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Apakah Memori Menjadi Lebih Lambat jika Ukurannya Meningkat?

Apakah Memori Menjadi Lebih Lambat jika Ukurannya Meningkat?

Geoffrey Carr

Kadang-kadang sangat menyenangkan untuk berspekulasi bagaimana perbedaan sistem Anda akan beroperasi jika ada perubahan pada komponen perangkat keras. Artikel SuperUser T & A hari ini membahas peningkatan ukuran memori untuk membantu memuaskan keingintahuan pembaca.

Sesi Tanya & Jawab Hari ini hadir untuk memberi kami SuperUser — subdivisi Stack Exchange, pengelompokan situs web Q & A berbasis komunitas.

Foto milik Asosiasi WDA (Flickr).

Pertanyaan

Pembaca SuperUser spartacus ingin tahu apakah meningkatkan ukuran memori akan menyebabkannya menjadi lebih lambat:

If we increased the size of SDRAM using the same technology, would the response time become slower? If it did become slower, would it be due to the complexity of digital logic?

Apakah peningkatan ukuran menyebabkan memori menjadi lebih lambat?

Jawabannya

Kontributor Superuser, Daniel R Hicks dan Shikhar Bhardwaj memiliki jawabannya untuk kami. Pertama, Daniel R Hicks:

Yes and no. As duDE states, memory will never run faster than the bus/clock speed driving it, but the maximum speed of memory is definitely dependent on size.

As a memory assembly gets larger, the number of levels of address decoder increase (with the log of size), and the load on the drivers increases linearly (producing roughly a logarithmic increase in delay).

So, while it is rarely worthwhile to limit the size of RAM in a off-the-shelf system in an attempt to increase speed (there are exceptions where the box adjusts clock speed based on the size of RAM), if you are a system designer, the maximum RAM size is one of the performance trade-offs you must consider.

Dilanjutkan dengan jawaban dari Shikhar Bhardwaj:

No, it does not. As SDRAM is synchronized with the system, memory speed depends on the speed of the system. What may affect the speed of memory access is the configuration it is used in.

If your build already has a dual-channel (or triple-channel) configuration, and the increased memory does not use identical modules, then you may slow down to single-channel operation. However, this decrease is hardly noticeable, as Wikipedia says:

  • Tom’s Hardware found little significant difference between single-channel and dual-channel configurations in synthetic and gaming benchmarks (using a “modern (2007)” system setup). In its tests, dual-channel gave at best a 5 percent speed increase in memory-intensive tasks.

In this case, the speed may decrease, but you will experience an overall boost in performance due to the greater amount of physical memory available to your operating system. This, of course, depends on the operating system you are using and how efficient it is at utilizing the available resources.


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