Not all RAM showing ?

[Kilauea]

In an older P4 computer, there is 3 sticks of 512mb installed however when I go into system informations, it says only 512mb is installed, with CPU-z, it correctly states there is 1536mb of memory. What should I trust ?

[LarkStarr]

the P4 might mean you're using rambus?

if you have a dual channel rambus board (most likely) then you need to install the ram in pairs.

[Kilauea]

Originally Posted by LarkStarr

the P4 might mean you're using rambus?

If you have a dual channel rambus board (most likely) then you need to install the ram in pairs.

That might be the case, but I doubt it, because I only have 3 RAM slots and if I remember right, previously with 2 RAM sticks, I tried all the slots with no success, so I thought 1 stick was defective.

Anyhow, I will look into it...

[MarkOne]

Originally Posted by LarkStarr

the P4 might mean you're using rambus?

if you have a dual channel rambus board (most likely) then you need to install the ram in pairs.

WAIT a minute. Sorry to tell you but , most likely it WILL NOT BE RAMBUS ..... the rambus was use only on the 850 chipset of Intel if my memory is good ....

[LarkStarr]

OH. x.x

I'm sorry, for some reason I took it as system information could see 2 of the sticks XD, hence my pairing (and rambus) reasoning. clearly I haven't had my coffee yet today.

check the task manager's performance tab, see how much memory the computer is actually using.

[kendallcschm]

Originally Posted by MarkOne

WAIT a minute. Sorry to tell you but , most likely it WILL NOT BE RAMBUS ..... the rambus was use only on the 850 chipset of Intel if my memory is good ....

I agree... It's probably the slots themselves... A tech I spoke to suggested that u check the bios and see what it says...

[Kilauea]

Originally Posted by kendallcschm

I agree... It's probably the slots themselves... A tech I spoke to suggested that u check the bios and see what it says...

But why would CPU-z say there is the correct amount of RAM ?
Based on the task manager, there is more than 512mb of RAM, I would think 1024 shows there.
However, in the Bios it says "DDRAM at DIMM#: 3, " (it actually says it twice)

[LarkStarr]

maybe just try swapping out the stick to at least determine that it's not an actual ram issue? it sounds like a mobo/bios/windows mess up to me. you only have 3 slots for ram? with motherboard do you have?

[Kilauea]

The mobo is an MSI MS-6547, wish I could get a slightly better mobo for very cheap so I could put this "better" P4 chip in, but :(

[chrisk]

Try running memtest86+ and see if all the ram shows, and if there are any errors. One pass should be enough.