Why RAM reads lower .......

fort14

Reputable
Sep 18, 2014
9
0
4,510
I have a new RAM of 1333 Mhz as written on it ....
when i use it alone it gives me 533.2 Mhz (instead of 666.5 Mhz)

i used to use 2 RAMs :
1 st is 1024 mb and 1333
2 nd is 2048 mb an 1066
and i faced that problem " some times when i turn on the pc it enters to the bios instead of showing the motherboard manufacturing company name(Gigabyte),it shows only the the title of the bios without any details then restarts automatically three times to the bios before having a normal start. this problem is temporary and frequent (occurs 2 times per week)"

So:
1)What is the issue with the ram that reads less than written on it?
2)Is the use of 2 different rams can cause the problem,previously mentioned?
 
Solution
the 1gb 1333Mhz stick when paired with the 2gb 1066Mhz stick will slow down to the 1066Mhz speed. Running different speed and timing ram stick cause all sorts of issues as you can tell. Even buying single sticks from the same manufacture that have the same speeds and timings can cause issues. This is why they sell packs of 2, 3, 4 sticks, the sticks in the packs are guaranteed to work together.
the 1gb 1333Mhz stick when paired with the 2gb 1066Mhz stick will slow down to the 1066Mhz speed. Running different speed and timing ram stick cause all sorts of issues as you can tell. Even buying single sticks from the same manufacture that have the same speeds and timings can cause issues. This is why they sell packs of 2, 3, 4 sticks, the sticks in the packs are guaranteed to work together.
 
Solution
your 1333Mhz or (666.5) ram is running at the speed of the slower stick 1066Mhz (533.2) when both are installed. When you pull the 2048Mb running at 1066Mhz out your 1024Mb 1333Mhz stick is still running at the slower speed of 1066mhz till you go into the bios and tell it to run at the faster speed its ratted at.
 
If your running both sticks then the fastest your going to get is 1066mhz, if your only running the 1024mb stick you need to go into the bios and set the memory to what the sticker says on the side of the ram. I'm not sure where it is in gigabyte boards.