OTOY Forums

caffe3 wrote:How about 4x Titan X superclocked inside a Cooler Master HAF X (it has a fan on the side of the case aimed at the gpus as well as one in the middle of the case, also aimed at the gpus).

The nvidia Dev computer has aircooled titan x. So a case like HAF X with 2 extra fans directly on the gpus should be pretty solid, no?

TitanX has no backplate & thus more space in between these cards in multi GPU rigs to help them breathing =) so it's less of an issue now with overheating..maxwell architecture as opposed to kepler helps too as it's even more efficient (less heat emitted), but still..You can get more performance & at the same time less nice cooling them properly..

Cool, wasn't aware of the backplate.

I've wanted to watercool for a good while now, but I'm too afraid of the possibility of it leaking + maintenance (emptying and refilling the thing). Also from what I hear it costs around the same amount as getting a Titan. Maybe it's worth it though to get a quieter rig hehe.

caffe3 wrote:Cool, wasn't aware of the backplate.

I've wanted to watercool for a good while now, but I'm too afraid of the possibility of it leaking + maintenance (emptying and refilling the thing). Also from what I hear it costs around the same amount as getting a Titan. Maybe it's worth it though to get a quieter rig hehe.

Be a man and go with water

Tos wrote:I tried with 3 cards directly connected and it works, but when I connect one riser (shielded, powered) it starts with those crazy errors on boot.
On another motherboard all the gpus work ok with risers (both 16x-16x and 16x-1x) so I don't know what to think.

On the x99 board see if there is an option to run the pcie3.0 slots at pcie1.0 or 2.0 spec. I cant remember exactly what its called but there should be an option. I have read some bit coin miners reported problems running riser cables on motherboards with pcie 3 spec and changing this option in the bios fixed things for them.

ten

ten wrote:

Tos wrote:I tried with 3 cards directly connected and it works, but when I connect one riser (shielded, powered) it starts with those crazy errors on boot.
On another motherboard all the gpus work ok with risers (both 16x-16x and 16x-1x) so I don't know what to think.

On the x99 board see if there is an option to run the pcie3.0 slots at pcie1.0 or 2.0 spec. I cant remember exactly what its called but there should be an option. I have read some bit coin miners reported problems running riser cables on motherboards with pcie 3 spec and changing this option in the bios fixed things for them.

ten

In UEFI, go to Advanced Mode if not already in it. It's under the Advanced tab, you're looking for "NB PCI-E Configuration." Lets you adjust the speed of each PCIE slot. They are all [Auto] by default, and you would likely want to try stepping down to [Gen2] to see if it works better before dropping to [Gen1]. Under the same Advanced Tab, there's an option to turn off smart PCIE power management (forget the name of it, Advanced Power Link Management or something, can't find the manual atm), but disabling it may also help with issues relating to how much power is being allowed to run the slots.

smicha wrote:Be a man and go with water

Haha, I wish it was that easy to make the decision. Too much money poured into the build, but I might do it in the near future when I acquire the three missing titans, if I notice the gpus overheating or crunching extra slow.. For now, I think I'm good though

sikotik13 wrote:

ten wrote:

Tos wrote:I tried with 3 cards directly connected and it works, but when I connect one riser (shielded, powered) it starts with those crazy errors on boot.
On another motherboard all the gpus work ok with risers (both 16x-16x and 16x-1x) so I don't know what to think.

On the x99 board see if there is an option to run the pcie3.0 slots at pcie1.0 or 2.0 spec. I cant remember exactly what its called but there should be an option. I have read some bit coin miners reported problems running riser cables on motherboards with pcie 3 spec and changing this option in the bios fixed things for them.

ten

In UEFI, go to Advanced Mode if not already in it. It's under the Advanced tab, you're looking for "NB PCI-E Configuration." Lets you adjust the speed of each PCIE slot. They are all [Auto] by default, and you would likely want to try stepping down to [Gen2] to see if it works better before dropping to [Gen1]. Under the same Advanced Tab, there's an option to turn off smart PCIE power management (forget the name of it, Advanced Power Link Management or something, can't find the manual atm), but disabling it may also help with issues relating to how much power is being allowed to run the slots.

Thank you guys, gonna give it a try

sikotik13 wrote:

ten wrote:

Tos wrote:I tried with 3 cards directly connected and it works, but when I connect one riser (shielded, powered) it starts with those crazy errors on boot.
On another motherboard all the gpus work ok with risers (both 16x-16x and 16x-1x) so I don't know what to think.

On the x99 board see if there is an option to run the pcie3.0 slots at pcie1.0 or 2.0 spec. I cant remember exactly what its called but there should be an option. I have read some bit coin miners reported problems running riser cables on motherboards with pcie 3 spec and changing this option in the bios fixed things for them.

ten

In UEFI, go to Advanced Mode if not already in it. It's under the Advanced tab, you're looking for "NB PCI-E Configuration." Lets you adjust the speed of each PCIE slot. They are all [Auto] by default, and you would likely want to try stepping down to [Gen2] to see if it works better before dropping to [Gen1]. Under the same Advanced Tab, there's an option to turn off smart PCIE power management (forget the name of it, Advanced Power Link Management or something, can't find the manual atm), but disabling it may also help with issues relating to how much power is being allowed to run the slots.

Did you ever have any luck? I have this same board and I'm able to use 1 riser but not 2. I would like to have 3 cards with space between and 2 risers running out to 2 more cards but this setup is only stable with 1 riser coming out. Either way, this is better than 4 gpus right up against each other, but I spent an extra couple hundred on this motherboard for a reason.