All the mobo makers who aim for overclockers have had their fair share of bad products. Asus service and RMA is particularly bad of late; had a friend get a replacement mobo with no ATX power header on it! Took about 15 weeks to RMA both of the boards. My Asus boards have had a very long lifespan, but were quite finicky when lots of PCI slots, RAM slots, and RAID were all running. Frustrating boards to set up.
I have had good luck with Abits, but some of their boards have been shitty (BE6, KA7, KT7-R) in terms of peripheral bugginess. This may have to do with their being among the first to adopt features, or they may just be sloppy.
MSI typically is cheap, rather bare in the bios, and performs a little slower than the comp. They are red though and usually sold at the corner store.
Epox boards have become my favorite because I could get $27 refurb 8K7As from newegg. They are not without issue, but they are putting features like the numeric LED indicators for bios codes, internal diode support for AMD, lots of voltage adjustments, and keeping a low price. Hard to beat that combo for my dollar.
If you truly care about stability, buy a Tyan or a Supermicro board. I am a tweaker and an o/cer (and a mobo solderer) so I go for price/performance by and large.
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