Dual GPU on Asus Z170 Pro Gaming?

[Mentalt]

Hello!
Ive got a little problem, would be terrific if anyone can help me with it.
So I have a rig with Asus Z170, Intel i7 7700k, and my main GPU RX570.
Ive been trying to attach my old RX460 as a secondary card, but my computer doesnt even recognize it. Ive tried the different GPU slots aswell.
When I put it in just the one, it works, but when both are in, it doesnt work.
Anyone have any idea why?

Thank you!

 

[Dunlop0078]

Does it power up? Did you look in the bios to see if the card was detected? What do you plan to use the 460 for? Only some tasks will take advantage of two different gpu's, gaming not being one of them.

 

[Mentalt]

Does it power up? Did you look in the bios to see if the card was detected? What do you plan to use the 460 for? Only some tasks will take advantage of two different gpu's, gaming not being one of them.

It has lights on, I cant detect it in bios. Ah shit I thought it would do better for gaming..

 

[Dunlop0078]

Well I am not sure why its not being detected. But it wont help in gaming at all, it wont even be used, you need crossfire to take advantage of two amd gpu's in gaming and you cant run a 570 and 460 in crossfire.

 

[10tacle]

No, you would need to get another RX 460 or RX 570 to Crossfire one or the other (has to be same GPU). Nvidia can use a secondary lower GPU for PhysX, but these days it doesn't bear near the improvement that it used to since today's GPUs are so powerful. What you can do is use that 460 for a secondary monitor for side apps to take the load off the primary GPU.

As for getting it to be seen with your 570 in, try connecting a second monitor to that 460. Maybe it can't be "seen" until it has an output to display to. This is assuming you have a power supply powerful enough to run both at the same time with everything else you have in there (specifically enough amps on the +12v rail to cover both GPUs simultaneously). You don't say what you have for a PSU.

 

[Mentalt]

Okay thanks guys! Very helpful