Ram Info And Oc

[Ximo]

I have a DDR333 512......

Does that mean that the ideal fsb speed should be 166.5 x 2???? or si that something els??

and if the cpu and rm are synced how do i overclock it???

 

Thanx

 

ps: what does the PC3200 thingy mean

[justinal]

so is the memory pc 3200 or 2700

[Trakfast11]

i'm not going to get into the decimals that the ram operates at (ie: 333.33Mhz) since different motherboards may have a slightly different decimal for the frequency, although most boards that use the same chipset have the same frequency to the first decimal point.

 

DDR333 means that the ram is Double Data Rate, and effectively operates at 333Mhz. The actual fsb frequency is 166Mhz. and yes, you are correct in saying that 166.66x2=333.33.

 

Does that mean that the ideal fsb speed should be 166.5 x 2????

this is not as much the ideal frequency as it is the manufacturers specfied frequency. ram usually goes into one of the categories. either PC2100, PC2700, PC3200 to fit into the JEDEC standard. other memory modules labeled as PC3000, PC3500 ,PC3700 are all non JEDEC standard products at this time.

some ram may operate stably at higher frequencies while still at their default voltages (usually a vdimm of 2.5v +/-.1v, but higher frequency modules such as PC3700 have theirs at 2.7v +/-.1v)

and if you choose to, you can overclock these modules, but this may void your warranty. Some modules allow are still covered at upto 2.9v vdimm ( ie: OCZ EL DDR PC3700 256MB Gold) while others may have it a different vdimm range allowed.

 

 

PC3200 means that the ram will be able to run at DDR400 or 200Mhz.

if you divide the 3200 by 16 (3200/16=200) you find that this memory is made to operate at 200Mhz.

The others may be an approximation. (ie: PC2700 2700/16=168.7Mhz, but is labeled to operate at 166Mhz)

PC3000 is made to operate at about 187Mhz.

3500/16=218.75Mhz, the actual frequency is 217Mhz.

 

so dividing the PC---- by 16 will give you the approximate frequency that the memory module is specified to operate at.

[Ximo]

so it means i have a PC2700???

(ie: PC2700 2700/16=168.7Mhz, but is labeled to operate at 166Mhz)

or how els can i find out???

[Trakfast11]

so it means i have a PC2700???

is that what it is labeled as on your memory, or packaging?

or what does the label say?

 

if you're asking about DDR333, then yes. that is also called PC2700

[Ximo]

the lable does not say anything cuz i bought it at a store and it was some type of "normal" ram...not of any fancy company.... and it came in a cardbord box so it does not say... is there another way to find out??

[Trakfast11]

is there a headspreader over the memory chips? if not then you might be able to check for the ns on the chip, and get a better idea of what frequency this ram was made to run at. (i say better idea because some companies may have a chip that has a low ns, but label the chip for operation at lower or higher frequencies).

 

6ns

1000/6=166Mhz

 

the labeled ns isn't always a guaranty that manufacturer made the ram to operate at that speed, but atleast you'll have a much better idea of what to expect.