21837022
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Flashcards by Jessica Rizo, updated more than 1 year ago
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| Question | Answer |
| List RAM DIMMs | 184 pin DDR 240 pin DDR2 240 pin DDR3 288 pin DDR4 |
| List RAM SODIMMs | 200 pin DDR 200 pin DDR2 204 pin DDR3 260 pin DDR4 |
| What are DIMMs? | dual in-line memory module containing one or several RAM chips that connect to an expansion bus on the motherboard. |
| What are SODIMMs? | small outline dual-in memory module. Smaller than DIMMs Commonly found on smaller technologies |
| What is DRAM? | Dynamic Random Access Memory Found on DIMM’s Legacy tech that would need to be constantly refreshed |
| What is SDRAM? | Synchronous DRAM Type of DRAM (found on today’s tech) Queue’s to FSB clock |
| What is multichannel memory? | Having multiple memory modules installed on an expansion bus. |
| How many types of multichannel memory that exist? | Dual channel, triple channel, and quad channel |
| How much voltage does DDR2 use? | 1.8v |
| How much voltage does DDR3 use? | 1.5v |
| How much voltage does DDR4 use? | 1.2v |
| What is the formula to calculate the throughput of SDRAM ? | Speed rate x 100mhz = FSB clock cycle FSB clock cycle x 8bytes per operation= throughput |
| When looking at the packaging of SDRAM, what does the value at the end refer to ( i.e. DDR2-400)? | The value refers t how many chips the memory module has |
| When using multichannel memory modules, what do they need to be? | They need to be identical to be fully functional |
| What happens when you have a multi-channel memory module that has chips on both sides? | The computer will see it as acting as filling 2 spots. So if you have quad-channel memory and you have a memory module that has chips on both sides it virtually using 2 spots when installed even if it is physically installed in one spot. |
| What is parity memory? | Parity adds one bit of data at the end of a piece of information to just make sure that when it gets delivered the value is the same as predicted when it arrives at its destination. |
| What happens when the parity bit is not the same? | The whole piece is throw out and must be resent. |
| What is ECC? | Error Correcting Code Like parity it sends a bit of data that checks if the info is correct but can also detect an error as well as correct it. |
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