why does it in cpu-z software does it show my memroy at 333mhz instead of 667mhz. memory is pc2-5300.?

Answer 1

James is pretty much close to right, although RAM no longer has to run at the FSB speed. In fact, unless you are overclocking it is running faster than the FSB speed, there are no desktop processors with 333Mhz FSB yet. The reason for the difference you are seeing is that all DDR memory, DDR or DDR2 s double pumped, meaning it sends two pieces of data per clock cycle. So it actually runs at 333Mhz, but effectively runs at 667Mhz. When being marketed, the double pumped speed is quoted, but CPU-Z detects its actual speed.

Answer 2

Your ram is running at 667mhz. The speed at which ram operates is the speed of the FSB. The speed rating of the ram (667 in this case) is double what you actually get to run it at (FSB). So PC 6400 800Mhz Ram will run stock at a FSB of 400mhz.


Try this for some back ground on Ram and how it's rated.
http://en.wikipedia.org/wiki/DDR2_SDRAM

Peace,
James

Answer 3

because it's running at 667MHz. cpu-z for some reason only shows half a clock timing instead of a full clock.
By the way, is pc2-5300 anything like DDR2 667 or PC5300?

Answer 4

Me thinks you have 2 modules running in dual channel...333 + 333 = 666 (close enough to 667 right? lol)





then again I could be wrong...I'm just learning about overclocking and all the system timings and such myself. Also just because your RAM is rated at one speed doesn't mean it will run at that speed on your motherboard if your motherboards FSB isn't fast enough...from what I understand the FSB speed is what your RAM speed will be as well...can anyone confirm or correct that? -_-

Edit: I like mysticmans answer so far...he may have proved us all idiots lol

Answer 5

Because it most probably is running at 333 mhz. Set it in the BIOS. All BIOS are different, but you'll eventually figure out where to set it. If you're not overclocking your CPU, you can set it at the maximum speed. If you are, set it at a speed one step lower since overclocking your CPU means you're OC-ing the memory as well. Can't make it work beyond what it's supposed limit is, can we? :D

Answer 6

your machine uses so-dimms.