GPU problems, or PSU?

hello every one,
i have just built a new system, the first few times i booted my Asus motherboard told me there were power surges. i was a little worried, but after further research i discovered Asus support recommends to just shut it off. so no worrys there, installed xp and all drivers. Used the computer for a good 2 days, Played a decent amount of GTA4. it was running great. so i decided to try windows 7 out on it, after installing the VGA driver it would give me a BSOD at login every time. after more research, an apparent known problem (but not normally on boot) with that driver. after all this, i decided to ditch windows 7, stick with xp.
And this is where my problems started.it would just restart when i tryed booting xp, so i ended up just reinstalling windows xp on it. it worked fine untill, i try loading gta, it would restart... problem got worse after reinstalling windows again (thought maybe the drivers got messed up or something, cuz i couldnt get it out of 16bit mode, with dirvers) now it reboots when i go to the asus page to try to upgrade drivers, or when i try opening a picture... not wanting to deal with at the time being, i made it dual boot with Ubuntu. what also worked great at first. untill i installed the GPU driver for it.... after restarting, open the Nvida control panel thing, display goes all crazy, turns into patterns.. this is when i stiped using this computer. i dont want to break it.. its all brands new.
I'm worried it may be the PSU because of the MB telling me it was surging. when i check the volts in the bios, they seem to be pretty unsteady, but staying close to the +/- 5%. other times i checked it was stable as could be.
im worried it may be the GPU because of the restarting when opening GTA4, and having problems on 3 OS's after driver install. i just find it weird it worked fine before installing windows 7.
A friend told me to check the ram, i will be doing a memtest tonight.
a few more notes: i know its not over heating, good airflow, wire-management. A positive case pressure (3in:2out), good Cpu cooler, cold room temp. the power supply seems to be of low quality but,
heres a link to the PSU: http://www.xoxide.com/logisys-550w-pcix-clear.html
GPU:http://usa.asus.com/product.aspx?P_ID=o7FrMH9W00nDL1Ml
MB:http://usa.asus.com/product.aspx?P_ID=ef0qgvMIwOUagAVl
And ram:http://www.newegg.com/Product/Product.aspx?Item=N82E16820231098

if u need any other stats/pics/whatever please ask.

Any and all help will be appreciated.
4 answers Last reply
More about problems
  1. ok, so ram passes the mem test... any one ideas?
  2. how long did you let MemTest86+ run?
    Have you tried:
    Verifying the correct RAM voltage and timing?
    Booting with just one stick of RAM?
    Clearing CMOS?
    Using a different PSU?

    in fact, just for the heck of it, take a look here:

    http://www.tomshardware.com/forum/261145-31-read-posting-boot-problems

    Just go through it all to double check. Don't skip on anything, and then come back with the results of the checklist.
  3. If your getting wavering voltage messages, that's a bad thing.

    Download OCCT and run the CPU / Memory / GPU and PSU torture tests.....if voltages on graphs at end are not flat, get rid of the PSU.
  4. i have verified ram voltages. they are at 1.9, but as for timing, i could not figure out how to check/change. bios only game me three options for timing. in fact i dont even know what ram timing is, ill have to wiki it later. i have cleared the cmos multiple times, and do not have another psu. MemTest86+ ran for 10 passes. and for that list, step 21. If you have integrated video and a video card, try the integrated video port. i was planning on trying this shortly too..

    OCCT is a nice tool. it seem to run pretty steady in the program. however i witnessed my vcore voltage drop to .05 for about 1.5 seconds. only once in like 3 hours of testing, and it was in an idle stage. shortly after it froze and restarted.

    EDIT: i pulled out the video card. and everything works fine.. but i was doing some more stress testing, and witnessed my vcore surge to 3.0 volts! during the same tests i also witnessed my 12V rail dropping to below acceptable limits. along with the 5V rail.... so obviously i need a better power supply. i shouldn't have cheeped out. but overall i have had no crashing using the On-board video. so does this mean, that both are bad?
Ask a new question

Read More

New Build Systems