memory Different memory?

[C130113146]

So I currently attend a high school dedicated to Information Technology and my freshman year, (in sophomore now), we took the IC3 GS4 Computing Fundamentals test and I had to answer questions about types of memory. Problem is, I only remembered the types of memory from the practice tests and I never knew the differences.

 

So what's the difference between DRAM, SRAM, DRDRAM, PROM, EPROM, EEPROM, and if there are others I'm most likely missing feel free to tell me about them.

 

I also saw on a server listing on OldEgg that there was UDIMM memory? I mean yeah I can ask google but why do that when I can get a direct answer here.

[Anghammarad]

5 minutes ago, C130113146 said:

So I currently attend a high school dedicated to Information Technology and my freshman year, (in sophomore now), we took the IC3 GS4 Computing Fundamentals test and I had to answer questions about types of memory. Problem is, I only remembered the types of memory from the practice tests and I never knew the differences.

 

So what's the difference between DRAM, SRAM, DRDRAM, PROM, EPROM, EEPROM, and if there are others I'm most likely missing feel free to tell me about them.

 

I also saw on a server listing on OldEgg that there was UDIMM memory? I mean yeah I can ask google but why do that when I can get a direct answer here.

Because Google may be the quicker way than wait here for answers to all this =) 

 

Now a quick information roundup about the things up there... 

 

all those "xxxRAM" is computer ram. the specs from the different types Zip, Dil, Dimm, PS2 Edo, SDRam, DDR 1-5, unregistered ram (the U) or registererd ram, ECC, non ECC, SO DIMM... all volatile memory in short RAM for computers or servers. And all different connectors. The capacity and bandwith did grow with each generation, as well as the speed. The old Zip or DIL rams even hat feet and needed to be socketed. Even older ram is ring memory... but this I won't explain here now =) 

 

Eprom are like unchangable bios chips... you could write to them once and read from them many times... there is special equip you could get for your computer to program those yourself. EEPROM were the same but rewriteable... 

 

This only a quick glance... I have some knowledge but can't recite all the specs of the specific standarts. There Google may help you =) or Wiki.

[BluJay614]

20 minutes ago, C130113146 said:

So I currently attend a high school dedicated to Information Technology and my freshman year, (in sophomore now), we took the IC3 GS4 Computing Fundamentals test and I had to answer questions about types of memory. Problem is, I only remembered the types of memory from the practice tests and I never knew the differences.

 

So what's the difference between DRAM, SRAM, DRDRAM, PROM, EPROM, EEPROM, and if there are others I'm most likely missing feel free to tell me about them.

 

I also saw on a server listing on OldEgg that there was UDIMM memory? I mean yeah I can ask google but why do that when I can get a direct answer here.

Mildly embarrassed that I almost mistook that for UniDIMM. I took the IC3 GS5 tests back at the end of October.

 

SRAM(Static RAM)

• Stores data using four transistors for every bit of data.
• Does not require constant power to maintain the contents of memory
• more complex and less dense (resulting in lower storage capacity) then DRAM
• faster and requires less power then DRAM
• Regular SRAM still requires periodic power to maintain the state of memory, but the refresh is less then with DRAM.
  • Non-Volitile (nvSRAM) is able to maintain memory contents when the power is turned off.
• Typically used in cache memory, such as CPU cache, hard disk cache, and cache in networking devices.

DRAM(Dynamic RAM)

• stores data using a single transistor for every bit of data (a 0 or a 1)
• to maintain the state of the transistor, DRAM must continually supply power to the transistor; when the power is turned off, the data is lost.
• simple to implement
• can have very high density (resulting in high storage capacity)
• because of the simplicity, DRAM is relatively inexpensive
• used in the main system memory on a computer

I don't recall the others off the top of my head to be honest XP.

However, I can tell you this:

UniDIMM (Universal DIMM) is a specification for DIMMs and is designed to carry DRAM chips. UniDIMMs can be populated with either DDR3 or DDR4 chips, but do not support any additional memory control logic. Because of this, the computer's memory controller must support both DDR3 and DDR4 memory standards. UniDIMM is an upgrade to the SODIMM standard and allows mobile platform users to use both DDR3 and DDR4.