XFX R9 390x not running on Thermaltake TR2 600w? Old R9 270x wont run either now.

Damienhamburger · Oct 26, 2016

So i upgraded my pc from my old R9 270x to a new XFX R9 390x.

I uninstalled my drivers for my R9 270, and plugged in my new 390x, but i got a black screen (no input) and my gaming keyboard and mouse LED's arent working either.

I figured its my POS PSU. (Thermaltake TR2 600w) I know thermaltake makes some bad PSU's.

But now my old R9 270x isn't running either. How could that be? My computer, Keyboard, and mouse run fine when im hooked up to my MOBO graphics.

The R9 270x and R9 390x Fans are running as well.

Can someone give me some pointers?

SPECS:
(GPU)
I5-4460k
8GB DDR3 RAM
1TB Harddrive

Sam Hain · Oct 26, 2016

http://www.realhardtechx.com/index_archivos/Page362.htm

700w for that GPU (recommended) and one 6-pin and one 8-pin connector but a 600w-650w "should" get you by, as long as nothing is OC'd. Try reseating the GPU AND connectors, inspect your motherboard/PCI-e slot as well and see what happens.

People usually skimp/go minimalist/lower quality choices on their PSU (not knocking you) and should bump up on the watts a tad; http://textuploader.com/5ef9y Good Info here (courtesy of MeanMachine41)

Also, your GPU could be at fault here, even though it's new...

blazorthon · Oct 26, 2016

When it comes to what kind of PSU you want, you should really bump your PSU up by 50% to 100% of how much power the computer is supposed to use. Running a PSU anywhere near its upper limit causes it to degrade much faster and run with lower efficiency than it would if it has a 50% to 75% load on it.

So if you have a computer that uses about 400W, then you want a 600W to 800W power supply, which fits nicely with a 650W model or a 750W model.

Don't look at what a recommended PSU for a given graphics card is. That is beyond inaccurate and a useless number because you don't then know how much power the rest of your computer uses and the number that someone estimates may be far from what your computer will use. What matters is how much your computer uses and how much headroom you want over it.

Again, I recommend at least 50% and at most 100% headroom over what the computer will use. If you don't know how to estimate that yourself, you can use a power supply calculator or make your part list on pcpartpicker.com to get an idea of approximately how much power the computer will pull under load.

If both graphics cards don't work anymore, then your PSU might be failing. It's also possible that both graphics cards failed, but that's not likely to happen unless the PSU is faulty anyway. What are the rest of your system specs and how old is the PSU (and exact model)?

Sam Hain · Oct 26, 2016

blazorthon :

When it comes to what kind of PSU you want, you should really bump your PSU up by 50% to 100% of how much power the computer is supposed to use. Running a PSU anywhere near its upper limit causes it to degrade much faster and run with lower efficiency than it would if it has a 50% to 75% load on it.

So if you have a computer that uses about 400W, then you want a 600W to 800W power supply, which fits nicely with a 650W model or a 750W model.

Don't look at what a recommended PSU for a given graphics card is. That is beyond inaccurate and a useless number because you don't then know how much power the rest of your computer uses and the number that someone estimates may be far from what your computer will use. What matters is how much your computer uses and how much headroom you want over it.

Again, I recommend at least 50% and at most 100% headroom over what the computer will use. If you don't know how to estimate that yourself, you can use a power supply calculator or make your part list on pcpartpicker.com to get an idea of approximately how much power the computer will pull under load.

Well stated!

Damienhamburger · Oct 26, 2016

Yeah so i went into the BIOS and unchecked Boot Support and checked Legacy Mode and it started right up.

Also i know this PSU is shit lol.

My new 700W EVGA Gold PSU is on its way!

Thanks guys.

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XFX R9 390x not running on Thermaltake TR2 600w? Old R9 270x wont run either now.

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