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PC-5300 vs PC-6400 memory

X60/X61 and X60t/X61t Series
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rokahn
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PC-5300 vs PC-6400 memory

#1 Post by rokahn » Tue Nov 13, 2007 3:41 am

Lenovo recommends slower PC-5300 memory. Is the x61s capable of running at the higher rate of PC-6400 memory?

Lenovo spec:
Supports two 200pin PC2-5300 Non-Parity (NP) Double Data Rate Two (DDR2) Technology
Crucial.com notes y
our system will operate at the speed of the slowest module or system component (the "lowest common denominator" effect).
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ryengineer
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Re: PC-5300 vs PC-6400 memory

#2 Post by ryengineer » Tue Nov 13, 2007 10:18 am

X61s cannot utilize the higher speed of PC2-6400 (800 MHz), it will run at 5300 (667 Mhz) memory speed.
"I've come a long, long way," she said, "and I will go as far,
With the man who takes me from my horse, and leads me to a bar."
The man who took her off her steed, and stood her to a beer,
Were a bleary-eyed Surveyor and a DRUNKEN ENGINEER.
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Munich
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Re: PC-5300 vs PC-6400 memory

#3 Post by Munich » Tue Nov 27, 2007 6:35 pm

ryengineer wrote:X61s cannot utilize the higher speed of PC2-6400 (800 MHz), it will run at 5300 (667 Mhz) memory speed.
Noob question: If the backplane of the X61t is 800 Mhz as stated on the Lenovo site, can it now be able to use the PC2-6400 memory?
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ryengineer
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Re: PC-5300 vs PC-6400 memory

#4 Post by ryengineer » Tue Nov 27, 2007 8:08 pm

Munich wrote:Noob question: If the backplane of the X61t is 800 Mhz as stated on the Lenovo site, can it now be able to use the PC2-6400 memory?
Thinkpad X61 tablet PC is able to use PC2-6400 memory but it won't run at the highest possible speed of the motherboard.
"I've come a long, long way," she said, "and I will go as far,
With the man who takes me from my horse, and leads me to a bar."
The man who took her off her steed, and stood her to a beer,
Were a bleary-eyed Surveyor and a DRUNKEN ENGINEER.
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apbudha
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Re: PC-5300 vs PC-6400 memory

#5 Post by apbudha » Wed Nov 28, 2007 7:22 pm

ryengineer wrote:
Thinkpad X61 tablet PC is able to use PC2-6400 memory but it won't run at the highest possible speed of the motherboard.
why?
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Munich
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Re: PC-5300 vs PC-6400 memory

#6 Post by Munich » Wed Nov 28, 2007 7:27 pm

apbudha wrote:
ryengineer wrote:
Thinkpad X61 tablet PC is able to use PC2-6400 memory but it won't run at the highest possible speed of the motherboard.
why?
Yeah, the unresting minds are asking "Why?" :P
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ryengineer
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#7 Post by ryengineer » Wed Nov 28, 2007 8:35 pm

PC2-5300 or PC2-6400?

Memory for T61?

DDR2 800 MHz (PC2 6400) SO-DIMM

PC2-6400 800MHz usable on Santa Rosa thinkpads?
"I've come a long, long way," she said, "and I will go as far,
With the man who takes me from my horse, and leads me to a bar."
The man who took her off her steed, and stood her to a beer,
Were a bleary-eyed Surveyor and a DRUNKEN ENGINEER.
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apbudha
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Joined: Thu Sep 07, 2006 8:51 pm
Location: Buffalo, NY

#8 Post by apbudha » Wed Nov 28, 2007 9:50 pm


thank you. I think this passage explains it best:
"Even though the Santa Rosa FSB is 800MHZ, the memory controller is set to only run at 533MHZ or 667MHZ."
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