Cfx on msi h170a pc mate

[pe6600]

I want to buy a computer and I am confused about the mobo. So here are the parts i want to buy:
i5 6500
msi h170a pc mate
sapphire nitro r9 390
2x4gb ddr4 2133mhz
So i may cf in the future and my question is if the mobo supports cfx? I got very confused because everywhere it says that the h170 chipset doesnt support it but on the msi site its saying that the mobo does? http://www.msi.com/product/motherboard/H170A-PC-MATE.html#hero-overview
Ty in advance

 

[rhysiam]

So technically it supports crossfire, but the second slot only has x4 PCIe lanes, which isn't ideal for a multi-card setup. Given that it's a PCIe 3.0 x4 slot, that's still a reasonable amount of bandwidth and would probably be okay, but ideally you want a motherboard that will give x8 lanes to each GPU.

 

[pe6600]

So technically it supports crossfire, but the second slot only has x4 PCIe lanes, which isn't ideal for a multi-card setup. Given that it's a PCIe 3.0 x4 slot, that's still a reasonable amount of bandwidth and would probably be okay, but ideally you want a motherboard that will give x8 lanes to each GPU.

So basically if I cf on this mobo i wont be getting all the performance from a second r9 390?

 

[rhysiam]

It's been a while since I've looked into it, and I haven't seen anything since Skylake was introduced - which means you at least have x4 PCIe 3.0 lanes, which is almost double the bandwidth from the old x4 PCIe 2.0 slots on Haswell and earlier.

I can't say for sure whether CFX is significantly impacted when one card is running on a x4 3.0 slot. There are benchmarks about, but often they don't test CFX setups, and CFX definitely has an impact on the bandwidth as cards needs to share resources. My guess would be that most games will go okay, but I would expect a few games to be impacted, possibly significantly. I don't know though, that's speculation on my part.

Best advice would be to look for a motherboard with two x8 PCIe lanes. If you're shelling out that kind of money on graphics, it seems silly to gimp it with a motherboard when the price difference is so small.

 

[pe6600]

It's been a while since I've looked into it, and I haven't seen anything since Skylake was introduced - which means you at least have x4 PCIe 3.0 lanes, which is almost double the bandwidth from the old x4 PCIe 2.0 slots on Haswell and earlier.

I can't say for sure whether CFX is significantly impacted when one card is running on a x4 3.0 slot. There are benchmarks about, but often they don't test CFX setups, and CFX definitely has an impact on the bandwidth as cards needs to share resources. My guess would be that most games will go okay, but I would expect a few games to be impacted, possibly significantly. I don't know though, that's speculation on my part.

Best advice would be to look for a motherboard with two x8 PCIe lanes. If you're shelling out that kind of money on graphics, it seems silly to gimp it with a motherboard when the price difference is so small.

Thank you very much