how many cards is too much for this motherboard?

[sub-80]

Hello Guys;

I have a p7h57d-v evo motherboard which I currently have 2 gtx 780 which I game/mine and edit videos, I have a thermaltake 1500w toughpower psu which supports quad sli/crossfire and am considering adding 1 to 3 graphics cards to the the 3 pciex1 slots via pciex1 to pciex16 powered riser adapter which the cards will be connected to a separate psu for mining. What am concerned about is the stability of the motherboard, what do you think?

New Version:
Hey guys;

Was wondering if it possible to add 1 to 3 more cards to my pc for mining? I have a Asus P7H57D-V EVO motherboard with a I7-875k @ 4Ghz processor and 1500w thermaltake thoughpower.

Motherboard has the following pcie:
2 x PCIe 2.0 x16 (single at x16 or dual at x8/x8 mode) one used, waiting for the other card to be placed here.

1 x PCIe 2.0 x1 (5GT/s, blue slot)
2 x PCIe 2.0 x1 (2.5GT/s, gray slots)

I have these three pcie x1 slots and am wondering if its possible to connect 1 to 3 cards on them will be powered from a separate psu.
I will be using a powered pciex16 to pcie x1 riser with the usb cables for ease of maneuverability of pc in case I need to move it for clean up or other reasons.

Checked manual and saw the IRQ assignments tried to read about but didn't get it.

Manual download site:http://www.asus.com/Motherboards/P7H57DV_EVO/#support

If you can please shed some light that would grateful. :-*

 

[BonzaiDuck]

Hello Guys;

I have a p7h57d-v evo motherboard which I currrently have 2 gtx 780 which I game/mine and edit videos, I have a thermaltake 1500w toughpower psu which supports quad sli/crossfire and am considering adding 1 to 3 graphics cards to the the 3 pciex1 slots via pciex1 to pciex16 powered riser adapter which the cards will be connected to a separate psu for mining. What am concerned about is the stability of the motherboard, what do you think?

Off top of my head, I'm thinking it depends on the number of available PCI-E lanes. It also depends on how resources are shared between different motherboard components.

For instance, my mobo has three "x16" PCI-E slots. But if I use the third slot, I'm deprived of on-board USB 3.0 from the internal plug. Or if I use some other slot, the third x16 becomes an x4.

Your mobo "handbook" or manual should have some sort of table that lays out these limitations.

 

[BrightCandle]

Asus normally list out all the available GPU layout options in their manuals so you can see what speeds different slots get and under what circumstances. That is the first place to check, they do online downloads of them for the latest(http://www.asus.com/Motherboards/P7H57DV_EVO/#support)

 

[sub-80]

Yeah I remember reading it when I assembled the pc but it only notifies you that 2 vga cards are placed in the pcie 2.0 they will both run in x8 and to assign the IRQ in the Bios to avoid the card not operating or the motherboard being unstable when installing a new card but windows usually deals with the IRQ. That the only thing it has with a table of irqs assignments of the motherboards and the standard interrupt assignment table.

But there is nothing that specifies limitation to my knowledge.

 

[BonzaiDuck]

Yeah I remember reading it when I assembled the pc but it only notifies you that 2 vga cards are placed in the pcie 2.0 they will both run in x8 and to assign the IRQ in the Bios to avoid the card not operating or the motherboard being unstable when installing a new card but windows usually deals with the IRQ. That the only thing it has with a table of irqs assignments of the motherboards and the standard interrupt assignment table.

But there is nothing that specifies limitation to my knowledge.

Again -- off the top of my head -- you brought up one of the key factors.

Point being -- the mobo manual or user guide should explain what IRQ's are shared, and the other related limitations.

I used to load up my system with any legacy card or expansion card I wanted. Maybe I only had minor issues and resolved the problem with some troubleshooting. But I'm more careful these days -- hoping to decide what expansion cards to put in the case ahead of constructing it.

We all want "expansion" potential. Or -- we want "replacement" potential. I don't do much "expanding" anymore, and usually don't have to do much replacement, either. [knock on wood, though. As I said in other threads and Anand forums, I just replaced four RAM sticks with two, but it wasn't "necessary."]

 

[sub-80]

Again -- off the top of my head -- you brought up one of the key factors.

Point being -- the mobo manual or user guide should explain what IRQ's are shared, and the other related limitations.

I used to load up my system with any legacy card or expansion card I wanted. Maybe I only had minor issues and resolved the problem with some troubleshooting. But I'm more careful these days -- hoping to decide what expansion cards to put in the case ahead of constructing it.

We all want "expansion" potential. Or -- we want "replacement" potential. I don't do much "expanding" anymore, and usually don't have to do much replacement, either. [knock on wood, though. As I said in other threads and Anand forums, I just replaced four RAM sticks with two, but it wasn't "necessary."]

Thanks for the info

 

[sub-80]

Sorry my friends I haven't figured it out.

Updated the initial post. Any help would be great.

 

[sub-80]

Got a reply from a member from another forum telling me a max of 4 vga are possible in that motherboard.