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memory is 1600 but only performs at 1333?

Tags:
  • 1600
  • p8h77-m
  • 1333
  • Desktops
  • Overclocking
  • Memory
  • Asus
  • ai tweaker
Last response: in Memory
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October 12, 2014 12:49:15 AM

I have this desktop a year ago.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
It came with 8gb ddr3 1600 (2x4gb sticks)
The motherboard is labeled "P8H77-M PRO/CM6870/DP_MB"

I recently upgraded the ram to 16gb by way of 2 new 8gb sticks (setting the old ones aside). I am also wanting to get another pair of 8gb sticks if they are still in stock in a month or so.

I bought this ram.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Its speed is rated at 1600 (same as what came with the desktop).

The install went fine and shows that I now have 16gb ram installed, but the speed of the ram shows to be 1333.

I have heard that the xmp profile will need to be enable in the bios under the "ai tweaker" tab to get the 1600 speed. there is no ai tweaker tab in my bios. I then upgraded the bios to the latest version on the asus website. there is still no ai tweaker tab.

my next move will be reinstalling the original ram to see if it actually performed at 1600. if so, why would it run at 1600 and my new ram only run at 1333. if the original ram doesnt perform at 1600, why would the desktop come with it, and advertise it as 1600? Thats kind of like a car commercial saying "hey, buy this car! it gets 80mpg." but when you get the car it doesnt get 80mpg. you ask why it doesnt get 80mpg and they say, "it can if you buy a different engine"

I would like to get this resolved before I purchase more ram. If my motherboard will only support 1333, I may sell these sticks and find some that are 1333.

Also it was kind of weird finding the bios download. on the asus website, i looked up my motherboard (P8H77-M PRO). when i tried to upgrade the bios via the latest file associated with this motherboard, it said that the file didnt match the current bios. so i then looked up the desktop (cm6870) on the same website and it had a separate list of bios to download. i downloaded the latest and it allowed me to upgrade the bios. it was originally 0408, now it is upgraded to 0708.

More about : memory 1600 performs 1333

October 12, 2014 1:32:24 AM

Been there, read that. The problem is that there is no AI tweaker tab. It shows main, advanced, monitor, boot, and tool. the ai tweaker tab is missing.
!