Upgrading Memory

[BeyondHatred]

Hello, I currently have a Dell Xps 720 and am looking to purchase more ram. I currently have two 1 gb sticks filling 2/4 of the slots and was thinking about purchasing two 2gb sticks to fill the remaining 2 slots, however, I am unsure whether I can use two 1gb sticks and two 2gb sticks or if I can only use either four 1gb sticks or four two gb sticks. Any help would be appreciated, thanks.

 

[Hefemeister]

Each memory slot can hold DDR2 PC2-6400,DDR2 PC2-8500,DDR2 PC2-5300 with a maximum of 2GB per slot.*

Computer memory upgrades for Dell XPS 720 Desktop/PC from Crucial.com

what speed is your current ram? If you do not know cpuz will tell you. CPUID

Max memory is 8gb so you could use all 6gb keeping in mind the ram will only run as fast as your slowest stick installed. Also keep in mind in order to use more than 3.5gb of ram you will need to have a 64bit OS installed. You can install more ie 4gb but windows will not be able to use all of it.

 

[BeyondHatred]

My current ram is 400 MHz.

 

[Hefemeister]

being ddr2 ram I would assume you mean DDR2 800 (PC2 6400).

That is a fine speed. If you have not chosen any yet this would be some nice ram.
Newegg.com - G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ - Desktop Memory

Now are you running a 64bit operating system?

 

[BeyondHatred]

I already ordered 2 sticks of 2GB (1X2GB) PC25300 NONECC UNBUFFERED 240 PIN DDR2 DIMM RAM Memory Upgrades and I was planning on upgrading my vista 32 to a windows 7 64 asap.

 

[Hefemeister]

Any chance of canceling that order because the ram I linked is faster, better and $30 cheaper.

 

[BeyondHatred]

It already arrived, however, I can return it with a 20% restocking fee, would that be worth doing do you think?

 

[Hefemeister]

20% restocking fee would make them pretty close in price, plus the hassle. up to you.