RAM and BIOS

Maybe you have a problem im memmory parity there. If you have it, consult your motherboard manual to check if you need to install always the memmory modules in pairs or not.

I'd first try a simple test: remove the old memmory card and leave just the 1GB one. Then try and see if it reads the 1GB. If so, its more likely that the two guys wont talk to each other, and they're doing so just for the first 256 MB of both (the same size as the one in slot 1).

I tried using just the 1GB, and the computer wouldn't even work

Did you just remove the 256, or move the 1 gig to slot #1, where the 256 was? If you only have one memory it needs to be in the first slot.

I moved the 1GB to #1, and the PC wouldn't boot up, but it got to the bios, saying that it had half a GB, and then it froze.

Either you RAM is defective or far likelier, it's a BIOS problem. Check the motherboard manufacturer's website for your make and model of motherboard, then download the recommended upgraded firmware and flash software. Follow the manufacturer's instructions EXACTLY when flashing the BIOS, and NEVER shut down the computer or cut off the power when doing so, otherwise your computer will be dead.

That, or check the BIOS settings for the required RAM type and clock-speed.

As a rule of thumb, it is always reccomended that all RAM sticks on a given motherboard be identical (maker, speed and model) and in compliance to motherboard FSB specification, in order to run smoothly and avoid occasional random reset of the PC.

Such mishap may result, which if occurs when HD is in write mode, may render it un-formatteble due to head-crash.

1st, check with the manufacturer that the mobo supports the amount of memory your trying to install, in some cases a BIOS upgrade cannot help you, or the memory type is unsupported.

Generally, you'd run the larger stick in slot 1 and the smaller after the big ones (used to be faster on the older mobo's doing it this way.

Recognising the 1G stick is meaningless if the program reads the data directly from the memory slots I2C memory device, it just tells you whats in there, not that the mobo is capable of running it.

Hi Bondy,

Realy sounds like your bios is in need of update. heres a link to your MOBO mnf although it does not kike your MS-6724 number

http://global.msi.com.tw/index.php?func=searchresult&keywords=ms-6724

Sorry cant help more.

It seems like we just had this thread a few days ago.

You have to put the larger RAM stick in slot 1. If you have a smaller stick in slot 1 then it will read all the other sticks no matter how large they are as being no larger then the first stick.

I don't think it matters if you're using DIMM, but SIMM you need to have the largest one first.

True, SIMM or DIMM. The instructions with the module should have told you (him).

No, the larger one is first, not sure if it is SIMM or DIMM

I can't find an update driver for the BIOS though...

SIMM = Single Inline Memory Module

DIMM = Dual Inline Memory Module

Single/dual is not referred to as the BGA's on the PCB stick, but the arrangement of the gold contacts on the edge of the PCB.

Single Inline has the same electrical connection on both sides, these generally lay down in the slot, the Dual has a electrically isolated pair on either side and these connect in the now more standard vertical (as opposed to laying down on the mobo)

It is SIMM memory

How many pins/pads?

184

Its a DIMM

32, 72 pins are SIMM (hole connecting the pad on both sides)

168, 184, 200 are DIMM

168 = the early ones like PC-100/133 these have 2 slots in the connector edge strip

184 = DDR400

200 = DDR2 (I think it is, none on ,my desk to verify, but the slot is different too)

??? = DDR3 havn't seen these yet