My board doesn't recognize all ram

Try putting the ram in another computer and see if you have the same problem. If the issue goes away one of the sticks of ram might not have been fully seated. If you get the same result you have a bad stick of ram. Go to the manufactures website and download ram checker and install it (free software). This will help diagnose your problem. If you get an error code write it down so you can give it to the manufacturer which indicates which error problem you have... If it turns out that you have a bad stick of ram contact the manufacturer and they may send you another stick of ram. Some manufacturers have a lifetime warranty on their ram. Hope this helps.

Yes! install your old ram, if you still have trouble return it to the place of purchase.

If you watch the memcheck during POST, you will probably see the fuill 2GB (as well as in the BIOS). However, because you have onboard video, the video "card" shares some of the system memory and as such it will not report that shared portion as available to the OS.

You Gateway only supports up to 8 GB. memory. Hence it will not see your 5 GB. dimms

tops: 8129 MB (8 GB.). 4- 2GB. Adding the maximum amount of memory will improve performance and help extend the useful life of your system as you run increasingly demanding software applications in the future.

Specs:

Installed: 1024 MB DDR2 (PC4200), 533 MHz memory (two 512 MB modules)

Expandable to: 8 GB (4 memory slots)

How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found at http://www.crucial.com/kb/answer.aspx?qid=4251.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response.

Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

"Supports up to 2 GB of system memory with DIMMs utilizing 512 Mbit
technology DRAM devices"-intel

you can use 2 sticks of 1 gig apiece to get to 2 gigs of total memory, but you have to make sure that the ram sticks use "512Mbit " technology.

the 512Mbit technology refers to the arrangement of memory chips on the ram cards. a card which uses 64Mx8 (8 seperate memory chips of 64M apiece) would be appropriate.

"Nearly all motherboards only recognize 1 GB modules if they are low density 64M×8 modules. If high density 128M×4 1 GB modules are used, they most likely will not work."-wikipedia"

your reader does not support the 8gb device, look for firmware upgrade for the reader

The original Blackjack will not recognize anything larger than 2gb. Sorry, but you just wasted buying those 4 gb. cards. I found this out the hard way too when I bought my daughter a 4gb card for her Blackjack. I have a BJ2 which will recognize the 4gb cards.

Older model printers won't recognize high-density memory cards.

2 gb is probably the largest to be used in your printer.

I had the same issue on this board where it came with a Samsung 512 MB 533 MHz PC2-4200 DDR2 DIMM. I put in a 1 GB Kingston with the same specs (533 MHz PC2-4200 DDR2) and it would not recongize the Samsung anymore with the system reading as 1 GB of RAM instead of 1.5 GB. Tried every configuration and would only see the Kingston. It would only see the Samsung if I pulled out the Kingston regarless of the slots I use. So, I just bought the exact same make/model of Kingston and it recognized that fine and the system now has 2 GB of memory (max this board allows). And, I had already installed the latest BIOS for this board from Intel before doing all this so wasn't an old BIOS. I'm figuring the board didn't like something about the Samsung memory (speed, module configuration, etc.) that made it not play nice with the Kingston. If interested I bought the DM8400A/1G Kingston modules. And, this board appears not to support dual channel memory. Only has channel A, slots 0 and 1, and I read need two channels to support dual channel (seems obvious). Boards that supports dual channel memory normally have 4 memory slots, two for channel A and two for channel B, then put in matching modules in slot 0 for channel A and B and have dual channel memory access. And if want more ram, then matching modules in slot 1 for channel A and B.

DG965WH Board works well with 533 RAM, but is very finicky about 800, if you use 800, use only what is recomended.
I used kingston KVR533D2N4K2/2G with good luck on 4 motherboards.

You can try it, but watch for crashes and stabilty issues, if it has issues, remove it.