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#1
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Presario needs memory
I have tried a number of memory sticks in my Presario 4540 and the only one
that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#2
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Go to www.crucal.com and use the configurator for your model. Odds are
you're trying high-density memory and it only supports low-density memory (if MY memory serves). Tom "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#3
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LOL or... www.crucial.com
"Tom Scales" wrote in message ... Go to www.crucal.com and use the configurator for your model. Odds are you're trying high-density memory and it only supports low-density memory (if MY memory serves). Tom "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#4
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Here's what I found:
System Information Maximum memory: 48 MB Standard memory: 16 MB (non-removable) + 0, 8, 16 MB (removable) Slots: 1 socket Your Compaq Presario 4540 only supports modules made with a specific type of chip. Jeeeeez! "doS" wrote in message ... LOL or... www.crucial.com "Tom Scales" wrote in message ... Go to www.crucal.com and use the configurator for your model. Odds are you're trying high-density memory and it only supports low-density memory (if MY memory serves). Tom "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#5
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That's pretty common. Anything over 2-3 years old won't support double
density chips -- not just Compaq. "Michael Abraham" wrote in message ogers.com... Here's what I found: System Information Maximum memory: 48 MB Standard memory: 16 MB (non-removable) + 0, 8, 16 MB (removable) Slots: 1 socket Your Compaq Presario 4540 only supports modules made with a specific type of chip. Jeeeeez! "doS" wrote in message ... LOL or... www.crucial.com "Tom Scales" wrote in message ... Go to www.crucal.com and use the configurator for your model. Odds are you're trying high-density memory and it only supports low-density memory (if MY memory serves). Tom "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#6
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OK, here's the skinny on the 4500s, memory wise. You need to find PC66
SDRAM. Some PC100 DIMMs will work, but not many. Crucial does not list memory for the 4500s for that reason. Try he http://www.computersurplusoutlet.com...subcategory=26 They list a 32MB PC66 DIMM for $3. HH "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#7
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you're trying high-density memory and it only supports low-density memory
(if MY memory serves). Might it require EDO? I don't remember... Dale |
#8
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Nope. 4500s need PC66 DIMMs. Very few PC100s will work.
HH "DEJ57" wrote in message ... you're trying high-density memory and it only supports low-density memory (if MY memory serves). Might it require EDO? I don't remember... Dale |
#9
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I had the same problem with a Presario 4540 when I replaced my 16 MB chip
with a 32 MB chip 7 or 8 years ago. The base problem is that the motherboard requires memory modules with SPD - Serial Presence Detect. The idea behind SPD is that the memory stick had an extra EPROM chip on the stick that was able to identify itself with the mobo. When the power was turned on, the motherboard received information about the memory stick type by reading the information from this EPROM. At the time I thought it was a very forward-thinking idea from Compaq. At least, that's what I thought until I tried several different 32 MB chips and none of them worked because the more standard memory sticks didn't have these little fancy self-identifying EPROMs. If there was a way to disable this using the BIOS or a jumper setting, nobody knew it at the time. I ended up purchasing memory directly from Compaq because that's the only place which sold chips which contained SPD. The cost was not cheap - it was about 4-5 times higher than other 32 MB chips at the time. And as someone has already pointed out in this thread, that model has 16 MB of build-in memory and only a single DIMM expansion slot taking a max of 32 MB. So even if you purchase a 32 MB chip to replace your 16 MB chip, you're going to max out at 48 MB and have a 16 MB loose keychain left over. That was such a racket. I look for those types of things now when I purchase systems. -Jack "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
#10
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Most SyncDRAM DIMMs today support SPD. The issue with the 4500s was a timing
issue. PC66 (10-12ns) DIMMs were required. Very few PC100 (8ns) DIMMs would work. Kinda hinky, I know, but true nonetheless. HH "Jack Cooper" wrote in message ... I had the same problem with a Presario 4540 when I replaced my 16 MB chip with a 32 MB chip 7 or 8 years ago. The base problem is that the motherboard requires memory modules with SPD - Serial Presence Detect. The idea behind SPD is that the memory stick had an extra EPROM chip on the stick that was able to identify itself with the mobo. When the power was turned on, the motherboard received information about the memory stick type by reading the information from this EPROM. At the time I thought it was a very forward-thinking idea from Compaq. At least, that's what I thought until I tried several different 32 MB chips and none of them worked because the more standard memory sticks didn't have these little fancy self-identifying EPROMs. If there was a way to disable this using the BIOS or a jumper setting, nobody knew it at the time. I ended up purchasing memory directly from Compaq because that's the only place which sold chips which contained SPD. The cost was not cheap - it was about 4-5 times higher than other 32 MB chips at the time. And as someone has already pointed out in this thread, that model has 16 MB of build-in memory and only a single DIMM expansion slot taking a max of 32 MB. So even if you purchase a 32 MB chip to replace your 16 MB chip, you're going to max out at 48 MB and have a 16 MB loose keychain left over. That was such a racket. I look for those types of things now when I purchase systems. -Jack "Michael Abraham" wrote in message rs.com... I have tried a number of memory sticks in my Presario 4540 and the only one that works is the original Compaq memory supplied with it. But who can live with 32mb? Help! Does only Compaq memory work in this thing? Thanks -- Michael Abraham Toronto, Ontario Canada (416) 654-2272 |
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