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Premiere Elite performance enhancements

Discussion in 'TiVo Premiere DVRs' started by brentil, Oct 10, 2011.

  1. Oct 11, 2011 #41 of 234
    Philmatic

    Philmatic Member

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    sbiller, you da man! The photos are great!

    The gigabit switch is likely used to bridge the MoCA interface to the Ethernet port, it's very likely that the Ethernet port itself is still 10/100, which is a bummer. The lack of a true gigabit port on the premiere is one of the biggest brain dead decisions TiVo made...

    Edit: I may have spoken too soon, it looks like the Atheros chip has traces leading DIRECTLY to the RJ-45 port on the back of the premier, can anyone verify that the TiVo is linking up at gigabit? If it is indeed linking up at gigabit, can you try a TiVo To Go or KMTTG transfer and see what speeds you get? Anything over 100mbit would be an indication that the TiVo is in fact connected at gigabit speeds AND is enabled in software.
     
  2. Oct 11, 2011 #42 of 234
    sbiller

    sbiller Active Member

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    Damn Brentil... I hate a challenge like that. It wasn't easy to remove it but I managed to get the motherboard out of the case. I'm not sure I will be able to get it back in there!

    There is a huge discovery on the back. There is another 2GB of RAM on the back from Samsung organized as 64Mx16. I'm a bit confused as to why they would be using a different RAM than the hynix. Part number is Samsung K4T1G164QF. There are qty 2 of these in the middle of the board.

    Here is the data sheet --> http://www.samsung.com/global/system/business/semiconductor/product/2010/10/5/504773ds_k4t1gxx4qf_rev111.pdf

    The smaller chips on the bottom are really difficult to make out. They correspond to the black surface mount blocks on the front side of the board. Maybe their decoupling caps or something.

    [​IMG]

    [​IMG]


    ~Sam
     
  3. Oct 11, 2011 #43 of 234
    brentil

    brentil New Member

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    Sep 9, 2011
    I was about to point that out as it's a lot easier to follow the traces on this design since it has a lot less stuff on the board.
     
  4. Oct 11, 2011 #44 of 234
    P42

    P42 New Member

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    01460
    Philmatic, going from 100mbit to 1gbit does not mean a ten fold increase in transfer speed, if anything there may be a modest increase, depending on the over all workload.
     
  5. Oct 11, 2011 #45 of 234
    aaronwt

    aaronwt UHD Addict

    19,180
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    Northern...

    I never even looked at the connection speed on my Switch. I'll have to check to see if it linked up at 100BT or 1000BT.
     
  6. Oct 11, 2011 #46 of 234
    Philmatic

    Philmatic Member

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    Additionally, the photo suggest that an additional unsocket RJ-45 port is located on the right of the Atheros chip. Possibly for the Preview's different alignment and orientation? It's possible it was something they used in development, but I don't see what benefit that would have over the other two network ports (Ethernet and MoCA)
     
  7. Oct 11, 2011 #47 of 234
    brentil

    brentil New Member

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    Sep 9, 2011
    I think the real reason it's there too as mentioned is you can have the system in MoCA + Ethernet mode so having an embedded switch allows managing all of those data streams internally allowing intelligent switching of where data should go where.

    That region of the motherboard is rather empty now though. I'm guessing the parts there have been moved into one of the items under the mesh cages.
     
  8. Oct 11, 2011 #48 of 234
    Philmatic

    Philmatic Member

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    I understand that, but depending on the level of acceleration provided by the Broadcom CPU, you can see up to an eight-fold increase in network transfer speeds, which is definitely a worthwhile upgrade and could change things significantly for MRS and TTG/Streambaby users. Not to mention being able to transfer a 1 hour cable program (At 8mbps bitrate) in HD in less than 30 seconds.
     
  9. Oct 11, 2011 #49 of 234
    brentil

    brentil New Member

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    Sep 9, 2011
    What we know so far about the S4 Elite hardware.

    [​IMG]

    Code:
    1.  Broadcom BCM7413       System chip
    2.  Numonyx JS28F640       16MB Flash ROM
    3.  Hynix H5PS1G63EFR      128MB DDR2-800
    3b  Samsung K4T1G164QF     128MB DDR2-800
    4.  Hynix H5PS1G63EFR      128MB DDR2-800
    4b  Samsung K4T1G164QF     128MB DDR2-800
    5.  Atheros AR8328         Seven-port Gigabit Ethernet switch
    6.  Entropic EN2510        MoCA interface
    7.  ???                    Silicon tuner
    8.  ???                    Silicon tuner
    9.  ???                    ???
    10. Pulse C6202NL          MoCA 
    11. ???                    HDMI transmitter
    12. WD20EURS               2 TB SATA-3 hard drive
    
    
    [size=1]b = Second pair of DDR2 memory chips reside on opposite side.[/size]
    
     

    Attached Files:

  10. Oct 11, 2011 #50 of 234
    brentil

    brentil New Member

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    Sep 9, 2011
    Then we have the S4 versus the S4 Elite showing how much realestate was saved by removing all of the OTA chips. The Switch & MoCA chips look kinda lonely out there all by themselves compared to the amount of stuff packed into the non-Elite design.

    [​IMG]
     
  11. Oct 11, 2011 #51 of 234
    jfh3

    jfh3 New Member

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    So, the Elite has the same system memory as the regular Premieres then?
     
  12. Oct 11, 2011 #52 of 234
    jfh3

    jfh3 New Member

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    Nice job with the labeling and keying of the components!
     
  13. Oct 11, 2011 #53 of 234
    aaronwt

    aaronwt UHD Addict

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    Plus the Premiere was designed back in 2009. If it were to be designed today with the same features it would still have less chips since in two years there would be improvements and consolidation with them.
     
  14. Oct 11, 2011 #54 of 234
    compnurd

    compnurd New Member

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    Oct 6, 2011
    It does look like it is still 512 which could lend to the software improvements is what is lending to the speed increases which is a good thing
     
  15. Oct 11, 2011 #55 of 234
    Philmatic

    Philmatic Member

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    7 & 8 are likely the two dual QAM tuners and 9 is most likely the QAM tuning switch to manage the 4 tuners. Shame about the 512MB of memory though, it makes sense though when you see that there is 4096Mb of memory on the motherboard and after you divide by 8, you get 512MB.

    Great work though!
     
  16. Oct 11, 2011 #56 of 234
    brentil

    brentil New Member

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    Sep 9, 2011
    I'll fill in the extra ??? once we know exactly what chips they are. Google is not giving me answers yet.
     
  17. Oct 11, 2011 #57 of 234
    sbiller

    sbiller Active Member

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    Would be so much easier if TiVo would just release the schematics to us! ;)

    Nice job on the numbering. Are you sure your not BKDTV???

    ~Sam
     
  18. Oct 11, 2011 #58 of 234
    brentil

    brentil New Member

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    No, just an engineer who loves tech and the TiVos I've had since the S1 first came out. I just for some reason never got into the community until my TiVoHD drive died on me recently.

    Once we've got more data sorted out I do plan to build a more concise info thread, right now we're kinda just bouncing all over the place like kids on Christmas morning. :D
     
  19. Oct 11, 2011 #59 of 234
    sbiller

    sbiller Active Member

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    Yep. I'm an electrical engineer also. I've had TiVo's since my Philips Series 1. I'm almost embarrassed to call myself an EE after I didn't realize we were talking about megabits instead of megabytes! Its been a long time since I designed circuit cards... now I'm a Systems Engineer! :)
     
  20. Oct 11, 2011 #60 of 234
    steve614

    steve614 what ru lookin at?

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    Dallas, TX
    Awesome thread!

    I'm an electrician, but not an EE. I did take digital electronics in college and for as long as I can remember, I've liked taking things apart to "see how they work".

    @ sbiller, you should have watermarked your photos. All the tech blogs are going to steal them. :p:D
     

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