- Apr 21, 2015
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I need to provide external dedicated power supply to an Asus R9 380X with this 300W PSU.
The GPU comes with an 8pin male to 2x6pin female adapter like this and my PSU doesn't have an 8pin or 6pin PCIe output anyway.
My options are to wire up the 8pin EPS header (intended for CPU) and/or some of the 5.25" outputs of the other trunk of wires.
I was thinking to use an adapter like this http://www.pchelpforum.com/attachment.php?attachmentid=60013&d=1451483197 for one of the two 6pin ends, and an 8pin EPS to 6+2pin PCIe adapter like this for the other one: http://www.amazon.com/Express-adapter-inches-sleeved-Angeles/dp/B005H3KH9E (leaving the 2 GNDs unplugged)
In theory this should allow me to use both 12V independent rails of the PSU; can there be issues with a setup like this?
Thanks in advance!
P.S. today the forums are almost unusable..some DDoS?
Edit: some specifics and maths, done after reading http://www.overclock.net/a/gpu-and-cpu-power-connections
Thoughts?
The GPU comes with an 8pin male to 2x6pin female adapter like this and my PSU doesn't have an 8pin or 6pin PCIe output anyway.
My options are to wire up the 8pin EPS header (intended for CPU) and/or some of the 5.25" outputs of the other trunk of wires.
I was thinking to use an adapter like this http://www.pchelpforum.com/attachment.php?attachmentid=60013&d=1451483197 for one of the two 6pin ends, and an 8pin EPS to 6+2pin PCIe adapter like this for the other one: http://www.amazon.com/Express-adapter-inches-sleeved-Angeles/dp/B005H3KH9E (leaving the 2 GNDs unplugged)
In theory this should allow me to use both 12V independent rails of the PSU; can there be issues with a setup like this?
Thanks in advance!
P.S. today the forums are almost unusable..some DDoS?
Edit: some specifics and maths, done after reading http://www.overclock.net/a/gpu-and-cpu-power-connections
■ the tiny Antec FP-150-8 can only supply max 10A on +12V, which is shared with all the other PC components; max 75W are going to be drawn directly from this input; I expect the GPU to draw what else is needed from the external 8pin header it has
■ the two rails on the external PSU have each max 18A and provide a maximum (combined) power of 252W
■ the GPU is probably going to draw max 195W from the (splitted or not) 8pin connector
■ I could use the 8pin EPS to 6+2pin PCIe adapter directly instead of the attempt described above that would cover both rails
Thoughts?
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