BSoD woes..

Here's my overclock profile: http://valid.canardpc.com/show_oc.php?id=1082251
Please note my Voltage is 1.3675, not 1.5v..

I've had this running at 3.6 with a fan drawing air in with a Corsair H50.

Now I've added 2 Apache's in push/pull, and some artic silver with the line method, I'm getting BSoD in-games and prime95.

Idle temps: 38-40c, load temps 51c (In COD:MW2). Crashes after 30 minutes of BC2.. And reaches 52c in Prime95 and dies after Test 2.

Anything I can try, do you think my paste is incorrrectly applied?

I have a massive case, the ACTS840.

My airflow:

http://imgur.com/m24Re.jpg