enters the market, so that it costs less?

PG_CrazyPunk
Why did you come to this thread? this card does not pull the average high witcher of 30 fps, some schoolboy will always come in and start telling everyone how he plays on an ancient wretched card at "maximum speed" her lot is all at a low 25 fps

If you're all so stupid, I'm sorry. There are a lot of these channels with all sorts of assemblies and reviews on YouTube ...

Kryogen Um
, okay, I 'm leaving . The student failed to convince a knowledgeable person. But you, look, if anything in Google, how 560 Ti works in The Witcher. Good luck with your purchase.

I will tell you about the used account.
If you take it, firstly, you can ask to pass it to the service, where it will be tested and a conclusion will be made. Secondly, some video cards are sold with a guarantee (find out the guarantee store, in large outlets you can hand over / replace them in case of problems, check the seal, if any), 2-2.5 years, of course there are also less, but 1.5-2 years already fine. Thirdly, choose a reliable manufacturer, for example MSI (they recognized the noise of the throttles, as a marriage and the GTX 1080 seemed to be "sorted out"), on the second EVGA and ASUS.
Dealers sell gtx 980 gaming from second-hand, like they ask for 30,000, from hand to hand you can get it cheaper, and for 26-28 thousand. On it, folich 4 at 50-60 fps goes, the Witcher 3 at 40-45 fps is easy, of course it's all at the maximum, also GTA 5, 30-35 in the city, above 45 outside the city.
Of course, the best option is to take 1070, it is on a par with 980 TI, while cheaper, 40-45 thousand are asked. New is of course always better. But 970, 980 are still pulling well. For 980 from MSI gaming series I can say for sure, I sat on it for a year, replaced it with gtx 1080, I'm waiting when it comes.
At the expense of 4 GB, the guys are talking, now this is the norm, although the 1070/1080 already has 8 GB, I suspect that games, memory eaters are coming ...
On the dns forum you can find interesting information for yourself, and the conclusions:
For examplehttp: //club.dns-shop.ru/forum/? P = 0 & action = thread & id = 120561

You can put almost any card on this pitch, except for 2-level amd, perhaps.
the question of the current is the lope itself, the desire to spend money and how much is the desire to get the grafon.
970 in 1080p resolution should by and large be enough for both f4 and vicner 3 in the performance range of 30-60 fps at maximum settings.
it is also desirable to increase the memory up to 16 GB

Keltkelt
Replacing the core only with the i7-6700K will give an increase in most games. Or as an option - look for an older (and cheaper) percentage with overclocking.

Friends, thank you all for the tremendous answers! I decided to wait for RX480, but for now I will go through the whole series of Foul again.

PG_CrazyPunk
with 1 gigabyte of video memory and a 256-bit bus, the Witcher 3 will not go for even medium, let alone high, and even more so in Full HD resolution.
I myself have a Radeon R9 270 2 gigabytes with a 256 bus on the outrageous 20-30 frames rarely rises to 40 (the rest of the hardware, if important, then 8 gigs of RAM percent i7-6700K 4.0 GHz (and percent does not play a special role in frames before that was percent Phenom II x6 6 cores 3 GHz each and the number of frames was the same as with i7 forgot to say about the monitor resolution no more than 1280x1024)). So do not be fooled by a video card with 1 gigabyte of memory, at best, run The Witcher at low and at most 20-25 frames in Full HD resolution.

Keltkelt
If still relevant, then gtx 1060 or rx480

People tell me which card will fit my computer, here are the links:
http://hard.rozetka.com.ua/asus_strix-r7370-dc2oc-2gd5-gaming/p3527740/#tab=characteristics

http://hard.rozetka.com.ua / msi_r7_370_gaming_2g / p3535496 / # tab = characteristics

http://hard.rozetka.com.ua/sapphire_11240_12_20g/p7250980/#tab=characteristics

and which one is better?

my Amd phenon 2 x4 b55 3.30ghz, motherboard Asus m5a78l-m lx, 8gb ram, power supply 400w, 500gb,

for games, 1920x1080

i7-3770k 3.5 Ghz, currently there is an ATI 7870 2Gb video, which video is the best to put in terms of price-quality ratio?
PS monitor 1680x1050, I'm not going to change, everything suits

Great warrior
Your percent is so old that few games will pull.