Back to investigating network discrepancy

Discussion in 'Windows 7 Networking' started by RodBarnes, Aug 6, 2016.

  1. RodBarnes

    RodBarnes Senior Member

    Dec 8, 2011
    Likes Received:
    I'm trying to figure out why my htpc is suffering at streaming videos from the net. htpc is running Windows 7 SP1 with all the patches etc., except the annoying Windows 10 stuff. (I've not upgraded this to 10 nor do I plan to as it is an htpc using MediaCenter.)

    htpc Configuration
    OS: Windows 7 Home Premium x64
    Motherboard: Gigabyte GA-890GPA-UD3H, 2.6GHz
    BIOS: Award FE, 09/30/2010
    Chipset: AMD 890GX
    CPU: AMD Athlon II X4 600e, 2.2GHz, AM3
    RAM - 8 GB:
    • Patriot DDR3, 2GB, PC3-8500F, 533MHz (x2)
    • Crucial DDR3, 2GB, PC3-10700H, 667MHz (x2)
    Video - HDMI
    • AMD Radeon HD 6850, 1GB GDDR5, 1GHz
    • 2TB Western Digital HDD SATA 2 (WD20EARS-00S8B1)
    • RAID 0, 1TB Seagate SATA 2 (SG31000538AS)
    TV Tuner:
    • Hauppauge WinTV-HVR-2250 dual-tuner ATSC

    Another computer to which I've been comparing it (brawn) has since been upgraded to Windows 10 but even when brawn was running Windows 7 SP1, it never exhibited any issues with lag or bandwidth.

    brawn Configuration
    OS: Windows 10 Pro x64
    Motherboard: Asrock Z97 Extreme6
    BIOS: American Megatrends P1.70 12/17/2014
    Chipset: Intel Z97
    CPU: Intel i7-4790 3.6GHz LGA 1150
    RAM - 8 GB:
    • G.Skill DDR3 4GB PC14900 800MHz (x2) [F3-14900CL9D-8GBSR]
    Video - DVI/VGA, dual monitor
    • Zodac (Nvidia) GeForce GT 640
    Drives - C: 240GB NTFS; D: - 465GB NTFS; I: - 465GB ReFS; J: - 700GB ReFS; K: - 700GB NTFS:
    • 250GB Samsung SSD 850 EVO SATA 3
    • 500GB Samsung SSD 850 EVO SATA 3 (x3)
    • 750GB Samsung HDD 753LJ SATA 2 (x3)

    I recognize that brawn is a more powerful computer but I don't think the processing power difference accounts for what I am seeing in the network results -- read on...

    I did a test with htpc sitting in the same room as the router and brawn. I ran BitMeterOS to monitor bandwidth and streamed the same movie from Amazon prime (Maggie). I ran the tests with htpc over both WiFi (5Ghz) and the ethernet and the results/bandwidth was comparable, really no significant difference -- lagging occurs in both cases.

    On brawn, results were smooth with zero lag. On htpc, it lagged periodically -- a skip about every 10 seconds. Looking at the attached files, it shows brawn averaging 351 kB/s with consistent 1 MB/s spikes while htpc is averaging 1.68 MB/s with inconsistent 4-6 MB/s spikes.

    Can you help me understand why htpc is apparently pulling down more data for the same movie as brawn?
    Can you help me understand why, despite this, htpc is lagging but brawn is not?

    Attached Files:

    #1 RodBarnes, Aug 6, 2016
    Last edited: Aug 6, 2016

    BIGBEARJEDI Fantastic Member
    Premium Supporter

    Jan 28, 2013
    Likes Received:
    Bottom line: older computer, slower performance. The i7 CPU is WAY more powerful than any Athlon CPU. that's 6th gen Intel So I chip. Chipset and onboard Mobo busses have icreased transfer speeds, larger on-chip cache sizes, faster DMA transfers between RAM and CPU, GPU, etc.


    Sent from my VS986 using Windows Forums mobile app
  3. RodBarnes

    RodBarnes Senior Member

    Dec 8, 2011
    Likes Received:
    As noted, I recognize the significant difference in overall performance between the two systems. I can see how it might be reflected in the lagging. But how would that explain the discrepancy in bandwidth; i.e., htpc is showing MORE bytes downloaded for the same movie stream?
  4. Neemobeer

    Neemobeer Windows Forum Team
    Staff Member

    Jul 4, 2015
    Likes Received:
    If the data received on the htpc is being corrupted by a hardware problem then the data would get re-sent which would result in what appears to be "more data" and because of the corruption you get skips.

    A wireshark capture could confirm this.

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