Sandy Bridge: Setting Intel’s Modern Foundation

Re:Sandy Bridge: Setting Intel’s Modern Foundation by vel0city on Monday August 07, 2023 @11:26PM (#37044159)

I'm seeing a lot of specs for that chip listing 64Gbit/s and some showing GB/s. I'd love to see some confirmation of actual performance.

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Re:Sandy Bridge: Setting Intel’s Modern Foundation by kcb on Tuesday August 08, 2023 @12:21AM (#37044472)

Depending on clock speed of memory. For LPDDR5-6400 which is pretty common.

3200000000(clock) x 2(DDR) x 2(16-bit channel width) x 4(channels) = 51200000000 bytes/sec or 51.2 GBytes/sec

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Re:Sandy Bridge: Setting Intel’s Modern Foundation by vel0city on Tuesday August 08, 2023 @01:23AM (#37044834)

16 bits is where you added data width here, so that would be 52 gigabits a second, no? To go to bytes wouldn't we need to divide by 8?

And I imagine this commenter talking about 8GB RAM, they're assuming not all 4 channels are populated. So one could imagine two channels being populated, 25.6 Gbit/sec, divide by 8 to get bytes, that's then only 3.2GB/s?

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Re:Sandy Bridge: Setting Intel’s Modern Foundation by kcb on Tuesday August 08, 2023 @04:15AM (#37045999)

I multiplied by 2 instead of 16. That's what makes it bytes.

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Re:Sandy Bridge: Setting Intel’s Modern Foundation by vel0city on Tuesday August 08, 2023 @08:35AM (#37048059)

Ah ok I see what you did there, thanks for the explanation.

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