LVGENT :
ko888 :
Improper load distribution across the +12V rails.
Is it possible to fix it?
Only with a new power supply with better design.
The review of the Topower PowerBird 1100W, that I've read, said:
Having six 12V rails which can only output up to 20A each can easily throw the PSU off-balance if only one or two lines are heavily loaded (due to very power-hungry GFX cards for example) and cause problems, even random shutdowns.
One R9 280X should not be running from two PCIe power connectors connected to the same color PCIe (e.g. two light blue PCIe or two dark blue PCIe) connectors on the PSU's modular interface panel.
[ 1 ] [ 2 ] [ 3 ]
[ 4 ] [ 5 ] [ 5 ]
[ 7 ] [ 8 ] [ 9 ]
[ 10 ] [11]
[ 1 ] [ 2 ] appear to be on the same +12V6 rail and would be overloaded.
[ 4 ] [ 5 ] appear to be on the +12V5 rail and would also overload with one Gigabyte R9 280X during gaming.
Using
[ 2 ] and
[ 4 ] would be on two different +12V rails and that's why it works.
That Topower PowerBird 1100WSE cannot properly handle two Gigabyte R9 280X in 2-way CrossFire mode while gaming.