Memory Rating

Easto · Post by **Easto** » Mon Feb 12, 2001 7:56 pm

When I purchase memory the Stats that I get from SiSoft Sandra show Pc 100-333-622. I know that it is rated as "Pc100" memory but what do the next 2 sequences mean. I also have some "Pc 125-222-622" ???

Thanks
Easto

Brent · Post by **Brent** » Mon Feb 12, 2001 8:22 pm

3-3-3 and 2-2-2 they are memory timmings

smaller numbers are faster

so the 2-2-2 memory is FASTER then the 3-3-3 memory...

the 3 memory timmings it's reffering to are:

1.) Ras to Cas
2.) Cas Precharge time
3.) Cas Latency

hence either 2-2-2 or 3-3-3

2 is faster then 3

Easto · Post by **Easto** » Mon Feb 12, 2001 9:56 pm

Brent, thanks. I had a pretty good idea that was what they were but just wanted to confirm

Thanks for the help

spellpump · Post by **spellpump** » Mon Feb 12, 2001 11:37 pm

yeah, he's right, but i dont't have any idea what the "622" is. maybe a model number or part number.

spellpump · Post by **spellpump** » Mon Feb 12, 2001 11:40 pm

another thing. if you're into overclocking, get more of the pc125 stuff and ditch the pc100. the pc125 will go 125mhz FSB, the pc100 only 100mhz FSB. FSB=basic speed of your computer, PCI and ISA and AGP divide this by a certain amount to determine their speed. the CPU or "Processor" MULTIPLIES this FSB speed by, say 4.5 and gets (at 100mhz FSB) 450mhz. at 125mhz fsb, it gets 562.5mhz Cpu speed. i hope i've actually helped you, and not confused you.

mjfmlv · Post by **mjfmlv** » Tue Feb 13, 2001 10:42 pm

the last 3 #'s "6-2-2" are 6=read data access time, 2=SPD chip revision, 2=design revision. also good quality memory is stable above rated speeds (overclocked), my Kingston PC-100 "2-2-2" runs rock solid at 133 MHz with no data loss. lower #'s are not only faster but more stable. most all of my old PC-66 sdram's run great at 100 MHz.
by the way the order of the 1st 3 #'s is 1st=CAS latency, 2nd=RAS to CAS delay, 3rd=Row precharge. some memory has different speed ratings for CAS2 & CAS3 settings in your bios, if you have problems go into your bios settings & change that setting (usually 3 allows higher MHz).

[ 02-13-2001: Message edited by: mjfmlv ]

Easto · Post by **Easto** » Wed Feb 14, 2001 12:35 am

Everyone, Thanks for the input. Since Mjfmlv knew what the last 3 meant I'll stick with this answer. I understand what's going on here, but I don't overclock. Anyway, what is "da kind" memory to buy for stability and performance.

Thanks again for the help
Easto