pcie needed for multi gpu.

[Hexram]

Hey guys I am building a new system and when reading the motherboard user guide it says that if I fill both pcie slots they only operate at 8x. Is this going to be enough pcie bandwidth to run two cards.

Motherboard maximus vii gene

Gpu 2 x R9 295x2

[Shroomster]

Yes it will.

[dragoon20005]

Hey guys I am building a new system and when reading the motherboard user guide it says that if I fill both pcie slots they only operate at 8x. Is this going to be enough pcie bandwidth to run two cards.

Motherboard maximus vii gene

Gpu 2 x R9 295x2

why a mATX board for dual 295X2?

 

it will work but the spacing between the GPUs will not be good for the VRM cooling

[Shroomster]

why a mATX board for dual 295X2?

 

it will work but the spacing between the GPUs will not be good for the VRM cooling

I am guessing a sff build with as much horsepower possible.

[Hexram]

Hey dragoon20005

thanks for the quick reply

The gpus are going to eventually have fully cover waterblocks on them. Matx so its easy to take to lans.

[Thorium19]

Yeah, it's enough bandwidth for the GPUs to operate. It's very common for mobos to be that if they're not X79 boards, due to the number of allotted PCI-E lanes available for a chipset, 16 gen 3 lanes for Z97 I believe, so spread over two slots making it 8 in each is fine. It won't have any major or catastrophic effect. In fact, it won't have any effect at all really.

[dragoon20005]

Hey dragoon20005

thanks for the quick reply

The gpus are going to eventually have fully cover waterblocks on them. Matx so its easy to take to lans.

interesting build

 

if you do that please make a build log

[Hexram]

The other thing that worries me in terms of bandwidth is that I also have a pcie m.2 ssd for the m.2 slot. Will this reduce bandwidth to the cards?

[Hexram]

interesting build

if you do that please make a build log

Will do. I got some photos of the hardware but don't know how to upload from my phone to the forum.

[Hexram]

interesting build

if you do that please make a build log

Will do. I got some photos of the hardware but don't know how to upload from my phone to the forum.

[Thorium19]

The other thing that worries me in terms of bandwidth is that I also have a pcie m.2 ssd for the m.2 slot. Will this reduce bandwidth to the cards?

M.2 should only affect the smaller bandwidth lanes, not the PCI-E 16X lanes, so you should be okay, but checking the motherboard manual or user guide is your best bet to make sure.

[dragoon20005]

The other thing that worries me in terms of bandwidth is that I also have a pcie m.2 ssd for the m.2 slot. Will this reduce bandwidth to the cards?

according to the spec

 

 The PCIe 2.0 x4 slot (PCIEX4_1) shares bandwith with mPCIe 2.0 x1 and M.2 slots. The default setting is in Auto mode that automatically optimizes the system bandwidth. If you install PCIe 2.0 x4 device, the system will automatically detect and disable mPCIe 2.0 x1 and M.2 slots.

 

 

as long you dont install anything on the X4 slot

 

you can install the M.2 SSD