06-16-2013 11:34 AM
36 12
tools
  1. a5cent's Avatar
    http://www.qualcomm.com/sites/defaul...s-06.07.12.pdf

    Combination of 1 Ghz CPU coupled with Adreno 305 - MSM8627 or MSM8227

    See the combination of 1.5 Ghz Dual Core Krait coupled with Adreno 225 - MSM8960

    As we can clearly see how powerful Adreno 225 compared to 305 especially in handling camera MP and Display resolution.

    1.2 Ghz Dual Core Krait + Adreno 305 = Replaces 1.5 Ghz Dual Core Krait + Adreno 225
    ! Ghz Dual Core Krait + Adreno 305 = Weaker , Only Replaces Adreno 205 Devices with slight bumps in performances in GPU but leaps in CPU
    I feel I must guess what you are trying to say. I would appreciate more clarity of expression.

    It appears you are trying to say that the A305 is weaker than the A225 due to the camera and display resolution limitations you've mentioned. That makes no sense, because those aren't at all limitations of the GPU, but rather limitations of the SoC (or other components on the SoC)!

    However, we're discussing the GPU, not the SoC. Even if that were otherwise, the camera and display resolution limitations are entirely irrelevant to XENOPHOS, because neither the L820 nor the L720 incorporate hardware that bumps up against those limitations. The only exception is camera recording resolution, where the SoC in the L720 limits the device to recording 720p, whereas the L820 achieves 1080p, but again, the GPU isn't part of that equation.

    So, the A305 truly is the more powerful GPU, although as link68759 mentioned, not necessarily noticeably so.
    05-10-2013 12:18 PM
  2. Sanjay Chandra's Avatar
    GPU pushes pixels and graphics.

    If u increase resolution , fps goes down , so in order to get decent fps at higher resolution , GPU strength must be increased because it,must push more pixels while maintaining frame rate.

    More resolution for same GPU = less fps
    To compensate lower frame rate , they must either increase channel bandwidth or increase cores.

    Adreno 305 is nowhere near to handle 1080p at decent frame rate , that's why it's limited to 720p display and also camera is limited to 13 MP or so.

    Comparing that with 225 , it can push 1080p at decent frame rate and also has better ISP along with better GPU to capture more pixels at same time.


    Since L820 has same resolution as L720 , he is going to experience better frame rates and also better bandwidth channels.

    Not to forget L820 has 2.25 times more RAM than 720.
    (398 MB Usable RAM Vs 898 MB Usable RAM)
    xandros9 and X0LARIUM like this.
    05-10-2013 01:07 PM
  3. a5cent's Avatar
    Adreno 305 is nowhere near to handle 1080p at decent frame rate , that's why it's limited to 720p display and also camera is limited to 13 MP or so.

    Comparing that with 225 , it can push 1080p at decent frame rate and also has better ISP along with better GPU to capture more pixels at same time.

    Since L820 has same resolution as L720 , he is going to experience better frame rates and also better bandwidth channels.
    Your theoretical knowledge sounds fine and all, but it completely falls to pieces when you attempt to apply it.

    1)
    You are confusing video recording resolutions with display resolutions. Although you claim it does, the MSM8227 (as used by the L720) actually doesn't support 720p display resolutions. What it can do is record video at 720p, which is lower than the 1080p the MSM8960 achieves (as used by the L820).

    However, as previously stated, video recording resolutions are largely independent of the GPU! Anyone can prove this to themselves just by looking at the spec sheet of the brand new Snapdragon 400 series, which all incorporate the exact same A305 GPU, but don't have those same limitations.

    2)
    You state that since the L820 and the L720 share the same display resolution, the L820 should exhibit better frame rates as you believe it to be the better performing GPU. However, all you need to do is look at the benchmark I provided to see that is utter BS! C'mon, read!
    X0LARIUM likes this.
    05-10-2013 04:27 PM
  4. Sanjay Chandra's Avatar
    Your theoretical knowledge sounds fine and all, but it completely falls to pieces when you attempt to apply it.

    1)
    You are confusing video recording resolutions with display resolutions. Although you claim it does, the MSM8227 (as used by the L720) actually doesn't support 720p display resolutions. What it can do is record video at 720p, which is lower than the 1080p the MSM8960 achieves (as used by the L820).

    However, as previously stated, video recording resolutions are largely independent of the GPU! Anyone can prove this to themselves just by looking at the spec sheet of the brand new Snapdragon 400 series, which all incorporate the exact same A305 GPU, but don't have those same limitations.

    2)
    You state that since the L820 and the L720 share the same display resolution, the L820 should exhibit better frame rates as you believe it to be the better performing GPU. However, all you need to do is look at the benchmark I provided to see that is utter BS! C'mon, read!
    Sorry , before I was using phone to see pdf didn't see the top heading as Display and Video recording , I forgot about display abbreviations totally

    About Display : Yes like u said L720 doesn't support 720p displays
    MSM8227 or MSM8627 - Both support FWVGA Display which is equal to 854480 resolution (maximum supported) Can support the standard 800 x 480 = Current crop of Lumia 520/620/820 etc.
    MSM8960 or MSM8660A - Both support WUXGA Display which is equal to 19201200 resolution (Maximum supported) Can support the standard 1920 x 1080 = 1080p

    Your benchmark is showing performance of either :
    APQ8030 or
    MSM8230 or
    MSM8630 or
    MSM8930

    That chip you are seeing in benchmark u have is not MSM8627 or MSM8227

    There are lot of chips which support Adreno 305 but none of them support even 720p display or 1080p recording which clearly shows weak performance.

    Clock speed can effect whole SoC
    Last edited by Sanjay Chandra; 05-10-2013 at 10:57 PM.
    05-10-2013 10:25 PM
  5. X0LARIUM's Avatar
    Coming to slightly real world scenario...how about the performance of games and apps? Will they resume faster? Even the stock apps and not third party apps?
    Right now on the 720, the apps take two to three seconds to resume, Skype etc.
    There is no Temple Run I see anywhere on the Store, for ...obvious reasons.

    So, keeping Frame rates away, how will it help me in day-to-day operations?

    Will it work faster than the 305, considering its found in the likes of iPhones and S3s...?

    Thanks to all the people who have replied BTW...really really good of info there.. :)


    Sent from my Π Σ Χ U S 4.
    05-11-2013 04:38 AM
  6. josh_ua's Avatar
    There is no heat issue. My 820 has never even felt the slightest bit warm.
    Wow! Good for you, my 820 heats up as hell, especially while playing and surfing. Although I understand that it's summer here and I live in a tropical country. :)
    05-11-2013 07:03 AM
  7. X0LARIUM's Avatar
    Wow! Good for you, my 820 heats up as hell, especially while playing and surfing. Although I understand that it's summer here and I live in a tropical country. :)
    By surfing ...how much does it take to heat it up? I too surf a lot..

    Sent from my Π Σ Χ U S 4.
    05-11-2013 08:10 AM
  8. WorzelGummage's Avatar
    My daughter watched about an hour of Spongebob over 3 G on my 920 and the phone got fairly hot. Which is to be expected.
    05-11-2013 08:15 AM
  9. X0LARIUM's Avatar
    Argument over...Got my 820!!
    05-12-2013 09:08 AM
  10. nchethan's Avatar
    So how are you finding your new L820?

    What are your observations and would you recommend it to others who're confused between L720 or L820.
    06-15-2013 03:51 AM
  11. tvolpe86's Avatar
    my aunt just got the 820. battery isn't even lasting half the day when idle and barely being used. she got the phone free so i'm looking into a battery with larger capacity for her. her battery is fine when data is turned off, which unfortunately defeats the purpose of a smartphone lol.
    06-16-2013 11:34 AM
36 12

Similar Threads

  1. Replies: 4
    Last Post: 04-06-2013, 03:34 PM
  2. asphalt 7 trial: what's it missing vs paid version?
    By ishaan_666 in forum General Phone Discussion
    Replies: 5
    Last Post: 03-30-2013, 03:47 AM
  3. And so it begins
    By narv in forum New to the Forums? Introduce Yourself Here!
    Replies: 3
    Last Post: 11-25-2012, 05:18 PM
  4. And so it has begun
    By btgusto in forum General Desktop, Laptop & Tablet Discussion
    Replies: 6
    Last Post: 06-07-2012, 02:28 PM
  5. So seriously - Battery Life
    By Deflord in forum Windows Central Archive
    Replies: 4
    Last Post: 07-06-2011, 09:00 AM
LINK TO POST COPIED TO CLIPBOARD