its not like there isn't difference, you sit at a higher clock (not substantially) but he sits at a very low latency rate compared to yours. The difference isn't supposed to be really great, he would be sitting at a better performance than you but not the way you are experiencing it now.
You are currently using a 1x16 2666 MHz CL19 RAM.
Since you mentioned T-Force RAM's, I guess this is as good :
here
The above RAM suggested is a 2x8 GB 3200MHz CL16 RAM.
Your Board can go upto 3400 MHz.
Now here are some rookie RAM tips.
1.Never buy Higher Latency RAM (ie dont go above CL17), its not a good investment and you'll probably find yourself replacing it soon enough as it will bring down the rest of your performance by a small margin.
2.When you buy RAM kits, make sure its always Dual Channel (ie) 2x8 instead of 1x16, Dual Channel will net you more performance than a single channel will do. Single Channel is generally okay if you keeping future expansion in minds or in a budget fit.
3.When you buy RAM kits, Keep your board in mind, if it has support for 3400 MHz, then you should always go for a RAM kit that can perform at 3000/3200/3400 speeds. Buying lower speed RAMs aren't bad, but if your motherboard allows it and the speed factor is only just a few more bucks, then why not grab that extra performance.
- You can't use RAM kits of Different Latencies, so if you were planning to put your 1x16 CL19 in one slot and buy a 1x8 CL16 in another, then its not going to work.
- You can't use RAM kits of different speeds as well, if you are getting a 2x8/1x16 3200 MHz RAM Kit and try to use your 1x16 2666 MHz RAM Kit, then the XMP profile will most probably underclock your RAM so it runs on the same speed as your other RAM. In this case, if you are getting a 3200 MHz RAM and use it with your 2666 MHz RAM, then the speed will be automatically set to 2666 MHz.
So if you are going to buy a 1x8 GB 3200MHz CL16 and think about using your 1x16 GB 2666 MHz CL19, then its a bad idea. If you desperately need a proper upgrade, look for a RAM whose latency is not above CL17, has clockspeeds that can reach upto 3000MHz/3200MHz and probably a 2x8 instead of a 1x16.