I had this same issue. What I did as a workaround is reflash the BIOS and not run QFan tuning. I set each fan to PWM (since that's what is connected), and customized each setting to manual and it works fine. The only slight issue is that fan #4 doesn't spin at all until cpu reaches a certain temp but that is fine.
Let us know what you come up with. Hope this helps.
M7H (2012) | i7-4790K @ 4.7ghz @ 1.275v | cache @ 4.4ghz @ 1.275v |16gb (2x8) Xtreem @ DDR3-2666 (11-13-13-35-1T) | GTX 770 | AX860 PSU
CVF-Z (2002) | FX-8350 @ 4.6ghz @ 1.4875v | cpu/nb @ 2600 @ 1.275v | ht @ 2600 | 8gb (2x4) Redlines (996997) @ DDR3-2133 (9-11-10-28-1T) | GTX570 | 850Z PSU