Power Supply with over 4.5a +5vsb???
- Thread starter Namsemag
- Start date
What are you trying to power besides the 2 Xeons and the RAM? I'm wondering if the PSU standard changed at some point, because like you I'm having trouble finding anything with more than 3A on the 5Vsb rail. Bear in mind you're dealing with an end-of-life platform in the form of LGA771 as well. Might be worth asking this question in the Servers/Enterprise section.
Sounds like really weird design if it uses 5Vsb instead of normal 5V rail.
5Vsb's idea is to allow motherboard itself initialize boot up from stand by/hold DRAM content.
But servers aren't even intended to be kept in standby.
And that high current 5Vsb is definitely rare, not much of them when looking FPSs PSU
http://www.fspgroupusa.com/ecommerce/ipc-psu/2u.html
Anyway that motherboard requires lot more power cables than normal PC:
24 pin cable
8 pin cable
2x fully separate 4 pin cable. (not just split 8 pin connector)
So that's going to be equally limiting factor
5Vsb's idea is to allow motherboard itself initialize boot up from stand by/hold DRAM content.
But servers aren't even intended to be kept in standby.
And that high current 5Vsb is definitely rare, not much of them when looking FPSs PSU
http://www.fspgroupusa.com/ecommerce/ipc-psu/2u.html
Anyway that motherboard requires lot more power cables than normal PC:
24 pin cable
8 pin cable
2x fully separate 4 pin cable. (not just split 8 pin connector)
So that's going to be equally limiting factor
It's almost like it needs 2 PSUs. It is a weird requirement. Here's a link to the manufacturer's advisory on the subject:
http://www.tyan.com/manuals/Memory_Population_Notice_5397.pdf
http://www.tyan.com/manuals/Memory_Population_Notice_5397.pdf
Ocuk did sell a board that let you connect two psu to one board.
Like this.
https://www.overclockers.co.uk/phan...to-1-motherboard-ph-pwcob_2p1m-ca-058-pt.html
Not used one myself so I don't know if it will work, but it might
Like this.
https://www.overclockers.co.uk/phan...to-1-motherboard-ph-pwcob_2p1m-ca-058-pt.html
Not used one myself so I don't know if it will work, but it might
While wire from combiner might be on skinny size for current that should work for combining 5Vsb output from two PSUs.Ocuk did sell a board that let you connect two psu to one board.
Like this.
https://www.overclockers.co.uk/phan...to-1-motherboard-ph-pwcob_2p1m-ca-058-pt.html
Not used one myself so I don't know if it will work, but it might
Phanteks should know answer for that.
CPU power cables from PSUs again can be connected directly bypassing that.
Was going to say a duel PSU solution might be worth looking at, you can buy splitter cables to run two as if they were one. And you could get away with two slightly lower wattage PSUs than one great big powerful one.
Only caveat is you might have to balance the components across the rails /PSUs to ensure one PSU isn't working really hard whilst the other one chills out not doing much.
Only caveat is you might have to balance the components across the rails /PSUs to ensure one PSU isn't working really hard whilst the other one chills out not doing much.
Except for needing adapter to get second 4 pin CPU power connector that should work.
Akasa has one adapter changing PCI-e cable to 8 pin PCU power cable, but such likely won't fit to 4 pin connectors.
https://www.overclockers.co.uk/akasa-pci-e-to-atx12v-cable-adapter-ak-cb051-cb-033-ak.html
Though basing to manual that motherboard should come with some "1 x 12V Power Y-cable" so maybe that's the cable splitting 8 pin connector to two 4 pin connectors.
(high end PSUs have two 8 pin CPU power cables)
Akasa has one adapter changing PCI-e cable to 8 pin PCU power cable, but such likely won't fit to 4 pin connectors.
https://www.overclockers.co.uk/akasa-pci-e-to-atx12v-cable-adapter-ak-cb051-cb-033-ak.html
Though basing to manual that motherboard should come with some "1 x 12V Power Y-cable" so maybe that's the cable splitting 8 pin connector to two 4 pin connectors.
(high end PSUs have two 8 pin CPU power cables)