Hi there, I'm quite new about nyoc mining. I've been mining on Genesis for quite sometimes, and now I want to mine with my own rig.
For the last 2 days, I've mine with my rig (i3, R7 260x, 8 gb RAM, and VS 450 power supply).
And today, my R7 260x making some kind of ripple on my monitor, when I detach the card and let it rest for a while, the card getting better, and when I re-attach it the ripple goes away (make it back to stock clock) and I checked errors for artefacts and nothing detected (and I see no artefacts as seen on website - I forgot the web). What I did: I overclocked the card with 450W power supply, and make it run mining 2 full days. The ripple is gone, but the temps go higher from before. I did some research and I think my PSU is not capable to do the job.
In somedays I wanna buy 1 HD 7950, and I want to replace my PSU with something better.
I've got some good deals on secondhand PSU. Here is the list:
XFX XXX 650W
Corsair VX 550W
Seasonic M12 II 620W
Corsair HX 650W
all of them has been used for around 4 years except the seasonic one, its only been used for around 3 years. The prices are around 50$ each.
So here is me questions:
1. Are that PSU are good? And which one should I take?
2. Is there any other suggestion? Those PSU are based on tomshardware PSU tier, and Im choosing the one with tier 2 or maybe 1 if I can get one. The budget is around 50$.
3. Should I get higher PSU watts for future upgrade on my gpu or should I get the one that can handle 1 gpu first, and consider the upgrade on my psu later when I will get my second gpu?
Thank you in advance