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Risers for h81 btc
Hello, guys!
I am looking for a h81 btc and now i am can't understand what risers do i need.
This board has a 2 molex for x1 pci-ex slots (as you know, offcourse
) and my logic tell me - you need non-powered x1-x16 risers.
But same people on different forums says better powererd or usb risers with unplugged 2 molex on motherboard.
Please help me to understand what riserss is better in my opininon...
risers.ru - that's a nearest place where i can buy risers (i live in Asia)
I am looking for a h81 btc and now i am can't understand what risers do i need.
This board has a 2 molex for x1 pci-ex slots (as you know, offcourse
) and my logic tell me - you need non-powered x1-x16 risers.But same people on different forums says better powererd or usb risers with unplugged 2 molex on motherboard.
Please help me to understand what riserss is better in my opininon...
risers.ru - that's a nearest place where i can buy risers (i live in Asia)
Comments
Only power the 2 molex connections if you use low power gpu where one power supply is enough to run the entire rig.
If you want to use two power supplies DO NOT use the molex connectors on the motherboard because voltage from one power supply will meet with the voltage from another power supply... Do I need to explain what happens next?
Cards like rx 460, r7 370, r9 270 DO NOT need powered risers and run more stable and safe without the extra power.
Cards like RX480 and R9 290/390 will need the extra power due to their electronic design.
As a rule of thumb any card with TDP below 150W should run safe without powered riser.
RX 470 and RX 480 are an exceptions to this rule due to their electronic design where ALL of the DDR memory chips are powered from the PCIE only and therefore require 75W from that slot which motherboard cannot provide.
7950, 7970 and 7990 will all run without powered risers because it's design pulls very little from PCIE.
In my view usb risers add alot of extra cost and are only useful when you are too lazy to get properly measured frame.
I am planning to build rig with 4-6 gtx 1070 or RX470, 480. So in my opinion as i understand i will must use standart x1-x16 powered risers like this .
But now i don't know what kind of psu i will use. Maybe solo 1200w or two 650w. hmmm
@wemaymore That is powered rises bat that IS NOT USB powered riser (use them if you can as someone already said before) this is what you are looking for
As for PSU it does not really matter. Do calculations what is cheaper for you. But in most countries i found that 2 smaller PSU >> 1 large PSU because it simply cost less for same amount of power
My understanding is that as long as 1st PSU is responsible for the mobo molex's and the riser molex's then it's fine, you just get problems if 2nd PSU does anything except 6/8pin +12v to GPUs. Where are the voltages for the 2 PSUs supposed to meet if 1st PSU does ALL the molex connections?