BleepingComputer.com: Ram

Hi


Can any body Explain to me the CAS latency number in Rams also Should number be lower or higher for DDR2 Rams?

The lower the number, the better.

Quote

Hi


Thanks but I have already been through wiki


Gaming Rams from Gskill have high numbers but are DDR3 so am confused


Lets say I upgrade 1 more gig of ram does the CAS number has to be same or lesser the better

Latency in any system is a measure of how long it takes after a request for data until the data is present to be read. The lower the number, the shorter the wait, so lower latency = higher performance.

If you're adding to existing memory, aim to get the same latency specification if possible, or lower if you want to allow for future matching. If new memory has lower latency, it will be run at the higher latency setting (more waiting) to match the current memory. If you bought RAM with higher latency, the memory you have now would then be run at the slower latency to match it. If you are replacing the RAM entirely, getting lower latency will maximize performance, although how much depends on what you're doing.

It's common to see higher latencies on newer designs of memory. An older type is at the end of its development cycle, is not going to higher clock speeds and is well worked out so latency can be pushed harder. Newer technology is developing, not yet getting a high yield of top performing parts and is advancing clock speeds, so low latencies are expensive for a given clock speed, and general spec RAM shows higher latency.

Hi


My current is PC2-6400 Latency 6
as in Ram one is from Samsung other from Ramaxel Technologies 1 Gb each



i have a 32Bit Vista Home My problem is I not able to get same Latency Rams

GsKILL Has one but it seems as though they only sell a 2x1 Gb pack or 2x2 GB

If i do add 2 more Gigs won`t it be a waste as 32 bit O/S can`t optimize more than 3.2 Gigs?

Yes it would be a waste if you get 4GB of ram unless you change to 64bit windows.

Thanks

It is also recommended that you do not mix memory types or brands. If you want true performance try and get dual channel kits if available, and if you are unable to get that try and order from the same brand/manufacturer.

For example, if you have 2 sticks of Kingston ValuRAM at PC2-6400 and you see a sale for Corsair PC2-6400, it is advisable that you do not purchase then Corsair unless you are planning to replace your Kingston ValuRAM with Corsair. Then at that time, you should purchase 4 sticks for Dual Channel Support or in the case of DDR3 and Triple Channel purchase your RAM in triplicate. By this I mean if your board has 6 slots for RAM then all slots should be filled with the same type of RAM.

Hi


The system came with 1 Gb memory I requested Hp they upgrade so,

One memory is from Samsung other from Ramaxel What should I do?


Request hp again?

I would recommend heading to http://www.newegg.com if you are in the USA to get your RAM.

Thanks I`m not in USA in India

Then reach out to one of your local computer stores and see if they sell paired kits.