Memory bandwidth tests... differences (PC5300 vs. PC8888)

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skier
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Re: Memory bandwidth tests... differences (PC5300 vs. PC8888

Postby skier » Fri Jun 10, 2011 9:52 am

sbohdan wrote:With the new Sandybridge platform all of the above is untrue. Here the higher the rated speed - the higher is the bandwidth. Even the timing has not much significance anymore. With 2133 memory I get 28GB/s in sandra, while 1600mhz would give me about 20-21GB/s, 1333 about 17GB/s. So you need to mark all of the above being related to core and earlier platforms.


are you saying that bandwidth does or doesnt scale with frequency now?
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Re: Memory bandwidth tests... differences (PC5300 vs. PC8888

Postby sbohdan » Sat Nov 26, 2011 9:53 pm

Here the higher the rated speed - the higher is the bandwidth.


I just said it above :)

Since the memory controller is on die, there is no northbridge to limit the FSB, so with Sandybridge and above, the faster the RAM is the higher the bandwith. Timing is not important - frequency is.

edit: just noticed this is an old question O:)
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