Question

question 51 of 57
what are the advantages of sram over dram, assuming the same operating frequency? (select two)
sram accesses sixteen consecutive 64 - bit words per bus clock cycle
sram uses less power than dram
sram includes a buffer between the data bus and the memory
sram accesses four consecutive 64 - bit words per bus clock cycle
sram doubles the data transfer rate of dram

Explanation:

Step1: Recall DDR3 and DDR4 features

DDR4 can access more data per bus - clock cycle compared to DDR3. Also, DDR4 is more power - efficient.

Step2: Analyze each option

• Option 1: DDR4 accesses more than one word per bus - clock cycle compared to DDR3, not just two consecutive words per bus - clock cycle in a special sense compared to DDR3's capabilities, so this is not a key advantage.
• Option 2: DDR4 uses less power than DDR3, which is a significant advantage.
• Option 3: Both DDR3 and DDR4 may have buffers between the data bus and memory, so this is not a differentiating advantage of DDR4 over DDR3.
• Option 4: DDR4 accesses more than one word per bus - clock cycle, which is an advantage.
• Option 5: There is no such relation that DDR4 doubles the data transfer rate of DDR3 in a simple multiplicative sense without considering other factors like bus width etc.

Answer:

B. DDR4 uses less power than DDR3
D. DDR4 accesses more than one word per bus clock cycle