Wont boot up

Sounds like you bought the wrong kind of memory. It should be DDR PC2100 and it must be ECC (Not None Ecc).

Take a look at this site.

http://www.4allmemory.com/memory/compaq-hp-workstation-xw6000/

You can upgrade, have a look at the specs;

Pavilion ze4910us Memory Specifications Standard Memory 512 MB (removable) Maximum Memory 1.0 GB Memory Expansion 2 sockets Memory Comments PC2100/2700 DDR SDRAM SODIMMs CPU Type 1.4GHz Intel Celeron M 330 Model Comments 400MHz FSB Memory Upgrade for HewlettPackard Pavilion ze4910us Laptop, the HewlettPackard Pavilion ze4910us Laptop takes the PC2100/2700 DDR SDRAM SODIMMs Memory Type, and comes installed with 512 MB (removable) of Memory. You can upgrade your HewlettPackard Pavilion ze4910us Laptop to up to a maximum of 1.0 GB Memory, the system has 2 sockets to install Memory, already with 512 MB (removable) standard Memory installed. For best Laptop performance use the maximum amount of allowed Memory per slot for your Laptop.
Choose the following Memory Upgrade for HewlettPackard Pavilion ze4910us Laptop.

Hope that helps.

The 2 1Gb RAM are either the wrong type or they are incompatible.
Try to use the same brand and speed as the 256 Mb RAM that was installed in your Dell.

That motherboard was made for PC2100 DDR266. A PC3200 DIMM *SHOULD* be backward compatible. Depending on the density of the PC3200 memory you might have problems. If you have not bought the memory yet I would go with the PC2100 for sure since the PC3200 will give you no speed gains at all and will be running at PC2100 speeds anyway.

If you already have the PC3200 memory then I would say just give it a shot. The worse case scenario is your machine will not boot up with the higher speed ram installed. Assuming you take all the normal hardware upgrade care and do not physically break anything you can test this memory with no harm to your motherboard.

Hi there.
The best memory for that motherboard is DDR SDRAM, the supported ram speed is 266 MHz • 200 MHz(maximum 2BG, 1BG in each slot)
Kingston or corsair memory running at 266MHz is my recommendation to you. Try not to buy used memory as it may not work!!

Good luck and thanks for using Fixya!!

Your HP Pavilion can support up to 1GB of memory. PC2100

u just bought the wrong type of memory take the chip out of ur pc to best buy or a good computer store to help u buy the correct memory

You need DDR PC 2700 184pin memory. Your machine will support upto 2g.

You can buy this memory from anywhere at cheap prices.

Hope this helps
Regards

So it seems you got the DDR / DDR2 side of the equation correct, but unknown to most, there is 'low' and 'high' density memory.

The density of memory refers to the number of chips used to make the total amount of memory that your memory stick contains. e.g. High density memory has few, large capacity chips to make up the 1024MB of memory on the stick, whereas low density memory uses many, small capacity chips to make up the same 1024MB total on the stick.

Typically, if it is a low / high density conflict, it is the 'low density' sticks only that will boot.

Me, I purchase Kingston memory when I'm unsure what the motherboard will be, and it has never failed to work.

I fix computers.

1GB DIMM 184pin DDR PC2700
1GB DIMM 184pin DDR PC2100

1GB DIMM 168pin SDRAM PC133

www.tigerdirect.com or you can get a quote from me.