This guide has been developed over the last few months and with notable help from MAXIMUM PC's November 2006 edition to discover which is better, High Bandwidth or Low Latency.
This determines the amount of data that is theoretically transferred from the memory to the rest of the system. The higher the clock speed, the greater the bandwidth. As opposed to low latency memory that will run on nearly any system without running out of spec, this memory type is created to for high speeds which may require you to over clock your CPU to reach the memory's clock speed.
As for numbers, the higher the number the better. For example if your ram is rated at 400mhz PC3200, you wouldn't be able to over clock your system as much as if you had 500mhz PC4000.
This describes the time it takes the memory to respond to requests. Faster responses require a lower latency. Low latency ram comes at a high cost as it requires higher quality memory.
As for clock speed numbers, lower is better. For example if your ram states the numbers 2 2 2 5, that is much better than 3 4 4 8.
Both clock speed and latency affect performance, but which is the right one for you? Which one matters the most?
For DDR ram, the tests performed showed an almost tie for bragging rights when using Low Latency or High Bandwidth memory. For DDR2 ram, there is a definite performance bonus using either ram versus standard DDR2 ram. Both have similar performance boosts though. The preference and practical choice goes to LOW LATENCY memory, as you don't have to over clock this RAM to see the benefits right away, and it has the ability to double as a higher clocked memory through relaxed timings.
Which is better? High Bandwidth OR Low Latency
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May 23, 2007
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