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Apple Computing Products:
macOS - Desktop Hardware
New iMac - Memory speed
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<blockquote data-quote="bobtomay" data-source="post: 460662" data-attributes="member: 24160"><p>technologist is correct (still have to spread it around tech)</p><p> </p><p>according to Apple's tech specs, the bus speed is 800Mhz only between the CPU and the northbridge, the bus speed between the northbridge and the memory is 667Mhz.</p><p></p><p>Putting a memory chip with a speed higher than the bus speed in a machine with EFI and basically no tweaking capability on the motherboard to overclock (at least not easily) is wasted money. You will see no performance gain with them based on the clock speed. If you can find some 800 with lower latency than any 667 (unlikely) you may see a very small performance gain, but would not likely be enough to notice without running speed tests between the two of them.</p><p></p><p>edit: have to say I do not know enough about EFI boards to even know how or even if these boards make adjustments between different latency memory.</p></blockquote><p></p>
[QUOTE="bobtomay, post: 460662, member: 24160"] technologist is correct (still have to spread it around tech) according to Apple's tech specs, the bus speed is 800Mhz only between the CPU and the northbridge, the bus speed between the northbridge and the memory is 667Mhz. Putting a memory chip with a speed higher than the bus speed in a machine with EFI and basically no tweaking capability on the motherboard to overclock (at least not easily) is wasted money. You will see no performance gain with them based on the clock speed. If you can find some 800 with lower latency than any 667 (unlikely) you may see a very small performance gain, but would not likely be enough to notice without running speed tests between the two of them. edit: have to say I do not know enough about EFI boards to even know how or even if these boards make adjustments between different latency memory. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
New iMac - Memory speed
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