Video Card artifacts and Memory errors

Hello,
I bought used parts.


Intel Core i5-760
Asus P7P55D
OCZ Gold 8GB (4x2gb) DDR3 PC3-10666 CL9
Saphire Radeon HD 6850
Enermax Liberty 400Watt PSU ELT400AWT
For now I use HDMI cable not DVI to connect to a monitor.


When I first turned on computer first thing I saw were artifacts.
http://oi45.tinypic.com/fep6vr.jpg
http://oi49.tinypic.com/14mue5s.jpg

I thought video card is broken, so I need to change it, but that's not only problem I had.
I couldn't even install Windows 7 32 or 64bit. I got memory errors all the time.°
So I removed RAMs one by one.
What I noticed with RAMs are -
1) with 4 RAM modules I couldn't install windows I got memory errors
2) With one RAM modelue computer didn't even start, just black screen and no beep sound at begin.
3) also computer didn't started when I put two modules in slot 1 and 3.
4) I could start computer and managed to install windows with two modules in slots 2 and 4.
5) I could start windows (already installed) with all 4 modules. And it showed 8Gb RAM. But time by time I got Memory

errors
6) Windows Memory diagnostic tool didn't show any error.

I installed ATI drivers and artifacts became even worse.
http://oi49.tinypic.com/2dha2o0.jpg

Cataclyst stops to work constantly, with all four RAMs windows explorer stops working and restarts all the time.

Sometimes I get blue screen.


Bug Check String MEMORY_MANAGEMENT
Bug Check Code 0x0000001a
Parameter 1 00000000`00041790
Parameter 2 fffffa80`0635c9a0
Parameter 3 00000000`0000ffff
Parameter 4 00000000`00000000
Caused By Driver ntoskrnl.exe
Caused By Address ntoskrnl.exe+71f00
File Description NT Kernel & System
Product Name Microsoft® Windows® Operating System
Company Microsoft Corporation
File Version 6.1.7600.16385 (win7_rtm.090713-1255)
Processor x64
Crash Address ntoskrnl.exe+71f00
Full Path 1 C:\Windows\Minidump\101912-14570-01.dmp
Processors Count 4
Major Version 15
Minor Version 7600
Dump File 272,408


What may cause so many problems at once?
It seems that one or even two parts are broken, most likely broken is/are -
*PSU
*Motherboard
*Video Card
*RAMs
5 answers Last reply
More about video card artifacts memory errors
  1. My guess is the person you bought the GPU off OCed it then fried it.

    Can you run a Memtest (google and download CD). That will tell us if RAM is faulty, though it sounds like it is.
  2. Only 400W PSU
    try a PSU: get it from a friend
  3. I tested RAMs with Memtest86, indeed RAMs have many errors.

    But the problem is, even after 37 hours test haven't finished, so i stopped it. Does test suppose to last so long?

    I don't have any log, just screenshot with over 100k errors. And I don't know which RAM is defect or all are. As I said if just one RAM is used it just won't start a computer.

    http://oi49.tinypic.com/16jrjgn.jpg

    So Video Card shows artifacts and RAMs are defect.

    Am I really so unlucky and got two defect parts or these bugs maybe are caused by defect motherboard or PSU?

    But how can all four modules be defect? One yes, but all four together? Seller just keep saying that everything was fine.

    Could there be compatibility issues with RAMs?

    And could defect RAMs or any other defect part cause artifacts or it's just Video Card issue for sure?
  4. I was wrong saying that with one RAM module computer doesn't start, it does. But only form 4th slot, on slot 1,2,3 it doesn't. I can take any RAM module, it's same. And of course artifacts persist.

    With memtest at least till now no error shows, but I need to do more testing.

    So now I think that motherboard might be defect.
  5. iliani007 said:
    Only 400W PSU
    try a PSU: get it from a friend


    That's why I chose this video card, it consumes only about 120 Watts on full load.
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