I'm planning to rebuild an old system unit which has an AMD Athlon 64 X2 4000+ processor and an EMAXX EMX-AMD690HD motherboard. The motherboard has 4 RAM slots. Is the processor compatible with 16GB of RAM? I'm planning to buy 4 sticks of 4GB RAM.
That is a antique Motherboard that isn't made anymore.
Did find Emaxx Support for you if you want to make contact with them. The Emaxx site doesn't even have a Manual for your Motherboard: https://www.emaxxtech.com/manual/
Here is the Emaxx Support Contact link: https://www.emaxxtech.com/contact-us/
This one store in the Phillipines still sells that motherboard: https://www.carousell.ph/p/emaxx-emx-amd690hd-ram-ddr2-800x-4-dual-channel-277186003/
Chipset: ATI RS690+SB600, 2.0GTs Ob-board Video: RAdeon X1250 32MB up to 256MB Shared Video Memory RAM: DDR2 800X 4(Dual-Channel) Audio: 8-Channel HD ALC861 Connector: Ports: 24+4 Power Connector,10/100 LAN,1 pCI-E 16X Slot,2PCI Slot,8 USB 2.0 Ports, 4SATAII (Raid Capable) Micro ATX
Their site never mentioned capacity:
At the time, anything larger than 2GB per DIMM was pretty much unheard of, so I doubt they even tested any 4GB DIMMs.
Might work, might not. I don't think you'll get a definitive answer without just trying it.
I actually found a 4gb DDR2 PC2-6400 800mhz RAM stick for sale online. My next question is, the original RAM installed is a 2gb DDR2 PC2-5300 667mhz. Will a DDR2 PC2-6400 800mhz work or should I just stick to a DDR2 PC2-5300 667mhz?
Try 8GB (4x2GB) Crucial B Sport DDR2 Memory 800MHz CL5 PC2-6400 BL25664AA80E, it should work.
The following worked on my system, a ASROCK-N68C-S UCC with a AMD Phenom x8,
Crucial produce quality RAM and always have.