Can a pci express 3.0 GPU be run on motherboard with PCI Express 2.0

[Javier_8]

I am trying to run my r9 380x on MSI 970A-G43 , with a 600W Zumax PSU 80+ Bronze , my r9 380x have a pci express 3.0 while my Motherboard have a PCI Express 2.0 , sometimes it wouldnt turn on, sometimes it started the PC fans but not the GPU fans.
I have tested the GPU in my friends house with a 500W FSP Power supply and a mini atx motherboard and it works for about 2 hours then overheated and shutdown.
I dont know what is needed to solve the problem, the Motherboard, the PSU or the GPU itself is the trouble.

Thanks For Helping!

 

[Phillip Corcoran]

PCIe 3.0 cards are fully compatible with PCIe 2.0 slots so that's not the issue.

I reckon it's that cheap & nasty Zumax PSU you're using, it's probably not even 600w even though it's marked as 600w.

See this thread:

http://www.tomshardware.co.uk/answers/id-2683501/trust-zumax-psu.html

You need to replace it with one of the recommended brands in that thread.

 

[DRagor]

Is that your PSU: http://zumaxpower.com/products/zu600w.htm ?
If yes, then I would suppose this unit is not good enough for your GPU. r9 380x needs 500 W unit minimum, and yours is only 480 W at its max.

 

[Javier_8]

PCIe 3.0 cards are fully compatible with PCIe 2.0 slots so that's not the issue.

I reckon it's that cheap & nasty Zumax PSU you're using, it's probably not even 600w even though it's marked as 600w.

See this thread:

http://www.tomshardware.co.uk/answers/id-2683501/trust-zumax-psu.html

You need to replace it with one of the recommended brands in that thread.

So you are saying that Zumax PSU is not a pure PowerSupply as there might be lots of power loss?

 

[bjornl]

PCIe 3.0 cards are fully compatible with PCIe 2.0 slots so that's not the issue.

I reckon it's that cheap & nasty Zumax PSU you're using, it's probably not even 600w even though it's marked as 600w.

See this thread:

http://www.tomshardware.co.uk/answers/id-2683501/trust-zumax-psu.html

You need to replace it with one of the recommended brands in that thread.

So you are saying that Zumax PSU is not a pure PowerSupply as there might be lots of power loss?

Not just power lose or inefficiency but poor quality of power, which is worse.
https://linustechtips.com/main/topic/631048-psu-tier-list-updated/

 

[Javier_8]

Is that your PSU: http://zumaxpower.com/products/zu600w.htm ?
If yes, then I would suppose this unit is not good enough for your GPU. r9 380x needs 500 W unit minimum, and yours is only 480 W at its max.

So the problem is from the PSU right?

 

[DRagor]

Is that your PSU: http://zumaxpower.com/products/zu600w.htm ?
If yes, then I would suppose this unit is not good enough for your GPU. r9 380x needs 500 W unit minimum, and yours is only 480 W at its max.

So the problem is from the PSU right?

Yes, it looks like so. The only other possibility is faulty PCIe slot on motherboard - but if you had/tried any other GPU with that motherboard and it worked, PSU remains only suspect (as GPU itself works).

 

[mjslakeridge]

In addition to the PSU tier list linked above, here is another list, which gives some explanation of what differentiates a high quality PSU from a poor one.

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html