Ram running at 1333 instead 1600

Hi. I have Corsair Vengeance DDR3 8GB 1600MHz on ASUS M5A99X EVO R2.0. In all programs I'm checking looks like they are running at 1333MHz instead of 1600MHz. I searched on Tomshardware and found that I should setup in BIOS/UEFI memory at 1600MHz. I've done that and works fine, works fine until I power it off and back on. No changes after restart, only after powering off.
Build computer myself for the first time and I'm worried that I'm doing something wrong.

Thanks for help guys!
4 answers Last reply
More about running 1333 1600
  1. Some boards default to 1333, especially Intel. You can check for a manual setting for the ram in the bios. You may be able to set it to 1600 in manual mode. Remember also that there are dozens of ram models available, so the motherboard can't accomodate them all. If you can't figure out to set it at 1600, relax. Ram is backwards compatable for speed. If your system is running well at 1333, that's ok. No harm done. If you have a manual setting, look for "auto" in the ram setting and change that first to manual to get a list of available speeds for the ram. Some are listed as half the actual speed. So 1600 might be listed as 800. Cpuz, a small monitor file, also lists ram speed as half the actual speed.
  2. I'm using AM3+ motherboard. Motherboard can support 1066 MHz, 1333 MHz, 1600 MHz, 1866 MHz, 2133 MHz. My ram sticks are defo 1600 mhz. I can change it in UEFI from AUTO to MANUAL no problem. Changed to 1600 mhz restart - works fine at 1600mhz. Turn it off and back on - back to 1333 mhz...

    Yeah computer runs fine, it's just I paid for 1600 and I would like my memory to run at that not less....if possible... :)
  3. could be a bios problem see if there is an update? i know my am3+ msi board i had worked just fine when changing it to manual.

    just a thought are you overclocked? do you have the overclock genie thing on. if so it sometimes underclocks your ram so you can up the fsb. i had that problem when it was on

    also good choice in ram :D i have the exact memory in 1866
  4. If set to auto check the FSB Frequency of your cpu if your cpu FSB is below 1600mhz its normal the motherboard downclock the frequency of the ram to match the FSB of your CPU even your motherboard support upto 2000mhz ram
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