Enabling XMP Profile changes speed and then is automatically changed back to 1333mhz

sclebatty · Mar 21, 2014

i74770k @ 3.5
msi z87 gd65
corsair rm850
msi gtx780
corsair vengeance pro 16gb (2x8gb) CMY16GX3M2A1866C9R
crucial m500 240gb ssd

I am having issues getting my Corsair Vengeance Ram to run at its stated 1866 speed.

At first when I enabled the xmp profile in the BIOS after restarting the pc would seem to attempt to boot, fail and automatically reset the speed back to the default 1333 and then boot into windows as normal.

I then flashed the BIOS to the latest version. Enabled xmp profile and it booted into windows with the correct 1866mhz speed which I checked in cpuz. After shutting down and restarting however it looks as though it fails to boot for a split second ( I see the values of 99 and 9C in the bottom right hand corner) and then the speed is set back to 1333mhz automatically and it boots into windows.

Is there something obvious im missing here to get the XMP profile to work? I havent changed any other settings in the BIOS other than boot order and have tried clearing the CMOS and setting XMP profile but it changes nothing

smorizio · Mar 21, 2014

use cpu-z read the spd info for the xmp profile. check that the voltage and speed is set right if not try setting it yourself.

Gee Bee · Mar 21, 2014

don't use xmp, they are 1333 but rated\tested at up to 1866. Set manually.

the individual memory chips used on the Corsair Vengeance Pro modules carry the SpecTek memory manufacturer logo, which is a Micron subsidiary. According the their part markings (the PEB12 code to the upper right of the corporate logo), the chips are rated at DDR3 1333MHz speeds with 9-9-9 timings. The memory chips are designed in an FBGA (Fine pitch Ball Grid Array) type package with SpecTek part number PRN/SAA512M8V80AGDRH. Information concerning the memory chipset can be found in this memory chip component sheet on the SpecTek corporate site.

smorizio · Mar 21, 2014

gee bee is that not fraud??? your buying ram that says it 1866 speed but the chips are 1333 speed???

sclebatty · Mar 21, 2014

Thanks for such fast responses!

Im at work right now on a night shift

so cant say the exact timings but im sure that those listed under the xmp profile under spd tab matched the settings when it did boot into windows at the correct speed that one time.

I did look to set the speed manually previously but to be honest I was intimidated after opening up the DRAM timings section of the BIOS as I was expecting a simple listing of the timings however it seemend like it had 3 sets of timings. Also after as I set the manual mode to Link to enable me to open the DRAM timings section, opening the DRAM timings page everything seemed to go slow and the mouse movement was choppy. I'll try setting them manually when I get back home. Stated dram voltage to run at that speed was 1.5v so I shouldnt have to increase this as well as entering the timings should I?

Gee Bee · Mar 21, 2014

sclebatty :

Thanks for such fast responses!

Im at work right now on a night shift

so cant say the exact timings but im sure that those listed under the xmp profile under spd tab matched the settings when it did boot into windows at the correct speed that one time.

I did look to set the speed manually previously but to be honest I was intimidated after opening up the DRAM timings section of the BIOS as I was expecting a simple listing of the timings however it seemend like it had 3 sets of timings. Also after as I set the manual mode to Link to enable me to open the DRAM timings section, opening the DRAM timings page everything seemed to go slow and the mouse movement was choppy. I'll try setting them manually when I get back home. Stated dram voltage to run at that speed was 1.5v so I shouldnt have to increase this as well as entering the timings should I?

1866 MHz, 9-10-9-27, 1.5V

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Enabling XMP Profile changes speed and then is automatically changed back to 1333mhz

sclebatty

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smorizio

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Gee Bee

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smorizio

Titan

sclebatty

Reputable

Gee Bee

Honorable

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