Windows 7: upgraded 4bg to 8gb bsod help!

hello, i recently upgraded my computer to 8gb of ram and when i looked on my computer it says it is using 7.5gb of ram but im not seeing any better performance. is it my motherboard? not only am i seeing bsod (0x0000007) + (0x00000124) but its not any faster!? please help im working on 'windows 7 home premium 64'
gigabyte GA-A55m-s2v. Amd radeon Hd 6410D

Could be defective RAM, test each module separately with Memtest86+.
RAM - Test with Memtest86+

i did, and both said at about 75% through the test that there was a problem between 8a45de4 and 8a45ba7 also 9a7e960 and 9a7e6f4 and b918fb and b91d8f4

Is the new memory, compatible with the motherboard? I have a Gigabyte motherboard and I'm using memory that is listed as compatible by Gigabyte for my motherboard.

Voltage could be an issue and goes back to compatibility. There are different voltages and memory for the different voltages. Along with what Gigabyte lists, Crucial has a memory configurator that will list what is compatible with your motherboard. www.crucial.com

Avoid the Kingston Value Ram (KVR). Regular Kingston is OK but the KVR can be iffy. I used to do a lot of support on the Dell users forum and we consistently saw problems with the KVR memory.

If what you have is supposed to be certified or compatible with your motherboard, remove one memory module at a time and then test or see if you get the BSOD's. One bad memory module (or bad memory slot on the motherboard) could be the problem.

I see you checked this as fixed. Could you post what the fix was? for us and for others that may view this thread.