Hello, I just bought a Phenom X2 555 BE and I have successfully unlocked the other two extra cores. So I now have four cores working. The only problem is the system getting unstable (BSOD) whenever I use Photoshop (CS4) and/or Lightroom 3. If I disable the fourth core and running only with Core 1, 2 and 3, the system is stable and I can use Photoshop and/or Lightroom without issues. So apparently the fourth core is kind of faulty. I know that the two extra cores are bonus because this is a dual-core product ... but wondering if I can do something to stabilize the fourth core? Also, why only Photoshop and Lightroom that affects this core? Thank you for your help.