Topic: Number of cards without powered risers? (Read 608 times)
Most boards have a power allotment on the PCIe Bus you can normally run 3 cards with out putting a drain on the bus but more then three you normally need extra power so you don't burn up the MB or the video cards. At least this is my experience
I've never used powered cables. I used to run three 5830s on each motherboard for a good year or two without problems. Upgraded all of my rigs a few months back to 7950s. I am running two 7950s on each board right now without issues. Only reason I didn't use three or more was because all of my PSUs are 750w. If my PSUs where 900+w, I wouldn't have even given powered risers a second thought.
Yeah well as I thought, there shouldn't be any problems with 2 or even 3 cards. But how about 4 to 6 in one MB? Is there ANY motherboard that could handle such a load?
I've never used powered cables. I used to run three 5830s on each motherboard for a good year or two without problems. Upgraded all of my rigs a few months back to 7950s. I am running two 7950s on each board right now without issues. Only reason I didn't use three or more was because all of my PSUs are 750w. If my PSUs where 900+w, I wouldn't have even given powered risers a second thought.
Yeah well as I thought, there shouldn't be any problems with 2 or even 3 cards. But how about 4 to 6 in one MB? Is there ANY motherboard that could handle such a load?
I've never used powered cables. I used to run three 5830s on each motherboard for a good year or two without problems. Upgraded all of my rigs a few months back to 7950s. I am running two 7950s on each board right now without issues. Only reason I didn't use three or more was because all of my PSUs are 750w. If my PSUs where 900+w, I wouldn't have even given powered risers a second thought.
As many as they fit i guess. Why should you require risers if there is space to put them on board?
For what I have understood, there's a risk that motherboard will burn if too much power is taken thru the PCIe- slots.
For the cooling purposes, unpowered risers would be just fine.
I had no issues with 3 unpowered risers on a matx board.
I would run powered risers on anything more then 4 but check if the motherboard also has an additional 12v input which some motherboards do like the Asrock which I would then run up to 5 unpowered risers.
I would run powered risers on anything more then 4 but check if the motherboard also has an additional 12v input which some motherboards do like the Asrock which I would then run up to 5 unpowered risers.
As many as they fit i guess. Why should you require risers if there is space to put them on board?
Cooling. You are not going to run three cards at 100% 24/7 next to each other on the MB.
I believe two would even heat crash often. I run my rigs open air with a two shelf system. The MB on the bottom shelf and the GPUs on the upper shelf using risers.
I'd go for max 3 cards with unpowered risers, more at your own risk!
As many as they fit i guess. Why should you require risers if there is space to put them on board?
In my experience..The answer is 3.
At 4 I seem to have a much greater chance of charring up the main MB power connector (Most cards will draw somewhere around 75 Watts through the MB).
I know, people will come in here and claim they run a dozen cards or whatever they want to claim without power risers.
I can only tell you what I have experienced in the few years of running my rigs. Without powered risers,at three cards I have only burned up one MB. At 4+ the number jumps.
At 4 I seem to have a much greater chance of charring up the main MB power connector (Most cards will draw somewhere around 75 Watts through the MB).
I know, people will come in here and claim they run a dozen cards or whatever they want to claim without power risers.
I can only tell you what I have experienced in the few years of running my rigs. Without powered risers,at three cards I have only burned up one MB. At 4+ the number jumps.
I remember a thread talking about this and you seem to be spot on. If you're running 3 79xx/r280x just assume that you'll need a powered riser. I imagine that such risers are also getting a commensurate price squeeze.
How many graphics cards (R9 280x) can motherboards handle without any powered risers? I think 2 is OK with any MB, but how about 3? Or is there any specific MB model that could handle even more of them?
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