and to be honest, power usages is actually low even though the motherboard is on high performance "mode" and that was a trick to learn !! also this is required due to hardware limitations that the compact design of a 2U gives a odd arrangements of pci-e slots on risers boards that allows to use 4 x single slot, full length video cards allotments and 2 x low profile, single slot and half length video cards allotments for a total of the 6 pci-e slots.. due to server case being low profile Using 4 x XFX single slot 460 and 2 x MSI single slot micro badass 460 would be the best setup to mount them properly and and no external power source is required to plug into these video cards and that increased power savings efficient!!! There is a major flaw with with BMC controller that prevents the motherboard from disabling the onboard AMD gpu . So any AMD Gpu video card that I installed will always become the secondary video dispaly under the windows or linux environment. Even if i disabled the onbaord video in the BIOS setup.. all six gpus plug into a Video screen just goes blank and you can hear the server ramp up the fans which is not good!! Your forced to reset the jumper on the motherbaord in order for the defaults to set the onboard video back on!! and thats the only way to get all 6 gpu to work under secondary display. if the bios rest didnt work, removing all 6 gpu is the only solution Then by accident after doing a bios reset and cards removal , I install a Nvidia card in the low profile, half length slot and to my surprise The server bios started on the Nvidia screen and the onboard gpu was disable which none of the amd video cards I've install can never do before and the nvidia is actually is siting on a HP/AMD motherboard. Then I allowed windows to install the nvidia drivers and then asked to restart windows which i allowed and I seen the fastest reboot and re start like it did never before. Somehow The Nvidia video card did the trick and I installed all 5 x amd with the nvidia being the main dispaly which allow more resources to mine cryptocurrenecy on the amd cards.. to be honest , im actually mining on all gpus and cpus , the fans are low and not ramping up.. when I removed the nvidia card, that caused the onboard video to kick back on and youll noticed how much slower the server is running under the windows/linux environment and the fans are ramping again..
dude you aint playing game you dont need gpu to main display, just need its computing power to do a hash. i actually have z270 right now to which i connected my display to onboard video and mining on two gpu. Initially I set one of the gpu to monitor and set in the bios an external video as main but it just burped. My suspicion is usb3.0 connector. So i decided not to bother with this and went for onboard for main display. Actually I dont really need display at all, once it is setup and running, i am using ssh (linux) and rdp (windows) to log on and interact with the miner.
10yrs experience with bios dev and test. AMA and I will try my best!