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

Re: W520 so slow on battery

[ Edited ]

harrisb wrote: I ran the performance tests with PCMARK7 and got a score of 3987 on AC and 2756 on Battery.

2756 on battery with the current BIOS is quite good. What is your configuration? (I bet you have an SSD.)

(You may want to put your configuration in your signature.)

_______________________________________________________________________
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
Guru
harrisb
Posts: 1,028
Registered: ‎04-20-2008
Location: Cary, NC
0

Re: W520 so slow on battery


huberth wrote:

harrisb wrote: I ran the performance tests with PCMARK7 and got a score of 3987 on AC and 2756 on Battery.

2756 on battery with the current BIOS is quite good. What is your configuration? (I bet you have an SSD.)

(You may want to put your configuration in your signature.)


Yes, there is an Intel 310 mSata 80GB SSD installed.

W520, i7-2820QM, BIOS 1.42, 1920x1080 FHD, 32 GB RAM, 2000M NVIDIA GPU, Samsung 840 Pro 480GB SSD, Hitachi 1TB 7200rpm HDD, WD 2TB USB 3.0, eSata Plextor PX-LB950UE BluRay

W520, i7-2760QM, BIOS 1.42 1920x1080 FHD, 32 GB RAM, 1000M NVIDIA GPU, Crucial M500 480GB mSata SSD, Hitachi 500GB HDD, WD 2TB USB 3.0
Token Ring
shan_mcarthur
Posts: 99
Registered: ‎10-13-2010
Location: Regina, SK Canada
0

Re: W520 so slow on battery

I will NOT install power managment driver on my machine because it regularly blue screens the machine.  That said, CPU-z shows my machine frequently capped at 800MHz - 998 MHz.

Paper Tape
jeanmah
Posts: 5
Registered: ‎10-13-2011
Location: Montreal
0

Re: W520 so slow on battery

Dear Lenovo,

I think this situation is not acceptable.

I my case, when I moved the bios to max performance for Battery, the laptop starting giving me the low speed of the battery even when connected to the AC!

I think Lenovo should work very hard to release a patch.

The problem is very simple, no need to check any software. Just run on Battery and you get a terrible performance.

Guru
ColonelONeill
Posts: 6,641
Registered: ‎12-26-2009
Location: Toronto
0

Re: W520 so slow on battery

They do have a version in testing that allows full CPU and turbo on battery. Sit tight.

I personally force the CPU to 800MHz on battery anyway. Gets me more battery life, and doesn't strain the battery cells.
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
Bit Torrent
ThorsHammer
Posts: 2,400
Registered: ‎04-08-2011
Location: USA
0

Re: W520 so slow on battery

Supposedly this is now corrected in BIOS v1.32.  See http://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/BIOS-1-32-released-for-W520-post-feedback-here...

 

I have not implemented that BIOS, yet.

Guru
ColonelONeill
Posts: 6,641
Registered: ‎12-26-2009
Location: Toronto
0

Re: W520 so slow on battery

Turbo works on battery but I haven't tried the battery cold boot.

Still going to lock my CPU to 800MHz.
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
Fanfold Paper
lenovouser2011
Posts: 23
Registered: ‎10-17-2011
Location: München
0

W520, Performance on battery

[ Edited ]

Hi,

 

I´ve got the same problem like everyone here with bad performance on battery. Also several other things.

 

Now I tried to give back the notebook to my dealer, but he told me that Lenovo said, that this is a function and no failure.

 

That´s the reason, why I can´t get back my money.

 

I´m really disappointed because I need this laptop for business and edu.

 

I´m waiting now 3 weeks for a positive answer (because I must use the laptop with performace also with no batteries and that´s the reason why is not usable for me), although I have nex day garantee...

 

Can someone from Lenovo inform me if it the normal procedure letting their customers stay in the rain?

Guru
harrisb
Posts: 1,028
Registered: ‎04-20-2008
Location: Cary, NC
0

Re: W520, Performance on battery

[ Edited ]

Please apply BIOS 1.32. This fixes TurboBoost when cold booting on battery. You must keep the battery in the system when on AC if you want to use TurboBoost as well. Hope this helps.

 

readme: http://download.lenovo.com/ibmdl/pub...s/8buj10us.txt
windows EXE: http://download.lenovo.com/ibmdl/pub...s/8buj10us.exe
bootable ISO: http://download.lenovo.com/ibmdl/pub...s/8buj10uc.iso

W520, i7-2820QM, BIOS 1.42, 1920x1080 FHD, 32 GB RAM, 2000M NVIDIA GPU, Samsung 840 Pro 480GB SSD, Hitachi 1TB 7200rpm HDD, WD 2TB USB 3.0, eSata Plextor PX-LB950UE BluRay

W520, i7-2760QM, BIOS 1.42 1920x1080 FHD, 32 GB RAM, 1000M NVIDIA GPU, Crucial M500 480GB mSata SSD, Hitachi 500GB HDD, WD 2TB USB 3.0
Fanfold Paper
wanted00
Posts: 15
Registered: ‎10-17-2011
Location: DE
0

Re: W520, Performance on battery

Where did you get that link/BIOS from? I am using the BIOS Version 1.27 and when I check for updates with the ThinkVantage Toolbox, it doesn't find any new versions of the BIOS. When I check the update section on the Lenovo website, it only offers me to download the BIOS Update Utility V1.30?