So I have an older HW8540w I picked up off for a decent price. It only had 1GB of memory and the HDD was removed. I promptly installed a SSD and installed windows 7 (legit copy). Everything was going smoothly. Then it went downhill:
1) I pulled the 1 GB memory stick and installed an 8gb stick of G.Skill (F3-1600C11S-8GSL). The laptop BSOD three times straight during the Windows loading screen. I swapped the 1GB back in, no problems.
2) Read the manual and figured from what it said that 1600MHz was too high for a single 8GB stick so I returned it for a single stick of 8GB (F3-1333C9S-8GSL).
3) Installed that 8GB stick and again, 3 straight BSODs at the Windows loading screen. Put the 1GB of PC3-8500S back in and agins, worked just fine.
4) Figured maybe I needed to put it in the second memory slot under the keyboard. I removed the keyboard and installed the 8Gb stick there, all I got was a blank black screen. Same thing with the 1GB stick.
So, any ideas? I'm racking my brain because it works just fine with 1GB. I'm wondering if I should try 2x4GB instead? Any ideas?
 Running windows 7 64bit Pro
Here is the maintenance manual from HP: http://h10032.www1.hp.com/ctg/Manual/c03382696
[edit2]Ok, think I'm still using the wrong memory, should be using 2x4GB if I want 8gb and using PC3-12800, 1600-MHz instead of PC3 10666. Can someone confirm if that would cause the problems I'm experiencing?[/edit]