System loses network/internet connectivity, blank screens

TanyaC

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Location
Melbourne
Hi,

My brother has a Win 8 Pro PC with an ASRock Extreme 4, GTX 570SC, 650W PSU, 16GB RAM (2133), running two monitors @ 1920x1080. I built this system for him about a year ago. He has a 120gb SSD too and a DVD burner.

A few weeks ago the system started disconnecting from the Internet and his home network. It also started losing all connection with both monitors, which dropped into stand by. Audio would continue for a few seconds, stutter, and stop and the PC would have to be powered off to recover.

These two symptoms occur randomly and at different times.

In regard to the graphics card, we ran Furmark and could get it to fail every time, so we took the card back to retailer for replacement. They tested it for 3 days and said the card is fine.

We replaced the 570 with a 550 Ti while the 570 was being checked out, and no further problems with have occurred since then. This is about week it has been going fine.

The only difference between the two cards in the 570 uses 2 PCI connections whereas the 550 Ti uses only 1.

After replacing the video card the network problems still exist.

So I'm a little lost as to what might be the problem, and how to track it down.

Any ideas?

Thanks
Tanya
 

My Computer

System One

  • OS
    Windows 7 Ultimate X64
    System Manufacturer/Model
    Home Made
    CPU
    Intel I7-3770K running @ OC 4.6ghz
    Motherboard
    ASRock Extreme6 Z77
    Memory
    32GB G-Skill CL10Q @ 2400
    Graphics Card(s)
    EVGA GTX670 SC 4gb
    Sound Card
    Creative XFI Fataility Platinum
    Monitor(s) Displays
    LG 27" x 2 E2742-BV
    Screen Resolution
    1920 x 1080
    Hard Drives
    OCZ Vertex 4 256GB (OS) SATA 3
    1TB WD1000EARX SATA 3 Data
    WD15EADS 1.5TB
    PSU
    Corsair HX650 Silver Professional Series
    Case
    HAF 932 ADV
    Cooling
    Corair H100 liquid cooler
    Keyboard
    Logitech G110 Gamer keyboard
    Mouse
    Razor Mamba
    Internet Speed
    ADSL 2+ 20.0mbps
    Other Info
    Gigabit infrastructure; Cabling, switches; DSL2750B Modem/Router All PCs connect to Windows 2008 R2 server for website, coldfusion, SQL, Firebird and media sharing & WSUS
It almost sounds like a power supply problem but can't really guess at that from here, intermittent network problems are not so easy to solve, assuming the Op system is not corrupted and still intact, have you tried clearing the cmos?
 

My Computer

System One

  • OS
    Windows 8.1 Pro WMC
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home built
    CPU
    Q9650 @ 4.05 GHz
    Motherboard
    Gforce 780i SLI FTW
    Memory
    8GB Gskill DDR2 1200Mhz
    Graphics Card(s)
    GTX-480
    Sound Card
    Asus D2 Xonar
    Monitor(s) Displays
    HannsG
    Screen Resolution
    1680x1050
    Hard Drives
    Gskill 120GB SSD
    PSU
    Thermal Take 1000watts
    Case
    Thermal Take Xtreme
    Cooling
    9 fans air cooled
    Keyboard
    G15 logitech
    Mouse
    G9 logitech
    Internet Speed
    50mbps
It almost sounds like a power supply problem but can't really guess at that from here, intermittent network problems are not so easy to solve, assuming the Op system is not corrupted and still intact, have you tried clearing the cmos?

I haven't tried clearing CMOS. I'll give that a go..

I insisted that the supplier take a "closer" look at the graphics card, and lo and behold, they have found a fault and are going to replace it. Perhaps the two issues were just a coincidence.

His power supply is fairly new, I have a PSU tester, next time I'm there I'll check it out.

thanks for your help.
 

My Computer

System One

  • OS
    Windows 7 Ultimate X64
    System Manufacturer/Model
    Home Made
    CPU
    Intel I7-3770K running @ OC 4.6ghz
    Motherboard
    ASRock Extreme6 Z77
    Memory
    32GB G-Skill CL10Q @ 2400
    Graphics Card(s)
    EVGA GTX670 SC 4gb
    Sound Card
    Creative XFI Fataility Platinum
    Monitor(s) Displays
    LG 27" x 2 E2742-BV
    Screen Resolution
    1920 x 1080
    Hard Drives
    OCZ Vertex 4 256GB (OS) SATA 3
    1TB WD1000EARX SATA 3 Data
    WD15EADS 1.5TB
    PSU
    Corsair HX650 Silver Professional Series
    Case
    HAF 932 ADV
    Cooling
    Corair H100 liquid cooler
    Keyboard
    Logitech G110 Gamer keyboard
    Mouse
    Razor Mamba
    Internet Speed
    ADSL 2+ 20.0mbps
    Other Info
    Gigabit infrastructure; Cabling, switches; DSL2750B Modem/Router All PCs connect to Windows 2008 R2 server for website, coldfusion, SQL, Firebird and media sharing & WSUS
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