Question about what my PSU tester is telling me...

Hi everyone. I ran into a problem with my computer recently. My computer decided not to post and display any image. It seems to power up most things, but the video card would rise in power, then lower, and repeat. It seemed the PSU was faulty but I wasn't sure. I just got my PSU tester in today and ran my PSU through all the tests. Everything passed, HDD, 4/6/8 pin, SATA, floppy, except the 24pin connecter. When I plugged that in, i got +3.3v, -12v, PG, +5VSB, +12v and +5V to light up. The one that didn't light up was the -5V. Does this indicate that my PSU is faulty and causing my computer not to post by not providing the right power to the motherboard? Thanks.
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  1. I had a power supply that did similar, that one WAS faulty, but at the same time i had a faulty bios because of the power supply, if you can get hold of a spare psu from a friend or something, try the tester on the -5v rail, and see what happens, if you get the same results on both psu's its probably your bios.
  2. hmm. Well what happened was I had someone on ebay buy my computer, decide to ship it back un-opened, and I didnt have the PSU seated properly and got knocked around a good amount. So from the beginning I assumed it was the PSU. I don't have a spare one to test and was hoping this test would be definite on weather it was the PSU or not so I can call up newegg with confidence. If it is the bios, where do I go from there? I called up gigabyte tech support and ran through all their tests to make sure it isn't the MOBO. The lady said it was either PSU or CPU, but I don't think it is the CPU. Any other thoughts?
  3. well it turns out I had a spare PSU to test. This one only uses the 20pin connector but I got the same results as I did with the 24pin connector. Everything was lit up besides the -5v light. So do you believe it is the BIOS? Where do I go from here? Thanks.
  4. tj89890 said:
    well it turns out I had a spare PSU to test. This one only uses the 20pin connector but I got the same results as I did with the 24pin connector. Everything was lit up besides the -5v light. So do you believe it is the BIOS? Where do I go from here? Thanks.


    For bios' in general, they are best kept up to date, so if you go to the manufacturers website for the mobo, you should find a download for the bios, you might be able to do it by using a USB stick, depending on what mobo it is, follow the instructions to flash the bios from there, it's not too easy, but fairly self explained :)
  5. tj89890 said:
    Hi everyone. I ran into a problem with my computer recently. My computer decided not to post and display any image. It seems to power up most things, but the video card would rise in power, then lower, and repeat. It seemed the PSU was faulty but I wasn't sure. I just got my PSU tester in today and ran my PSU through all the tests. Everything passed, HDD, 4/6/8 pin, SATA, floppy, except the 24pin connecter. When I plugged that in, i got +3.3v, -12v, PG, +5VSB, +12v and +5V to light up. The one that didn't light up was the -5V. Does this indicate that my PSU is faulty and causing my computer not to post by not providing the right power to the motherboard? Thanks.

    -5v is an old standard no longer used in most modern systems = pin is left empty on ATX12V v2.01 and up.
    If your 24pin doesn't work = ya it's faulty!
  6. Anonymous said:
    For bios' in general, they are best kept up to date, so if you go to the manufacturers website for the mobo, you should find a download for the bios, you might be able to do it by using a USB stick, depending on what mobo it is, follow the instructions to flash the bios from there, it's not too easy, but fairly self explained :)


    Thanks for the reply. Before I invest more time into this, how can I be sure it is a BIOS problem? Isn't this BIOS issue software related? I never tried flashing my BIOS in the past. Could you please explain how a BIOS can become faulty on its own? Thanks.
  7. The psu may be giving decent power when not under load, but when under load it might be dropping too low to boot properly... ignore the -5v, looking at specs, it isnt used any more :O
  8. Your bios has nothing to do with your power issue.
    http://www.youtube.com/watch?v=5FWXgQSokF4
  9. Delivering good power under low load, but not enough ender higher loads, even the mobo being plugged in can be too much if the PSU isn't up to scratch...
  10. davcon said:
    Your bios has nothing to do with your power issue.
    http://www.youtube.com/watch?v=5FWXgQSokF4



    I've tried that PSU test and it works. Like had been said, possibly under heavier loads my PSU isn't able to output enough power. It's a 850watt PSU, but may have been damaged. Is it possible for a PSU to be faulty, even if it doesn't show any signs besides the computer not booting up? Is there any way I can prove my PSU isn't putting out enough power before I try and RMA it back to newegg? Or should I just go ahead and call up newegg and RMA it? Thanks for the replys.
  11. I'm going to try out a new test quick. I'll plug my PSU to the mobo/vid card/ and everything else I can and then test out some of the extra 6/4 pin connectors to see if they still give out the proper power while my PSU is under heavy load. Not sure if this will be conclusive, but seems like it's worth a shot.
  12. Put it in a system that definately works and see if it powers that fine, if it works fine in there, its your system, not psu, or, borrow another psu, stick it in your system, if your system works with a new psu, then your old one is faulty...
  13. Anonymous said:
    Put it in a system that definately works and see if it powers that fine, if it works fine in there, its your system, not psu, or, borrow another psu, stick it in your system, if your system works with a new psu, then your old one is faulty...



    hmm, I do have an older sysem I can test it out in. BUT this system is OLDER. Like from 2001. So I'm not sure if that will prove anything compared to trying to power up a system with a 5870 and other higher power demanding components. I'll see if I can borrow a PSU from a friend.
  14. im using a sytem from the windows 98 era :O still serves well as a hard drive and psu test rig for pretty much everything (old hard drives are good for power tests as they weren't as efficient and drew a lot of power for not much performance) so an old machine from 2001 shouldn't be tooo bad... although it would be much better if you could try your psu in your friends pc, and/or his psu in your pc. I will look into this more tommorrow, well later on today (00.16am) as i need sleep :0
  15. a little extra note... if you put the 850w psu into the old 2001 pc, try sticking a disk in the cd/dvd drive, that draws a lot of power ;)
  16. Thanks for all the replys. I'll give it a try on the older PC with the PSU. If I can't figure it out I think I'll just call up newegg tomorrow and try and rma it. When I turn on my newest PC it doesn't sound like it's getting much power at all and it seems to power cycle. I did take my old PSU and only plug the 20pin connector(it's all it had) into the new mobo without a 4pin connector(which is requires) and I got all the same error lights light up on my mobo. So that may prove my computer isn't getting the right amount of power.
  17. Could very well be a faulty gpu btw.
  18. You say error lights come up on your mobo? Have a look and try find out what they mean, i can't look now... Need sleep lol, ill check up on things later after ive got some sleep guys :3
  19. davcon said:
    Could very well be a faulty gpu btw.


    If it is the GPU, should I still be getting the same error light son the mobo even when the gpu isn't plugged in?
  20. Try the psu in the old machine, it can even just be the motherboard that is drawing to much power, if the psu has same problem Fter taking out the graphics card, itll be lesz difference putting it into the old system :)
  21. I mean the power drawn would be less different ;)
  22. tj89890 said:
    Thanks for the reply. Before I invest more time into this, how can I be sure it is a BIOS problem? Isn't this BIOS issue software related? I never tried flashing my BIOS in the past. Could you please explain how a BIOS can become faulty on its own? Thanks.


    I would advise not to touch the bios unless you have a good reason to believe it is actually faulty. to Flash it you need a stable system, if the unit crashes half way though there is a good chance of a scrap system board. (unless you have a BIOS backup / restore function on your system board)

    unplug every thing, so just your CPU, PSU, Motherboard. listen for beeps. These are BIOS error beeps . As you have no memory in and video card in atm this is normal. - you get lots of beeps. if you get beeps your mainboard and cpu are working and your power supply is still working (but still may have a fault) If you don't get anything out of the system (fans are not spinning, no beeps ect). Then you have an issue with either PSU, CPU. motherboard.
    Take spare PSU, any will do at this stage as long as it fully populates your mother board power connector. what happens?
    if it powers up its you PSU replaced rebuild happy days.
    If it still fails reset BIOS to defaults use the onboard jumper to clear CMOS, or remove the CMOS battery and wait a few mins. try power it back up with the spare PSU and the original PSU. if this gets it running (fan's on beeps ect.)

    Now plug in Memory, re power up. Still beep or dead?
    Now plug in your graphics card remember many need a lot of power to run, but many even with the extra power connector not connected will power up and display something. if you choose to power up with out the extra power connector don't run it in to windows or for to long.

    by this time you should have a good idea of what is up with the system.

    N.B.
    Updating firmware for no real reason is not a good thing to do. only do it if you know that the update will fix a problem you are having (listed in the readme file that comes with the download). If it goes wrong it can destroy your Mother board for no good reason...
  23. oh just a thought if you have a damaged USB socket this can cause power up issues.
  24. davidgermain said:
    oh just a thought if you have a damaged USB socket this can cause power up issues.


    Thats interesting you say that becuase when the PSU was knocked around, it was hitting the two cords that plugged into both the usb sockets. Also, for some reason my reset button doesn't work anymore. Not sure if that would have to do with a PSU issue. Unfortunetly, I don't have a case-speaker to hear any error beeps. I'm going to bring my PSU into work and see what the IT guys can tell me. At least all my major components are still under warranty, I just have to pinpoint the one at fault.
  25. Rugger said:
    Motherboard speaker for BIOS beeps: http://www.frys.com/product/6488702?source=googleps



    Thanks for the link. At the moment I'm at lest 90% sure it's the PSU. I unplugged everything from the motherboard, including taking out the ram and gpu. I plugged in the 24pin connector and on start-up the cpu fan was spinning at full speed. Now when I shut it down and plugged in the 8pin connector to power the cpu on and started it up, the cpu fan was spinning at 1/4 of the original speed at most. I'm pretty positive it's not putting out enough power. The psu was also the only item to get knocked around while being shipped. So I really believe that is the problem. If not I'll get that case speaker.
  26. So I called up Rosewill tech support to get an RMA on this PSU. The guy asks me what video card I use and I said a 5870. He then tells me my PSU has four rails at 20amps each and that the GPU i was using required 40amps. He said my warranty was voided because it is under the category of being mis-used. Does this sound rediculous to anyone else? The PSU was working fine for over a year and a half. Maybe I should just call back and say a different story, that I was using a cheaper gpu? lol. Anyways, can anyone recommend me a good PSU to buy around $60? Thanks.
  27. I just went on newegg and checked out the product details of the PSU I have and no where does it speak of amps. All it says concerning rails is that it has four 12v rails. Nothing mentioned about amps. So what rosewill tech support is telling me if that I have to do a search for the product manual and read everything carefully, as with my gpu. That's rediculous. He seemed like he was buding a little when I explained I had to be a tech expert to not mis-use this thing. He then told me I'd be better off buying a psu with two rails at 40 amps anyways. I explained to him if I can RMA this psu and get a new one that I could sell it and buy the proper PSU. He kind of agreed with me but still went down hill from there. He really seemed like he was tyring to find any technical reason to make my warranty voided.
  28. tj89890 said:
    So I called up Rosewill tech support to get an RMA on this PSU. The guy asks me what video card I use and I said a 5870. He then tells me my PSU has four rails at 20amps each and that the GPU i was using required 40amps. He said my warranty was voided because it is under the category of being mis-used. Does this sound rediculous to anyone else? The PSU was working fine for over a year and a half. Maybe I should just call back and say a different story, that I was using a cheaper gpu? lol. Anyways, can anyone recommend me a good PSU to buy around $60? Thanks.

    NVidia recommends a minimum 500W with 40A total on the 12V rails - it does not require 40A on a single 12V rail. This is absolutely ridiculous. You could try changing the story, but I would push th issue. I'm surprised that their customer service is giving you this type of runaround and misinformation. Let me know how they treat you....if they don't take care of you, then I'll think twice before I recommend their Capstone PSUs again!

    Outstanding PSU...Seasonic S12II-520W at $10 over your budget. 40A on the 12V rail, great build quality, 80+ bronze, 5 year warranty.

    Edit: Link to S12II 520W http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094&Tpk=s12ii%20520w
    Other option: Antec Earthwatts 500W http://www.newegg.com/Product/Product.aspx?Item=N82E16817371035 44A on (2) 12V rails, 3 year warranty about the same price as the Seasonic.
    Corsair Builder CX 600W; has a 15% discount code that ends 3/7 and a $10 MIR; Will cost you $59.50 at checkout and you get another $10 from the MIR. Only 80+ (not Bronze certified), 40A on the 12V rail (same amount as the 520W Seasonic. http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028
  29. What is your Rosewill PSU model again?
  30. Rugger said:
    What is your Rosewill PSU model again?



    I have a rx850 d-b. Thanks, I'll look into that PSU you suggested. I was reading on rosewill website that my warranty is also voided if the item is damaged through shipping and/or has any physical damage to it. Either way, there goes that. Still made me mad the tech at rosewill treated me like that. After he said I needed a PSU that had 40amp on one rail and that it was a mis-use of product, I told him it's the same thing except it's split up into four rails at 20amp and just combines what it needs. He just ignored that and kept saying it was a mis-use. His logic is flawed, because no PSU will last forever. So if I had a gpu that used 20amps, it will still wear down the PSU over-time. I don't see what's different from using a 40amp gpu and having the psu use two rails of 20amps to power it. It'll just wear it out over time like any other. Now 40 amp is max load, so it won't always be using that much.
  31. Also...is there a cheaper PSU you could recommend? I plan on selling this computer again once I fix it. So I don't want to invest too much more money after losing a PSU over the first try. Just something that will work just fine, nothing special. Thanks.
  32. Rosewill Green 530W for $50. 80+Bronze, 41A on a single 12V rail... http://www.newegg.com/Product/Product.aspx?Item=N82E16817182199
    That's the least expensive PSU that I found that meets the specs for your GPU without going to less reputable brands like Raidmax, HEC, Diablotek (and I wouldn't trust their rating claims anyway). A 5870 requires a bit beefier PSU and that requirement has a cost associated with it...
  33. Rugger said:
    Rosewill Green 530W for $50. 80+Bronze, 41A on a single 12V rail... http://www.newegg.com/Product/Product.aspx?Item=N82E16817182199
    That's the least expensive PSU that I found that meets the specs for your GPU without going to less reputable brands like Raidmax, HEC, Diablotek (and I wouldn't trust their rating claims anyway). A 5870 requires a bit beefier PSU and that requirement has a cost associated with it...


    Thanks :)

    I found the S12II 520W for $59 + shipping + $5 off coupon at Super Biiz. I might just end up getting that. Newegg is also doing a deal on all Corsair PSU's right now so might look into that. Either way thanks for all the help. Much appreciated!
  34. Glad I could help out and hope the new PSU fixes your PC!
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