What video card to buy for about 6,000 rubles?

Question

Video cards

We need a very budget (6,000 rubles + - 1,000 rubles) gaming video card. I'm used to "beach gaming" when everything seems to be going on, but the lowest graphics settings are the norm. On the video card, the following games should start and run at least at cinematic 24 frames per second with possible periodic freezes:
DOOM 2016
Prey 2017
Well, ideally, everything for the next 5 years :)
For now, I chose the Radeon RX 550 2 GB as my favorite, but only from MSI or ASUS (because only these manufacturers support Vulkan 1.0, but I tend to ASUS more, because it is not overclocked, which means it will probably live longer)
I considered the option with the Radeon RX 460 as more productive, but the OC label (overclocked by the manufacturer) was embarrassing, and now I completely decided to abandon this option when I found out that it had compatibility problems with old mats. boards with PCIe 2.0.
He also abandoned many models because of the bus width of less than 128 bit or the effective memory frequency of less than 7000 Mhz. I'm not a big expert in frequency and bandwidth surveys, but there are some "prejudices" according to which I think that this is very, very important. So if you understand and I in vain hack options with less frequency - enlighten me.
Mat. Board: GigaByte P41T-D3
CPU: Intel Pentium Dual Core E6600 3.03 Ghz
RAM: 4GB (will not accept mother anymore)
PSU: 450 W
Don't offer b. u., do not offer too rare or old models that are not currently on sale.