computer not starting with 1866 memory speed

khan_g · Mar 25, 2013

my system specs are
i5 3450
asus p8b75m-lx
4gb corsair 1866mhz ram

my system run smoothly when memory clock is set to 1600mhz but when i change it to 1800mhz or 1866mhz in bios
the computer dosnt starts and after restarting it says overclocking failed please reset your setting
what am i doing wrong.
i am new to overclocking

matt_b · Mar 25, 2013

Are you running the voltage to your RAM modules at the specified amount you RAM states to run it at to get 1866 stable?

Cons29 · Mar 25, 2013

what speed does your board supports? you are probably oc'ing the ram, hence the behavior. and you wont even notice the difference of 1600 vs 1866 probably

ubercake · Mar 25, 2013

First, make sure your BIOS is updated with the latest available version.

You probably need to enable XMP profiles in your motherboards BIOS rather than manually OC'ing.

swifty_morgan · Mar 25, 2013

if you start messing with voltage be careful. jacking it up to 1.6v that some 1866 ram requires can ruin your processor. I would settle for 1600 and don't destroy your investment.

ubercake · Mar 25, 2013

Do you have your RAM model available?

khan_g · Mar 25, 2013

ubercake :

its vengeance , probably CMZ8GX3M2A1866C9. shopkeeper sold me single 4gb ram from the pair of 2

matt_b · Mar 26, 2013

Just from the way you've worded it, it sounds like you are just changing the frequency/speed of your RAM and nothing else. Your motherboard supports a high clock speed, so no problem there. Are you using an XMP profile to change the RAM settings? Verify that your RAM, per Corsair if in fact this is the correct part number, is running at not only 1866, but also timings of 9-10-9-27 at 1.5 volts.

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