Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
All Forum Topics
Options

212 Posts

11-08-2010

BC, Canada

3129 Signins

7207 Page Views

  • Posts: 212
  • Registered: ‎11-08-2010
  • Location: BC, Canada
  • Views: 7207
  • Message 101 of 260

Re: T420S? can't wait for it? when?!

2011-02-10, 20:19 PM
It really would be too bad if they didn't put a quad-core Sandy Bridge processor into the T420s- it gets better battery life than the 540M they use in the current T410s under most circumstances.

I'm also going to assume you're going to get better battery life with models that only have the Intel integrated graphics than the NVS4200M. I'm not sure how much of an improvement that card is now, seeing as the Intel solution has increased in power by a substantial amount.

This is where this information comes from:
http://www.tomshardware.com/reviews/core-i7-2820qm-sandy-bridge-mobile,2838-13.html

Actually, I'm going to hazard a guess for (at least the announcement) of these models: February 20th- since that's when the dual core mobile SB processors are released.

I guess we'll see then...
Reply
Options

8 Posts

07-24-2010

Toronto

5 Signins

79 Page Views

  • Posts: 8
  • Registered: ‎07-24-2010
  • Location: Toronto
  • Views: 79
  • Message 102 of 260

Re: T420S? can't wait for it? when?!

2011-02-11, 7:12 AM

The bezel looks massive! :smileymad:

 

Reply
Options

52 Posts

01-30-2011

Germany

174 Signins

431 Page Views

  • Posts: 52
  • Registered: ‎01-30-2011
  • Location: Germany
  • Views: 431
  • Message 103 of 260

Re: T420S? can't wait for it? when?!

2011-02-11, 7:52 AM
Q-ball, you definitely have a point here, but if you look at the former series, Lenovo always made the 's models a bit weaker than their fat siblings, so i guess they do now as well. But i beg for the opposite!

Chupacabras, the bezel is in fact a bit smaller than on the predecessors. The top looks equivalent, the sides are significantly smaller and the base bezel looks like a bit thicker than the one of the T400s on my desk, but this can also be by perspective and the smaller side bezels. They definitely made the base less deep. The 1cm space between keyboard and screen is gone, the space between trackpoint buttons and trackpad has shrunken and the trackpad buttons are about 2mm closer to the edge, so i propose a 1.5cm shorter base, which is about the loss of vertical space when going from 16:10 to 16:9 *sob*.

Hecke
Reply
Options

7 Posts

09-15-2010

10 Signins

67 Page Views

  • Posts: 7
  • Registered: ‎09-15-2010
  • Location:
  • Views: 67
  • Message 104 of 260

Re: T420S? can't wait for it? when?!

2011-02-13, 0:37 AM

Battery Consumption: Comparing i5-560M to i7-2820QM

 

@ Q-Ball

 

I. Summary:

For most tasks the i7-2820M does consume less power, but due to drastic increases in power consumption for not only computationally-intensive (+55%) but also gaming (+38%) and memory-intensive applications (+28%), the i7-2820QM will consume more power on a given day then the i5-560M.

 

II. Methods:

The total power consumption for typical i5-560M, and i7-2820M equipped laptops (all have ~14” screen, integrated graphics, HDD) was compared.  Data was collected from more than one system systems and due to variances in systems the results are approximate, but the author has made the best attempt to isolate the effect of the different processor.  The relative percentage difference (RPD) in total system power consumption (CPU, HDD, power supply, wireless card, LCD, backlight, DVD, memory, graphics and other components are included)was compared between the two systems for 10 different common computer tasks types (Table 1).  Additionally the average power consumed in each of these 10 task is given (Table 2).

 

For the 10 common taks, idle, full is the system at idle with full brightness and Idle, low is for lowest screen brightness.  The CPU task power consumption was judged using CPU PCMark test and Cinebench.  The memory, HD write and HD read is the power consumed while running those repective PCMark benchmarks while at full brightness. Upload and download are just the power used while uploading and downloading a large file while at full brightness.  DVD playback used StarTrek at full brightness.  3D used a composite of 3DMark01 and Resident Evil 5.

 

 

III. Results:

Table 1: Relative percentage difference (RPD) in total system power consumption for the 10 common computer task types. Percentages given are the increase in power consumption for the i7-2820QM over the i5-560M.  (GREEN is where the 560M performs better)

 Table 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 2: Average power consumption (Watts) in each of the 10 common computer task types for the i5-560M system and i7-2820QM system. (GREEN is for less power consumption)

 

 Table 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IV. Discussion:

While the i7-2820QM does consume less power in many tasks (Idle, hard drive access, internet, and watching DVDs) these are all tasks that use relatively little power from the CPU anyway (only 4 to 17% of the total system power consumption).   The result is that even though the i7-2820QM by itself saves a lot of power compared to the older i5-560M for these tasks (as confirmed by the Tom’s Hardware article), these are all tasks that the CPU does not consume very much power for anyway.  When the system is under CPU, memory, or 3D (gaming) strain the i7-2820QM uses a dramatically higher amount of power (Table2) that would almost always make up for the gains you made in the other tasks.

 

With limited CPU, memory, and 3D intensive applications it would be possible to achieve better battery life with the i7-2820QM, but then why would you be spending $568 for an extreme performance chip to run remedial tasks that certainly do not require it. 

Reply
Options

20 Posts

01-05-2009

Cambridge, Massachusetts, USA

127 Signins

304 Page Views

  • Posts: 20
  • Registered: ‎01-05-2009
  • Location: Cambridge, Massachusetts, USA
  • Views: 304
  • Message 105 of 260

Re: T420S? can't wait for it? when?!

2011-02-13, 1:09 AM

It could be a good trade for user like myself -- mostly doing reading, text editing, lightweight spreadsheets on trains and airplanes where no wall plug is to be seen, but then 10% of the time I want a machine that can run a matlab model, or Melodyne music analysis, or other computation intensive activity fast -- and the CPU would be there for that.

 

dhs

Reply
Options

52 Posts

01-30-2011

Germany

174 Signins

431 Page Views

  • Posts: 52
  • Registered: ‎01-30-2011
  • Location: Germany
  • Views: 431
  • Message 106 of 260

Re: T420S? can't wait for it? when?!

2011-02-13, 21:51 PM
i'm totally with dhs.
Low idle power consumption together with max performance if needed would be soo great! My 'Hooray for parallel computing on my notebook' was no joke...
Reply
Options

20 Posts

01-05-2009

Cambridge, Massachusetts, USA

127 Signins

304 Page Views

  • Posts: 20
  • Registered: ‎01-05-2009
  • Location: Cambridge, Massachusetts, USA
  • Views: 304
  • Message 107 of 260

Re: T420S? can't wait for it? when?!

2011-02-13, 22:05 PM

I have a Saab 9-5 and it is a lot like that -- be gentle, and you get good gas mileage. Want some fun, and the tubocharger is there.

 

dhs

Reply
Options

52 Posts

01-30-2011

Germany

174 Signins

431 Page Views

  • Posts: 52
  • Registered: ‎01-30-2011
  • Location: Germany
  • Views: 431
  • Message 108 of 260

Re: T420S? can't wait for it? when?!

2011-02-13, 22:13 PM
VW T5, 174PS, at 8l/100km for longer travel, but able to go 196 km/h or pull some tons ;-)
Unfortunately our old Saab 900 was too thirsty and had not enough doors for all the kids...

Hecke
Reply
Options

52 Posts

01-30-2011

Germany

174 Signins

431 Page Views

  • Posts: 52
  • Registered: ‎01-30-2011
  • Location: Germany
  • Views: 431
  • Message 109 of 260

Re: T420S? can't wait for it? when?!

2011-02-14, 8:11 AM
cptcolo, finally i had the time to read the comparison in detail, did you perform it yourself? Wow.
But if i understand it correctly, the four cores use 1.55 times the power of the two cores when in full operation, right? Wouldn't I then get 4/3rd more stuff done with the same energy? Matlab simulations is a nice example. Ususally i have several small tasks or parameters to be explored. so i could easily fill all four cores with four instances of matlab, giving me a speedup of two with a power rise of 1.5. I would definitely go for the quad core!

best
Hecke
Reply
Options

3322 Posts

07-31-2008

Pakistan

1715 Signins

151632 Page Views

  • Posts: 3322
  • Registered: ‎07-31-2008
  • Location: Pakistan
  • Views: 151632
  • Message 110 of 260

Re: T420S? can't wait for it? when?!

2011-02-14, 14:44 PM

Lenovo has uploaded a video of T420 just an hour ago:- http://www.youtube.com/watch?v=JU1yoC2tVV0


The video talks about UL testing, but you get to see few shots of T420.

------------------------------------------------------------

Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]

IdeaPad: U350

Apple:- Macbook Air [Snow Leopard]
Did someone help you today? Compliment them with a
Kudos!
Was your question answered today? Mark it as an Accepted Solution
de.gif  Lenovo Deutsche Community   es.gif  Lenovo Comunidad en Español 
Visit my YouTube Channel

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms