Question about matching memory with cpu

[pfm]

Hi,
this is about a T5870 mobile cpu. FSB is 800Mhz (200x4).
This laptop came with PC3-8500 installed. Wouldn't a PC3-12800 be a better match with this cpu/fsb ?
Please advise.
Thanks.
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[ShintaiDK]

1066Mhz is the highest a series 4 chipset supports. When memory controller was still chipset side.

 

[Blain]

Match what Crucial recommends and forget about it.

 

[ch33zw1z]

Since it's a laptop, go with what's recommended.

 

[pfm]

actually now that I check the specs the fastest memmory it will take is a PC3-10600 so anything higher is not even possible. Which begs the question - whats the point of the motherboard being able to run 800Mhz and 1066Mhz FSB processors ? Wouldn't the memory always be the bottleneck (theoritically atleast) ??
Its a Lenovo SL410 btw.
http://support.lenovo.com/en_US/detail.page?LegacyDocID=MIGR-73415

 

[ShintaiDK]

actually now that I check the specs the fastest memmory it will take is a PC3-10600 so anything higher is not even possible. Which begs the question - whats the point of the motherboard being able to run 800Mhz and 1066Mhz FSB processors ? Wouldn't the memory always be the bottleneck (theoritically atleast) ??
Its a Lenovo SL410 btw.
http://support.lenovo.com/en_US/detail.page?LegacyDocID=MIGR-73415

The memory is dualchannel. So essentially the FSB is the bottleneck. But it doesnt woork that way either due to latencies, other devices accessing memory etc.

 

[Emulex]

Latency and interleaving would give you a little oomph but honestly we're talking 1-10% max. The biggest gain from optimal memory is when you have integrated video that steals from cpu's ram. Back in the early days you could actually get VGA distortion with poor quality ram. Throw in a match pair of low latency and the jitters would go away. Quite amusing.