Memory: PC133 vs EDO

[Kelemvor]

I have an old Soyo MB for my P3 733 and it's a 133Mhz board. I have a 128 meg chip of PC133 memory. I also have two 128 meg chipcs that are EDO memory. All the chipcs are DIMMs I can physicallt put them all on the board.

Is there any problem with doing this? I realize that the PC133 chip would theoretically run slower at the EDO speed but is that all that would happpen? Is there any reason that doing this woudln't work?

 

[Boonesmi]

i could be wrong, but im pretty sure the chipset will need to support edo for it to work

if you know the model# for the mobo you can look up the chipset and find out if it supports edo ram

 

[ChefJoe]

Umm, what board is this ? Skipping the whole PC100 generation seems like it'd be hazardous to think things that fit together belong together. I say go with PC133 .

 

[chilled]

EDO was around with the firt Pentiums (I had it in my P120)

Are your SURE your board can support both P3's and EDO ram? I can't recall any did!
But if it does, go with SDRAM by a long shot.

 

[Blain]

There are some EDO DIMMs out there. But they come in two flavors... 5V & 3.3V

Which Soyo MB do you have? I don't see any 133MHz MBs that support EDO.
There are several that support ECC.

 

[AWhackWhiteBoy]

Originally posted by: ChefJoe
Umm, what board is this ? Skipping the whole PC100 generation seems like it'd be hazardous to think things that fit together belong together. I say go with PC133 .

lets not forget pc66 too. if the computer takes a P3,it definatly won't support EDO. the last time EDO was used it was in systems with early Pentium 2s and K6-2s

 

[Kelemvor]

Well unfortunately the memory isn't labelled very well and I don't know the specs on it because I think it was extra memory I got from work.

Found a lik to somewhere that has the memory. $500 for a chip? That can't be right can it? If it is I guess it'd heading to eBay. heh.

http://hardwarecentral.dealtime.com/xPO-Visiontek_128_MB_EDO_RAM_56065_0

 

[Kelemvor]

Ooo, Just found the manual for this thing. Wow.

It's a Soyo SY-7VBA 133 (no letter on the end)

Looks like I can use EDO / SDRAM / VCM SCRAM and either PC66, PC100, or PC133 depending on a setting in BIOS. I guess that answers my question. Heh heh.

But hell, anyone wanna buy these 2 chips for $500?


Also if anyone can help me figure out why when I install Win2k it installs from the CD fine but then won't boot off the HDD, please see my other thread here: http://forums.anandtech.com/messageview.cfm?catid=27&threadid=1286656

 

[Blain]

Yes, $500 for an EDO DIMM is insane... Google "EDO" "DIMM"

 

[AWhackWhiteBoy]

normal EDO is 72 pin, the only use for 168pin EDO i've ever seen was in a Dell server i had that took dual first generation Pentium 2s.

EDO was pushed out of the way due to its obvious lack of speed and cost to make.

you can get a generic 512meg stick of pc133 for $55, asuming your motherboard uses a chipset that supports high density sdram.