I'm having trouble with your Desktop Memory

[LordOfSin]

This was my rig

OCZ Platinum 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model OCZ3P1600LV6GK

EVGA E758-A1 3-Way SLI (x16/x16/x8) LGA 1366 Intel X58 ATX Intel Motherboard

Intel Core i7-920 Bloomfield 2.66GHz LGA 1366 130W Quad-Core Processor BX80601920

EVGA 01G-P3-1286-AR GeForce GTX 280 FTW Edition 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card

Everything ran fine, I was able to play battlefield 3 at 60fps. Have you ever heard that expression don't fix it if it's not broken.
Well I figured why not upgrade my ram a little bit so I bought your G.SKILL Ripjaws Series 12GB (3 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9T-12GBRL I get so much lag now. I went into bios and manually set the times for 9-9-9-24 and made sure to put the voltage at 1.5 now battlefield 3 has become unplayable. Skyrim is laggy as hell. And my friends sound like **** on teamspeak. When I use cpuz the ram is showing 9-9-9-24 and 128 I don't know if this is normal ?

[Tradesman]

Does DRAM freq show at/about 800 in the memory tab of CPU-Z? If so you are at 1600. If not, i.e. it shows around 667, it's gone to the mobo's default boot of 1333. If so go into BIOS and enable XMP and select the 1600 profile.