can't run ram in their full speed

[ahmed kha]

welcome !!

i have :

i3-4150

avexir 8gb of ram (2x4) 1600mhz

gigabyte b85m-ds3h-a

 

so when i run cpu-z i find the ram running in 800mhz

so i activate the xmp profile

and checked it again and i found it is still running at 800mhz

 

so what i need to do to make the ram running at 1600mhz?

 

 

[C2dan88]

DDR stantds for double data rate, so 800Mhz x 2 = 1600Mhz

[minibois]

2 minutes ago, ahmed kha said:

so when i run cpu-z i find the ram running in 800mhz

so i activate the xmp profile

and checked it again and i found it is still running at 800mhz

 

so what i need to do to make the ram running at 1600mhz?

Long story short: your memory is running at the right speed, if CPU-Z shows 800Mhz.

 

Long story a bit less short:

Your memory runs at 800Mhz, which is (millions) of ticks per second. Per tick it can do two transfers (which is why it is called DDR = Double Data Rate), so it is running at 1600MT/s (millions of transfers per second). Manufacturers of memory/motherboards call this 'MT/s' unit 'Mhz', thus 1600Mhz.

CPU-Z reads it out the right way, thus 800Mhz.

[ahmed kha]

14 minutes ago, minibois said:

Long story short: your memory is running at the right speed, if CPU-Z shows 800Mhz.

 

Long story a bit less short:

Your memory runs at 800Mhz, which is (millions) of ticks per second. Per tick it can do two transfers (which is why it is called DDR = Double Data Rate), so it is running at 1600MT/s (millions of transfers per second). Manufacturers of memory/motherboards call this 'MT/s' unit 'Mhz', thus 1600Mhz.

CPU-Z reads it out the right way, thus 800Mhz.

thanks

 

[ahmed kha]

16 minutes ago, C2dan88 said:

DDR stantds for double data rate, so 800Mhz x 2 = 1600Mhz

thanks

 

[Anus_McSphincter]

For some reason, I had to enable XMP in my Gigabyte BIOS twice before it actually took.  But it did.  Otherwise, "what they said".