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w520user999
Posts: 54
Registered: ‎07-27-2011
Location: Canada
0

Re: New W520 BIOS 1.37 has been posted:


harrisb wrote:

Perhaps the memory clock limit was to address a possible cause of the SSS issue. I've been running 1.37 with Crucial 4x8 gb SODIMMs w/o any issue. They are capable of running at 761MHz but are being clocked at 664.6 Mhz. Not a big deal for me.

 

 



Perhaps harrisb.  Thats an excellent bit of speculation but I assume we will never know the answer given Lenovo's track record of keeping us informed of the progress (or not) on this issue.

 

OR perhaps its removing a feature (PnP RAM) without prior notice or documentation.

 

 

 

W520: UNSUPPORTED SYSTEM
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w520user999
Posts: 54
Registered: ‎07-27-2011
Location: Canada
0

Re: New W520 BIOS 1.37 has been posted:

memoryspec

W520: UNSUPPORTED SYSTEM
Punch Card
Ldxrunner2015
Posts: 56
Registered: ‎03-10-2010
Location: United States
0

Re: New W520 BIOS 1.37 has been posted:

Greetings to all, Referencing the BIOS 1.37, is this for all W520 Thinkpad laptops ? Thank you. 

802.11n
huberth
Posts: 539
Registered: ‎07-08-2009
Location: USA
0

Re: New W520 BIOS 1.37 has been posted:


Ldxrunner2015 wrote:

Greetings to all, Referencing the BIOS 1.37, is this for all W520 Thinkpad laptops ? Thank you. 


Yes, the BIOS 1.37 is for all W520 Thinkpad laptops.

_______________________________________________________________________
W520 4270CTO i7-2820QM Quadro2000M 1920x1080 Display 16GB RAM 2x240GB Intel 510 SSDs (RAID 0) - BIOS 1.42 - PCMark7:4,568
Samsung Series 9 15-inch NP900X4C-A03US - PCMark7: 4674
Bit Torrent
ThorsHammer
Posts: 2,400
Registered: ‎04-08-2011
Location: USA
0

Re: New W520 BIOS 1.37 has been posted:


huberth wrote:

Ldxrunner2015 wrote:

Greetings to all, Referencing the BIOS 1.37, is this for all W520 Thinkpad laptops ? Thank you. 


Yes, the BIOS 1.37 is for all W520 Thinkpad laptops.


All W520 ThinkPads still under warranty.  If your warranty has expired, you risk bricking the machine on a BIOS upgrade so do so at your own peril.

Lenovo Staff
someotherguy
Posts: 2,318
Registered: ‎10-29-2009
Location: NC
0

Re: New W520 BIOS 1.37 has been posted:

[ Edited ]

Here are the answers to questions raised in this thread:

 

Why does W520 BIOS 1.37 limit memory frequency to 1333MHz?  The W520 never shipped from Lenovo with anything other than 1333 MHz memory.  It was planned, designed, and tested with 1333MHz from day one.  The only supported memory options are PC3-10600 which is 1333MHz.  W520 has never been tested with memory running at 1600MHz, and Lenovo does not support W520 in that configuration.  However due to supplier logistics, it is possible that W520 systems built this summer (during the last few weeks of production) may contain 1600MHz DIMMs.  Because of this, and to maintain the design point of W520 (which is 1333MHz), this BIOS change is necessary.  Otherwise, Lenovo would be shipping W520 systems in an untested and unsupported configuration.

 

Why is this change not documented in the release notes?  Because the W520 never shipped with anything other than 1333 MHz memory, and because it does not support anything other than 1333 MHz memory, it is not necessary to publicly document something changing that only affects an unshipped and unsupported configuration.

 

Admin Edit 6/24/12

 

I am marking this as the accepted solution to guide readers to this point that Lenovo has researched and replied to the issue explaining the official support for 1333 mhz memory at the system level and rationale for why a BIOS was introduced to set this limit to ensure that late model system builds that could include 1600mhz memory matched the original spec and operated at 1333 to avoid test and certification considerations. We are noting customer feedback that changes to functionality delivered through BIOS should be communicated in the BIOS change log.  We will share these concerns with our engineering team.  

Bit Torrent
ThorsHammer
Posts: 2,400
Registered: ‎04-08-2011
Location: USA

Re: New W520 BIOS 1.37 has been posted:

[ Edited ]

someotherguy wrote:

Here are the answers to questions raised in this thread:

 

Why does W520 BIOS 1.37 limit memory frequency to 1333MHz?  The W520 never shipped from Lenovo with anything other than 1333 MHz memory.  It was planned, designed, and tested with 1333MHz from day one.  The only supported memory options are PC3-10600 which is 1333MHz.  W520 has never been tested with memory running at 1600MHz, and Lenovo does not support W520 in that configuration.  However due to supplier logistics, it is possible that W520 systems built this summer (during the last few weeks of production) may contain 1600MHz DIMMs.  Because of this, and to maintain the design point of W520 (which is 1333MHz), this BIOS change is necessary.  Otherwise, Lenovo would be shipping W520 systems in an untested and unsupported configuration.

 

Why is this change not documented in the release notes?  Because the W520 never shipped with anything other than 1333 MHz memory, and because it does not support anything other than 1333 MHz memory, it is not necessary to publicly document something changing that only affects an unshipped and unsupported configuration.


The Lenovo documentation disagrees with you.  See http://www.lenovo.com/psref/pdf/tabook.pdf. 

 

NiceTry.JPG

 

Considering this documentation has stated otherwise for months and months, it would appear your claim is at best suspect. 

 

Wow.

 

Guru
ColonelONeill
Posts: 6,377
Registered: ‎12-26-2009
Location: Toronto

Re: New W520 BIOS 1.37 has been posted:

[ Edited ]

Moderate my dissent if you will, but that statement is really FUBAR.

This BIOS broke something that was working, and that's not right. It was advertised thusly as ThorsHammer posted.

Were there actual reports of issues with 1600MHz ram? If I recall correctly, the BIOS team made efforts to make 1866MHz work.

 

Further gripes: This BIOS, or Power Manager's update really did a number on my side. My battery was rated at ~100Wh before the BIOS update. Updating brought it down to 93.24Wh, which is as written on the battery, so I'm fine with this. But it decreased my full charge capacity by 10Wh as well, for no apparent reason, down to 88.59Wh. Why, I don't know. Running a battery reset now to see if it's fixable.

Either Power Manager/this BIOS failed, or the battery has always been defective. Lose-lose; frustrating for me and other end-users, as well as Lenovo for defective work.

W520: i7-2720QM, Q2000M at 1090/695/1390, 22GB RAM, 500GB HDD, FHD screen
TPT1: 1839-23U, stock ICS
X61T: L7500, 3GB RAM, 500GB HDD, XGA screen, Ultrabase
Lenovo Staff
someotherguy
Posts: 2,318
Registered: ‎10-29-2009
Location: NC
0

Re: New W520 BIOS 1.37 has been posted:


ThorsHammer wrote:

The Lenovo documentation disagrees with you.  See http://www.lenovo.com/psref/pdf/tabook.pdf. 

 

 

 


Not at all.  Look down a little more from where you stopped reading to make your wrong point.  Supported memory options are only PC3-10600.

Are you really a system/IT admin?  Do you really put unsupported memory into your users systems?

 

Wow.

Lenovo Staff
someotherguy
Posts: 2,318
Registered: ‎10-29-2009
Location: NC

Re: New W520 BIOS 1.37 has been posted:

[ Edited ]

 

I'm not interested in moderating anything.  I'm telling you what the situation is.  You can decide whether to accept it or not, but it does not change the situation.  I realize Intel spec allows for 1600MHz FSB on quad-core sandy bridge, but this has nothing to do with what memory has been tested/qualified/shipped in W520 for almost 1 year.  W520 has never been advertised with anything other than 1333MHz memory, and the memory FRUs for W520 are all 1333MHz.

 

I don't know if there are actual issues with 1600MHz or not, because it is not a supported configuration.  Nobody within Lenovo has ever tested it.  This includes testing for thermal, power consumption, EMI, etc.  None of that has been done for 1600MHz.