I have a HP a320N. i just upgraded the ram in it.It came with 512mgs and I replaced one of the 256 modules with a Kingston 512mgs. Now the computer starts to reboot itself I was online doing a long download and off it went. is there a test i can do to see if the new memory is bad? Or do I have to but in matching ram i.e 2 512mgs in each slot.(someone had mentioned that might be problem but can find no mention of it in the owners manual.)
Thanks
ray

Sometimes diffrent memory types dont like eachouther and will make the system unstable. You didnt specify what kind of RAM your useing.

I am using 256Mg od PC2700 DDR in one slot and 516 mgs of the same in the other slot.
Ray

HP, among other name brand computers can be fussy about memory. It isn't always about better quality either. The point is that you need to install memory that is certified to run in that machine. The original memory is DDR2700. That is the starting point. I would recommend that you go to Crucial.com and use thier memory configurator. That will assure you of compatible memory. Kingston may have a similar service, I don't know. Most memory comes with a lifetime warranty. You should be able to return the memory for a refund. One thing that you might try before all that is to check to see if the new memory is in the first memory slot. If not move it there. This is just another reason why most folks that help here have problems with the way HP, Gateway, Etc. build thier machines. Your computer has only 2 memory slots and it came with both filled. This means that you now have 256MB of memory on the counter.

Actually, the computer came with 516 mgs of ram. i bought a new kingston 512mg module which means I would have 768mgs if the memory works. I put the old module back in and it works ok, so it seems to be the new memory after all. Does moving it to the first slot really help? If so, why? I knew I should ahve bought a diffrent machine. I will give it a shot or have to wait until BEST BUY gets more in.
Thanks
Ray