Is it ok for me to use two RAM cards with different memory capacities on my motherboard?

My motherboard specs are


* Four 184-pin DDR DIMM sockets


* Up to 4GB memory


* PC3200/PC2700/PC2100


* Unbuffered non-ECC DDR DIMMS





Right now I have 512MB. If I get a 1GB RAM card can I use both at the same time? My Computer Supplier says we cannot do that.

Is it ok for me to use two RAM cards with different memory capacities on my motherboard?
Yes it is absolutely fine to have 2 RAM cards with different memory capacities... but make sure that they have SAME FREQUENCY of operation... otherwise it will slow down your computers processing.
Reply:Yes you can use, but be careful in which frequency the two rams are operating.if the frequency varies the computer wont work properly
Reply:Lot of good ans. here, sounds like you people know more then me. My advice on memory is to install the largest one in the first slot and the smaller one next to it.
Reply:yes. but try to get the same bus speed.
Reply:yes but your pc will operate at the slowest ram speed
Reply:ya you can use them, but i read some wehere that if you have to different sizes of ram in you comptuer, it will run at the spped of the smaller ram but windows will add up their sizes and show you that its combined like in you case it will show your ram size at 1.5gb or 1536mb.but will actually run at 512 mb.
Reply:what kind of motherboard is it. and is the RAM you have spitl into two 256 sticks. check the board specs at the manufactures site, soem boards dont handle it well. I would trust my supplier and buy another 512 stick if you only have one right now.