We thought that it might be a KVM issue, but even with direct PS2 and USB keyboard connection we had the strange F9 freezing issue most of the time, even though a few times it worked just fine actually loading the BIOS and not freezing the system. Anyway, while we are not entirely sure what is causing the BIOS freezing issue when you try to get inside with F9 after you set the required options to make the motherboard work with 7x GPUs everything else seems to work just fine.
The only issue with this motherboard is the higher price and that may be enough of a reason to make you stick with the more affordable and problem free use of AsRock H81 Pro BTC for 6x GPUs instead. Still if you already have a 6x or even less GPUs on some mining rigs and you have a suitable power supply an upgrade to a 7x GPU motherboard might be an interesting choice.
AsRock is without a doubt the most popular manufacturers of motherboards designed for GPU mining rigs thanks to their H81 Pro BTC model, however lately the company is having trouble providing enough motherboards for GPU miners.
The motherboard even has an M. The only problem with Biostar as a brand is the limited availability on many markets or the total lack of such, unlike AsRock that is available on much more markets worldwide. It is not like there are no other interesting alternatives available to the popular AsRock H81 Pro BTC motherboard with more recent chipsets, but since they are not designed for GPU mining rigs specifically they may not all work or may need some special settings and tuning. You may want to make sure that the BIOS of the motherboard you go for has this BIOS option available, as otherwise the operating system may have issues properly assigning resources for all 6 GPUs and they many not work.
Asrock h81 pro btc bios agroall.com
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ASROCK H81 PRO BTC BIOS Chip
Installed Qty. Interface Provided Qty. Connector Type. Networking Data Link Protocol.
Ethernet, Fast Ethernet, Gigabit Ethernet. Network Controller. Gigabit Ethernet. Miscellaneous Compliant Standards. Product Type. Included Accessories. Audio Audio Codec. Realtek ALC Compliant Standards. High Definition Audio.
Video Video Output. Audio Output Compliant Standards. Audio Codec. High Definition Audio 6-channel. LAN Network Interfaces. Registered or Buffered.
ASRock H81 Pro BTC - - motherboard - ATX - LGA Socket - H81 Specs - CNET
Max Size. Uniquely designed envelope closure to cover. This 7-way RV blade socket is equipped with a spring-loaded dust cover that keeps the connection points dry and protected when not in use. Made of the highest quality aluminum for a weather resistant finish. We will confirm with you.
You will need a new bios chip for the following purposes.. Condition:: New: A brand-new, unused, unopened, undamaged item in its original packaging where packaging is applicable. Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.