I'm buying an used rx 570. I currently have a non branded atx power supply and my budget is currently 40$. which psu will be best for my pc?
Just an FYI, you should consider retiring that build since it doesn't have UEFI BIOS and anything new will have UEFI VBIOS meaning you're very likely going to see a black screen in spite of being able to hear your system boot to OS GUI.
You can only get CoolerMaster MWE450 V2 80+Bronze near to this price.. Its a decent Power supply.. I personally opened and tested each components.. Its Caps are Replaced from Good Quality Elites to Crapy Capxon... But remember .. CAapacitor is not the only thing with should be considered in a PSU.. Its design is modern.. and FETs are also fine.. Switching losses are not that much.. even at full load PSU runs cooler than Corsair VS450 and CV450 (Which is rebranded VS with minute changes in control circuitary...)
If you are in extreme Budget... Dont go below Coolermaster MWE450 V2 80+ Bronze.
Never said for 3070... as he is going to buy used RX570.. which means he is under budget.. as far as I know about Bangladesh's PC markets. there are not many options.. otherwise I don't recommend MWE450.. My personal choice for budget PSU is Corsair CX550F because of wide availability but its much more expensive as MWE v2 specially when we consider 50-70$ price point 10$ difference means 20% of price... and VS, CV are not as good as MWE v2 bronze.. according to my testing... so Thats why MWE 450 for a tight budget build.For an RTX 3070?