Internet slows down if memory overclocked to 2400 MHz.

If I left my memory at stock speed (1333 MHz) my internet speed is normal (around 390-450 KB/s). But once I overclock it with XMP (2400 MHz @10-12-12-31 2T), it drops down to 30-60 KB/s. The internet speed will also back to normal if reduce the clock and timing to 2133 MHz @9-11-10-28 2T.

My motherboard is on qualified list by G.SKILL to run this memory on XMP profile (G.SKILL- World leading DDR3 computer memory and SSD manufacturer -Products) and I ran Prime95 Blend and 3DMark11 Physics test just fine.

What could be the problem here?

Your motherboard may be on GSKILL's QVL list but I bet your CPU isn't. See the "performance warning" about your CPU on the GSKILL RAM page (that you linked to). Good luck.

I don't understand what you mean. It says, "Note: Recommended Intel Core i7-3770K processors & Core i5-3570K processors for best performance".

I solely bought this memory because I thought it's one of the best 16GB kit for 3770K.

partogi said:

I don't understand what you mean. It says, "Note: Recommended Intel Core i7-3770K processors & Core i5-3570K processors for best performance".

I solely bought this memory because I thought it's one of the best 16GB kit for 3770K.

Click to expand...

I am really sorry that I misread that statement in RED. I thought it said Not Recommended For... So sorry about that. Anyway, wait until you get to be an old fart like me and you'll see how easily that mistake can be made. Why, I even misread it with my Mr. Magoo reading glasses on.

Haha, it's OK.

Anyway, I'm currently using 2133 @9-11-10-28 2T settings right now and will obviously be glad if anyone could help me to use 2400 XMP profile without problem.