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  1. #1
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    How to tell a bad CPU?

    What are the tell-tale signs that you have a bad CPU on your hands? More specifically, one that you just bought and came out of a retail box that's never been used before? I assume that if the PC boots and you're in Windows and everything the CPU is fine, right?

    Gaming Rig
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  2. #2
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    Re: How to tell a bad CPU?

    About the only way I know of is to install it in a mb with known good working components.

    My first x2 4200 gave me all kinds of headaches with reboots and bsod's from the get go so I rma'd it and got a 4400 in place of it which worked flawlessly. I knew the components where in good working order as my 3700 was previously operating fine before installing and after removing the 4200.

    Needless to say I chalked it up to a flaky processor, for some reason it just wouldn't run stable.

    Have you tried making a boot floppy or boot cd with memtest86 to check the memory, is it a new mb?
    i7 Beast: Asus P6T Deluxe, Intel i7 920 21x191 (4000) HT on 1.3875v, Swiftech GTZ/D5/BIX2
    6GB (3x2GB) G.Skill pi Black DDR3 1600, ECS 9600GT
    CM STACKER 810, PC Power & Cooling Silencer 750


    i7 Game: Asus P6T, Intel i7 920 20x180 (3600) HT on 1.275v, TRU-120
    6GB (3x2GB) G.Skill DDR3 1333 7-7-7-18, MSI GTX260 OCv2, Dell 3007WFP LCD
    CM STACKER 830, PC Power & Cooling Silencer 750


    AMD: Biostar 790GX A2+, PII X4 940BE 17x200, Freezer 64 Pro
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    Corsair VX450

  3. #3
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    Re: How to tell a bad CPU?

    The motherboard is fine. In fact, I've only had it a couple months. It worked flawlessly with my 3200+ and a 3800+ I had installed. The memory is also fine. I've run memtest and Prime with the current MB and RAM and there were no issues. I overclocked both CPU's even without any incident of freezing or reboots. Something just seems little strange. Also, like I wrote below, I installed XP using the 3200+ since the 4400+ was giving me problems. I had zero issues while using the 3200+. Here's a little more of what happened prior to flashing the bios to the newest version:

    I just got my 4400+ chip today as well as a new Raptor HD. I installed both at the same time. It appeared everything was fine. The computer posted and I saw the new CPU info and got into bios to change a couple of minor settings (time, date, boot device priority, etc.). I tossed in my XP Pro install disc and just before the computer was going to get into the XP setup the computer restarted itself. Then I tried again, this time I got into the XP install, but it froze up when telling me to press F2 if I wanted to do a system repair. So I restarted again, the next time it got a little further and then froze again. I thought something was up with the HD, but then I went into bios and not 10 seconds into being in bios, the computer froze up and I couldn't navigate bios. This made me realize it wasn't a hard drive issue. So I proceeded to put my previous 3200+ chip in and try again. So far XP is practically done installing and I've had no issues. So this leads me to believe the problem is one of two things... 1) bios or 2)bad CPU. I assume though that if the CPU was bad I wouldn't even be able to boot up.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
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  4. #4
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    Re: How to tell a bad CPU?

    Try disabling anything not neccissary in the bios, usb ports, serial/pp ports, anything not absolutetly needed.

    A bad cpu doesn't neccissarily have to be a doa, like I mentioned with the problem I experienced with my first x2 4200 and ended up rma'ing it for a x2 4400 which worked fine with the same components. I fought it for about three weeks and when I couldn't resolve the issue I called for the rma before my 30 days was up.

    If you can't get the x2 to finish the os install with the 4400 but it works fine with the 3200 you've probably got a cpu issue or as you mention a bios issue.

    If I'm not mistaken even with early bios's that don't properly recognize an X2 they will largely just be limited to single core operation but still function as a normal A64.

    Try manually locking the vcore for the 4400 in the bios to 1.35-1.4 and check to see if cool and quiet is disabled, if not try disabling it.
    i7 Beast: Asus P6T Deluxe, Intel i7 920 21x191 (4000) HT on 1.3875v, Swiftech GTZ/D5/BIX2
    6GB (3x2GB) G.Skill pi Black DDR3 1600, ECS 9600GT
    CM STACKER 810, PC Power & Cooling Silencer 750


    i7 Game: Asus P6T, Intel i7 920 20x180 (3600) HT on 1.275v, TRU-120
    6GB (3x2GB) G.Skill DDR3 1333 7-7-7-18, MSI GTX260 OCv2, Dell 3007WFP LCD
    CM STACKER 830, PC Power & Cooling Silencer 750


    AMD: Biostar 790GX A2+, PII X4 940BE 17x200, Freezer 64 Pro
    4GB (4x1GB) Ballistix Tracer DDR2 800, Powercolor 4850
    Corsair VX450

  5. #5
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    Re: How to tell a bad CPU?

    I did disable the Legacy USB support as I found previously that this gave me issues when overclocking my memory, however I haven't overclocked anything with this CPU yet. Even so, I disabled it anyway. I already have disabled Cool & Quiet so that's covered. I disabled onboard sound and RAID functionality as well since I don't need them.

    I tried three times to install XP last night (prior to switching back to my 3200+) and didn't even make a dent in OS installation. I know it wasn't overheating either.

    I'm running the latest bios so hopefully it's not a bios issue. When I was having problems with the 4400+ during OS installation I had the bios that came with the motherboard and it worked perfect every single time I had to access bios (which was often) and NEVER had an OS lockup or reboot at stock settings or even when overclocked for that matter. So I'm thinking that the new BIOS did help, BUT at the same time I'm having a hard time explaining why the computer froze up twice this morning when trying to open 3 apps simultaneously. As I said though, this was after installing the AMD dual-core optimizer, which I've since uninstalled. You'd think that the installation of that app would create problems though. In any case, something seems suspect to me and I can't help but think something is up with the CPU.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  6. #6
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    Re: How to tell a bad CPU?

    There's a thread floating around here somewhere about the optimizer, I experienced hard locks after installing the optimizer and others have experienced pauses posibly similar to what your explaining, some haven't experienced any issues with it so ymmv.

    However not being able to install the OS doesn't have anything to do with the optimizer, hot patch, or processor driver, there's some other underlying issue there.

    You may want to try reseting your bios via the mb jumper and remove the battery for a few minutes, then load optimized defaults and reboot, go back into the bios and set things where you had them.

    Sometimes the bios gets fubar'd for whatever reason after flashing, cmos values different with carried over saved settings from the earlier bios rev than with the newer bios maybe. There used to be like a 20 step process for some experiencing issues with DFI boards, maybe worth the effort to try.
    i7 Beast: Asus P6T Deluxe, Intel i7 920 21x191 (4000) HT on 1.3875v, Swiftech GTZ/D5/BIX2
    6GB (3x2GB) G.Skill pi Black DDR3 1600, ECS 9600GT
    CM STACKER 810, PC Power & Cooling Silencer 750


    i7 Game: Asus P6T, Intel i7 920 20x180 (3600) HT on 1.275v, TRU-120
    6GB (3x2GB) G.Skill DDR3 1333 7-7-7-18, MSI GTX260 OCv2, Dell 3007WFP LCD
    CM STACKER 830, PC Power & Cooling Silencer 750


    AMD: Biostar 790GX A2+, PII X4 940BE 17x200, Freezer 64 Pro
    4GB (4x1GB) Ballistix Tracer DDR2 800, Powercolor 4850
    Corsair VX450

  7. #7
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    Re: How to tell a bad CPU?

    Quote Originally Posted by highoctane
    However not being able to install the OS doesn't have anything to do with the optimizer, hot patch, or processor driver, there's some other underlying issue there.
    I think you're absolutely right. This leads me to think all the more that possibly the bios that shipped with my board had some sort of incompatability with the CPU. I had the OS installation issues with the default bios. Unfortunately I couldn't install the OS with the new bios because I needed that Internet connection to get it and needed to make a boot disk from Windows. I really DON'T feel like installing XP again because of the PITA I had to deal with last night over the phone with MS to activate my copy. With the new bios I hadn't experienced any issues yet with bios locking up or XP freezing until I installed the optimizer.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  8. #8
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    Re: How to tell a bad CPU?

    Well folks, I'm knocking on wood as I write this, but I may be in the clear. As suggested to me in another thread it looks like there's an AMD driver specifically designed for the dual core CPU's that I had not installed. Installing that driver as well as the dual-core optimizer app from AMD hasn't frozen up XP yet and I haven't had any sort of issues booting up since updating my bios. I'm keeping my fingers crossed that all of these updates are going to put me in the clear.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  9. #9
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    Re: How to tell a bad CPU?

    Here we go again. Now I'm wondering if things are okay after all. I finally got into ovclocking the CPU after thinking it was running just fine at stock speeds. I'm currently running at 2.5 ghz and Prime is stable and memtest shows no errors either. I haven't had any strange reboots or freezes within XP, but I've been noticing some weird problems when playing a couple games. The first game I noticed problems with is Black & White 2. It seems to play fine for a couple of minutes and then just freezes out of nowhere. The second game is Age of Empires 3. I noticed what looks like textures popping off the screen in small square or rectangular shaped patterns. My first thought was that maybe I overclocked my video card too much, but I never noticed any problems when testing using 3dmark05 or the RTHDRIBL artifact tester. I decided to turn down the video card settings to stock just to be sure and I still get the problem. It's not a video cooling issue because my temps are very low. My CPU temps are low too. I don't think graphical glitches can be related to the CPU, right? I should also mention that I saw no graphical glitches in Black & White 2. It just hard locked the computer.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  10. #10
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    Re: How to tell a bad CPU?

    make sure you never took the gpu too far, ocing can be a blessing and a curse you know

    reading everything else above the only way to know is to take that vid card elsewhere and if does it there, then ya know

    or bring another card in and if no issues, then suspect the card
    honestly im thinking it is the vid card, a flaky vid card can cause all of the issues you have stated above. if you took the oc too far at one point permanent damage might have happened, hey its possible and it does happen to folks

    just something to consider, ill bet your cpu is fine, its strange the fella above had a doa cpu, thats usually the one thing you never have to typically worry about being doa, i never have, but there will probably be a day i do come across one, knock on wood so far so good though just a silly question, does that graphics take dedicated psu power also, what are you psu specs, again just drawing straws but maybe is possible your psu is borderline to begin with and the new cpu might just draw a touch more and cause that nudge to send the cart over the hill? honestly man imho its a crap shoot at whats wrong, just trying to give you other avenues to consider

    great advice above, go bare minimal and see if the problem exists, then add in stuff slowly one by and and see if it returns, when it does happen the last course of action usually is the finger pointer

    good luck
    Last edited by JeremyWills; 08-07-2006 at 01:43 AM.
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  11. #11
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    Re: How to tell a bad CPU?

    try folding superpi,and cpu stability test

    add a couple 120mm fans overhead to drop temps by 10+ celsiusD.S.C-12(2)-disclaimer : whatever u do with your hardware/software is your
    responsibility, which i dont hold if u break anything

    GRAB here OcBible v1.55 and Guidemania v1.21
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  12. #12
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    Re: How to tell a bad CPU?

    Systems specs are as follows:
    Athlon 64 4400+ Toledo @ 2.5 Ghz (10x250)
    Arctic Cooling Freezer 64 Pro HSF
    Asus A8N32-SLI Deluxe Mobo
    2 gig (2 x 1 gig) G.Skill F1-4000USU2-2GBHZ RAM (3-4-4-8-1T)
    Sapphire ATI x1800XT 512 MB (668/774)
    Arctic Cooling Accelero X2 video card HSF
    Antec TruePower 2.0 550w PSU
    Thermaltake Armor Case
    Windows XP Pro SP2
    Edit/Delete Message

    I suppose it could be the video card. I don't think I overdid it on the overclocking, but maybe it just decided to crap out. I'm going to be real bummed if that's the case.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  13. #13
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    Re: How to tell a bad CPU?

    Quote Originally Posted by _dangtx_
    try folding superpi,and cpu stability test
    Prime is fine. Haven't come across any instability.

    Gaming Rig
    Asus P7P55D Deluxe Mobo
    Intel i5 750 2.67ghz OC'd @ 4.0ghz w/ Coolermaster Hyper 212 Plus HSF
    Corsair 4GB(2 x 2GB) XMS 3 (CMX4GX3M2A1600C9)
    EVGA GTX 570 Superclocked
    WD Velociraptor 300gb Hard Drive
    Corsair VX550W PSU
    Antec 300 Case

    Daily Driver
    2.7 ghz i7 Mac Mini
    8gb RAM

  14. #14
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    Re: How to tell a bad CPU?

    32million superpi? and how about cpu stability test? leave it going 30min-1hr

    add a couple 120mm fans overhead to drop temps by 10+ celsiusD.S.C-12(2)-disclaimer : whatever u do with your hardware/software is your
    responsibility, which i dont hold if u break anything

    GRAB here OcBible v1.55 and Guidemania v1.21
    scary pooch?pooch#1taking ball from dogpooch pulln on ropeme on board after 2 years
    of no board
    http://gonny.se/ <-cool lady http://www.mediafire.com/?8dmg21ms1vx
    IN MEMORY OF HOW BM WAS TREATED HERE...

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