Link to home
Start Free TrialLog in
Avatar of Grippit
Grippit

asked on

Interface for using SSD as a DDR DIMM on the motherboard

Sorry if this is a stupid question but...

Are there any reasons why a 2.5inch SSD (Hard Drive) Cannot be used as RAM (DDR3)?

Does such an interface exist?

Would there be any OS issues with having 128GB instead of the 'typical' 4/8GB of RAM?
Avatar of rindi
rindi
Flag of Switzerland image

RAM usually sits very close to the CPU because it uses a very high bus speed and talks very directly to the CPU. Harddisks (or SSD's) use another, much slower BUS. So if you'd use SSD's as RAM you'd slow down the PC. Also RAM us addressed much more directly by a wider, parallel BUS than HD's are (SATA is serial). Also that makes a huge speed difference.

Apart from that the concept of disks and RAM is completely different. A disk keeps the data in the store when powered off, while RAM loses all that data when there is no power applied to it. That would make "resetting" the SSD after a system crash or similar very difficult. Then there is also the fact that RAM can get written to indefinitely, while SSD's have a limited write cycle, so they would last much less long than RAM.

If you want to use lots of RAM get a Server, there are many models around that take 128GB of RAM.
Avatar of Grippit
Grippit

ASKER

Would a correctly designed 'interface' not address all the issues you have described?
ASKER CERTIFIED SOLUTION
Avatar of rindi
rindi
Flag of Switzerland image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial