ive had no BSOD with 12.6 i will look into the score thing tomorrow, been packing boxes today for moving and im busted skyrim btw has been much better on 12.6 rest i cant say but will advise as i have those games like you and will check them out.
one game ive had crash is Sniper Elite v2 my pc bsod and says overclocking failed fress f1 to enter bios, but says that even what nothing is overclocked so im confused on that i think thats a game error rather than anything else.
btw its a shame you live on a different time zone to me or a phone call or something to compare things live timing would be a good idea, save the money for the moment ont he 3 monitors if i was you give it a few more weeks till the FULL 12.6 is out and try it again, mines been 10times better with 12.6 but if yours dont work try 12.3 i was happy with that driver never an issue with it.
PM me your score for the following
heaven 3.0 i did mine ealier on 1920x1200 and hit 2609 on 4.4ghz and stock clocks. but rest i will do tomorrow afternoon for you if you get me yours and we can go over it
all on stock out the box on normal settings of what it askes i will compare to mine