HP dc 7900 sff memory update

Hello, this week the team here helped me to update my BIOS for my Compaq HP DC 7900 SFF. I have four available memory slots, and the computer's specifications say that it can have a total of 16 GB of memory. I could not find the specifications of the type of memory should I use.

Can anyone here point me in the right direction for a memory upgrade?

Thank you in advance,

Peace,

Mark

Thank you as always, I paid 90 million dollars for the dc 7900 with 4 GB of ram, burner light scribe, two core 8400 processor. 250 GB hard drive, only really bad thing is that each of the modules 4 memory are a different speed, and it comes up as unknown. I think that this computer can only run as fast as the module of memory of slowese. I'll probably get 4 GB memory and keep it for now, it works great and I like it better than my gateway 560 Gr. I am running windows 7 ultra 64-bit. and I'm happy. I think that if I change the memory, it will peform better year and the next update to the hp 8200. They go for about $300 used on e - bay, and hp/compaq has always been my brand.

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