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ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
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2445 Posts

03-09-2012

Canada

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  • Posts: 2445
  • Registered: ‎03-09-2012
  • Location: Canada
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  • Message 11 of 13

Re: Different Window 7 WEI scores for Ram speed and configuration

2012-08-16, 12:38 PM
You need two modules timed the same to run dual channel & one dimm cannot run that way.

Use the Windows 7 diagnostics accessible from Adminstrative tools in a working system of from the boot menu when booting a Win 7 DVD. That is an older mem test tool and not as thorough. The memory is marginal and likely not compatible with the system rather than defective.
T520 Model 4239 Intel(R) Core(TM) i7-2860QMbr>; Nvidia NVS 4200M Win 10 64bit
Z70-80 I7 - 5500U 16GB GB - 1TB HD Win 10 64bit FHD 17.3", G840 w/2GB

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315 Posts

02-21-2008

Singapore

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  • Posts: 315
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  • Location: Singapore
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  • Message 12 of 13

Motherboard MHz and Ram CL values

2012-08-16, 12:43 PM

Just for info,

 

Because of the speed of the motherboard and the stable speed of the SODIMM, some laptops will 'feel' the same.

 

For example, a T420s motherboard speed of FSB 1333MHz using memory of CL10 would be around the SAME speed with a T430s motherboard speed of FSB 1600Mhz using memory of CL11. This information you can google.

 

The reason why the 'newer' memory of 1600MHz running at CL11 is because faster speed means more demanding requirement on the quality of the memory chip. Hence it is quite difficult to manufacture CL10 SODIMM (at this moment). The fastest I could locate as of this writing was the Vengence series from Cosair (8GB modules at CL10 and 4GB modules at CL9) while the Komputerbay modules I bought was 8GB CL10.

 

Hence you can probably get away with installation 1333MHz CL9 SODIMM on your T430s and get the same speed with the 1600Mhz CL11 modules you find on the market now.

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315 Posts

02-21-2008

Singapore

577 Signins

3826 Page Views

  • Posts: 315
  • Registered: ‎02-21-2008
  • Location: Singapore
  • Views: 3826
  • Message 13 of 13

Re: Motherboard MHz and Ram CL values

2012-08-18, 15:47 PM

I did some more testing and quite interesting.

 

When T430s boot up, press Enter and I select the hardware diagnostic (F10) and memory test. The 8GB sticks passed the "advanced" test from lenovo when I used 1st stick, 2nd stick and both sticks together. But when using the Lenovo Solution Center, the 2nd stick (the presumed faulty ones) failed the 'advanced' test. This means that lenovo have different 'advanced' test routines lol.

 

I tried a software named Aida64 and ran a benchmark on the memory speed. The speed of single piece of SODIMM is much lower at 10769MB/s, vs dual channel configuration (will update later, forgot to take screenshot). The latency remained the same at 55.4 ns for both single/dual channel.

 

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