Help needed figuring out what kind of memory I have

[easystreet]

POW Mem
94v-0
B6483B
TI-8
TMS626812BDGE
2H87A29OP
It is 32mb and the mb manual says it needs 168pin unbuffered DIMMS.........SDRam or EDO 3.3 volt
Where can I find info on this? I want to buy another 32mb but want it to be compatable with what I have.


Motherboard is MS-6117 ATX LX6 Mainboard for Pentium II Processor

 

[Mday]

it's PC 100 SDRAM, 8ns

 

[easystreet]

Ok........now for my continuing education how did you arrive at that conclusion from the info listed?

 

[Tonec]

"TI-8"

-8ns rating is standard pc100
-7.5 is pc133

The markings on your chip are not from any of the major memory manufacturers, mostly likely generic chips and pcb. sdram is 168pin
unless it is specifically stated other, sdram is unbuffered


what kind of mobo do you have. plus you may want to look into something other than a 32mb dimm, if this is your only dimm adding 32 for 64 total will still not be enough for win98 to run smoothly

 

[Ulysses]

1000/8 = 100 more or less 🙂

 

[dszd0g]

I have seen the 1000 / access time thing here a few times. It doesn't make any sense to me. The 100Mhz or 133Mhz is the bandwidth not the access time. 1000 / 8 = 125. Please explain this to me.

 

[JJ650]

would the "TI" mean Texas Instruments? You could go to there website and check it out there.

 

[easystreet]

^^^

 

[Ulysses]

One nanosecond (ns) is one billionth of a second, or 10^-9 seconds.

One megahertz (MHz) is one million cycles per second, or 10^6 cycles/second.

So for a RAM chip rated at 7.5 ns:

Chip Speed in MHz = [(1 cycle)/(7.5 x 10^-9 seconds)] / [10^6 cycles/second] = 133

or simplifying

Speed in MHz = [10^3 / 7.5] = 133

Very simple but a b!tch to type. I hope it's right. 🙂

P.S.
So a 7.5 ns chip should run OK at 133 MHz, but a 8.0 ns one will not, if the ratings are correct. The good news is that the ratings are a minimum, not a maximum.

 

[dszd0g]

Thanks Ulysses. One can use PCs for 15 years and build them for 10 and still learn some of the basics.