I successfully updated my Gigabyte Z87M-D3H/EVGA GTX 760/i7 4790K system to 10.9.5 using software update and then:
1. Booted in safe mode (boot option -x) (panic without safe mode)
2. Removed /System/Library/Extensions/AppleTyMCEDriver.kext (this had been re-added by the 10.9.5 update)
3. Rebooted
4. Used MultiBeast to reenable sound (ALC892) and TRIM for my EVO 840 SSD
5. Updated NVIDEA web driver using the NVIDEA control panel
6. Rebooted
Everything seems to be working so far, except that there is a regression on audio after sleep (no audio after sleep). This worked on 10.9.4.