Asus p8-z68-v and i5-2500k system instability, help

Before I describe the problem, here are my specs....
CPU: Intel i5 2500k @ stock frequency
GPU: MSI radeon 6950 2 gig (not flashed/reference design)
Mobo: Asus P8-Z68-V
Ram: 8 gig Gskill Ripjaws 1600 mhz
HSF: Coolermaster V6-GT
HDD: 1 TB barracuda 7200 rpm, 32 mb cache
SSD: OCZ agility III 60 gig boot drive

I have been having problems with random freezing. Whether it's surfing the web, or playing games, the computer will freeze and the CPU indicator LED is solid red on my case. About 1 in 5 times this happens, the computer will recover and continue working after about 2 minutes, the other 4 in 5 I need to restart. I used to think this was caused by overclocking the CPU (I was running at around 4.7), but I cleared CMOS and went back to stock frequencies, and the freezing continued. I have also heard about a new Bios for the Asus P8-Z68-V, and I tried to use EZ flash utility to implement it, but the utility would not recognize is because it was "not an EFI bios". If anyone could shed some light on this, it would be great.
20 answers Last reply
More about asus 2500k system instability help
  1. check the temperature! sounds like something is overheating buddy (cpu or GPU)..

    ALso, what PSU do you have?

    Download CPUZ http://www.cpuid.com/softwares/cpu-z.html

    and find out what the CPU and GPU are running at.. they both should be below 60 degrees Celsius.
  2. Nothing is overheating, I've stress tested the CPU for around 12 hours and it peaked at about 70 during it. The GPU is fine too, I monitor it using MSI afterburner. Wouldn't it BSOD if something was overheating? Oh, and I have the Lepatek 700 watt 80+ gold PSU.
  3. You need to update your BIOS. Correct ASUS EZ Flash 2 is the best and only method to use.

    Perhaps seeing the right way might help; see -> http://www.tomshardware.com/forum/289507-30-what-flash

    Also assuming ASUS P8Z68-V, download a new copy of your BIOS -> http://www.asus.com/Motherboards/Intel_Socket_1155/P8Z68V/#download
  4. Q - What PSU?

    Based upon what's listed a 650W minimum and 750W preferable if full OC CPU + GPU.
  5. I have a lepatek 700 watt 80+ gold PSU. And thanks, I will try and use EZ flash 2 correctly and see if it fixes anything
  6. I didn't mean it to sound that way, but yes hopefully the guide and video in the link will help.

    Good Luck!
  7. Well, honestly, I didn't actually know how to use EZ flash correctly. I formatted a flash drive to FAT32, and successfully updated the bios. I will keep you posted if the freezing continues. Thank You for your help! :D
  8. I'm in the same situation and really don't know where the problem is. Now i'm running the computer without case, on the integrated graphic with one ram stick and one hdd. My bios is up to date and the ram passed 14 pass of memtest86+ 4.2.

    Here is my configuration

    Intel i5 2500K stock speed
    Asus p8z68-v Pro
    8GB Gskill 1600 9-9-9-24 1.5V
    1TB Black WD hdd
    MSI Twin Frost II GTX 560ti
    Antec HCG-750 PSU
    Stock cooler... for now
  9. #darkblade069:

    run MSCONFIG -> select Diagnostic; if that solves the problem(s) then you've got a conflict. Also, download and re-install ALL of the drivers listed for your OS -> http://usa.asus.com/Motherboards/Intel_Socket_1155/P8Z68V_PRO/#download

    DO NOT use the ASUS AI Suite II utilities; uninstall ALL of them. They are BIOS invasive and cause 20X problems vs Help.
  10. wow i had the same EXACT problem as you and i just bought my new pc 3 days ago and i was ready to return it for them to fix then i figured it out.
    my specs are
    i5 2500k
    asus z68 deluxe
    corsair 850watt plus gold
    2x XFX 6950 2gb crossfire
    OCZ 120 gb vertex 3 max iops "sata 3 mode"
    2x wd caviar black 2tb "sata 3 mode"
    8gb corsair vengance ram

    Anyways your problem has nothing to do with your processer what so ever! I thought OC was my problem too. I can tell you right now its your SSD drive. Your Intel rapid storage driver is interfering with your system and causes those pesky freezes and stalls
    Fixing it was easy after i found a thread on google and everything is working 100% fine and not a SINGLE freeze Also dont worry this fix works for your SSD too not just vertex


    Install the Latest Intel RST (Rapid Storage Technology) Software
    Intel is frequently making updates to their Rapid Storage Software. Expect more to come out to completely fix this problem. For now, install the latest version for optimal performance. You can find and download the latest Intel RST Software here.

    Edit your Registry File to Fix the Vertex 3 from Freezing and Locking up, and Increase Performance
    This step is a little tricky, but here we go. I highly recommend this because it solved virtually all the issues my drive had, and even increased the performance. This is a work around to the problem with the Intel RST Software.

    Copy the entire quote below:

    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port0]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port1]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port2]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port3]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port4]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port5]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    Open notepad and paste it. Save the file as “ocz.reg” and make SURE your selected file type is “all”. This should turn the file into a registry file. Now open the file and hit yes to add. Restart your computer and it should be done!
    Note: Only do this if you know what you are doing. We do not take responsibility for your actions. I have used this fix and had success along with many others. You can view the original post written by Zoork here. Don’t worry, this works for multiple solid state drives, not just the C300.
  11. Typically an 'iaStor' problem is because the BIOS and Windows aren't matching-up; Start = 0 = AHCI and Start = 3 = IDE. So if Start = 3 and BIOS = AHCI then Windows is loading the wrong drivers.

    Simple Fix -> http://support.microsoft.com/kb/922976
    Verify see -> http://i1013.photobucket.com/albums/af254/Jaquith/AHCI_Start_0.jpg
  12. darkblade069 said:
    I'm in the same situation and really don't know where the problem is. Now i'm running the computer without case, on the integrated graphic with one ram stick and one hdd. My bios is up to date and the ram passed 14 pass of memtest86+ 4.2.

    Here is my configuration

    Intel i5 2500K stock speed
    Asus p8z68-v Pro
    8GB Gskill 1600 9-9-9-24 1.5V
    1TB Black WD hdd
    MSI Twin Frost II GTX 560ti
    Antec HCG-750 PSU
    Stock cooler... for now


    I have the exact same motherboard, CPU and the exact same memory and HDD as the OP and having similar problems.

    My problems only occur in 3D games and when running 3DMark11's CPU physics test. Never in regular Windows operation.

    I don't use a SSD, so I don't think Rapid Storage Technology applies to me.

    I have updated the BIOS and all drivers, still have the problem. My thinking in another thread I posted was that it's possibly the PSU, but it looks like people with the exact same CPU/mobo are having similar problems. What's the solution??

    Mention that it could be HDD related has given me some new ideas of things to try, but what can I fiddle around with on a simple 7200RPM SATA3 drive?
  13. ^The (2) common problems are: 1. Undersized PSU and 2. BIOS.

    As a PSU gets older it loses it's capacity or a loss of 15%~30%.

    RE: "3D games / 3DMark11's CPU physics" stresses the PSU. Also, try different GPU drivers both newer and older; use WHQL versions.

    Try - http://www.corsair.com/psufinder/
    Also note the comments on the bottom; especially 'capacitor aging' - http://www.thermaltake.outervision.com/
  14. Thanks Jaquith, that's also what I am thinking at this point about the PSU. The PSU I have is only half a year old and 600W, which the online wattage need analyzers tell me is pretty much borderline (I'm gonna assume that the sellers of PSUs aren't gonna underestimate power needs).

    I have tried running the same tests with superfluous hard drives and fans unplugged, pretty much only the mobo/cpu/GPU and one HDD running off of the 600W supply and still have the same problems.
  15. "superfluous hard drivesand fans" each HDD 15W~25W and each Fan 5W. IF the PSU fan is running fast then it's a good sign you're under powered.

    The OP's minimum PSU should be 650W with no room for OC'ing, and 750W for OC'ing.
  16. I solved my problem. Underpowered PSU notwithstanding (will definitely replace before adding anything else).

    A couple people here mentinoed they have the Ripjaws RAM, like I do. Could happen with any brand, but I did find that one of the sticks was faulty.

    I booted with Memtest-86 and ran v4.0. It froze up part-way through the test each time I tried. I then loaded up v3.0 and got an error message then freeze. So, I removed one of the memory sticks and tried it with just one stick in slot 1 (or is it 0?) and it ran fine. I then swapped it out for the 2nd stick. Same issue came back again.

    Went back to the one stick that worked and tried the same things again that were causing my computer to freeze up, mainly the 3dMark11 physics test. Passed with flying colors numerous times. Slightly lower 3dMark, probably because of less RAM, but I'm running fine now on just the one 4 gig stick. Will get the faulty one exchanged tomorrow.
  17. Sure if Memtest fails then either the BIOS is messed up or perhaps the RAM itself. Most BIOS will turn-off a bad stick. Try booting with 1 stick, swap, and test the other; typically a boot failure is the easiest way to know which stick is bad.
  18. I had a similar issue with my new build, as follows:

    ASUS P8Z68 V-PRO GEN 3
    i5-2500K
    Radeon 5830
    8GB G Skill 12800 (9-9-9-24)
    2 x OCZ Vertex 3 (Raid 0 configuration) for OS
    2 x OCZ Agility 2
    1 750GB Caviar Black HDD

    I was getting random freeze (lock-up) with the screen display staying on from point of lockup. No ability to CTR-ALT-DEL, no mouse response, etc... only reboot possible. Ran Memtest for 4 hours with no errors. Eventually I re-FLASHed BIOS (I was already up to date but, just to be sure), and re-installed OS (Win7) -- except the 2nd time around I installed drivers downloaded directly from ASUS site... I DID NOT INSTALL FROM ASUS install DVD!!! Been running for about a day now with no freezing.

    Coincidentally, I still have two issues:

    1. BIOS does not recognize USB memory stick as a BOOT PRIORITY option. (However, it is strangely available as an device that I can select BOOT OVERRIDE from -- can't figure this one out, any help is appreciate)

    2. CPU temp is fairly normal but, if I run prime95 it quickly shoots up above 80 and even broke 90 before I killed the program for fear of overheating the CPU. This may not be at all related to any other issues, and may just be the fault of using the stock thermal paste when installing the CPU....
  19. di4medollaz said:
    wow i had the same EXACT problem as you and i just bought my new pc 3 days ago and i was ready to return it for them to fix then i figured it out.
    my specs are
    i5 2500k
    asus z68 deluxe
    corsair 850watt plus gold
    2x XFX 6950 2gb crossfire
    OCZ 120 gb vertex 3 max iops "sata 3 mode"
    2x wd caviar black 2tb "sata 3 mode"
    8gb corsair vengance ram

    Anyways your problem has nothing to do with your processer what so ever! I thought OC was my problem too. I can tell you right now its your SSD drive. Your Intel rapid storage driver is interfering with your system and causes those pesky freezes and stalls
    Fixing it was easy after i found a thread on google and everything is working 100% fine and not a SINGLE freeze Also dont worry this fix works for your SSD too not just vertex


    Install the Latest Intel RST (Rapid Storage Technology) Software
    Intel is frequently making updates to their Rapid Storage Software. Expect more to come out to completely fix this problem. For now, install the latest version for optimal performance. You can find and download the latest Intel RST Software here.

    Edit your Registry File to Fix the Vertex 3 from Freezing and Locking up, and Increase Performance
    This step is a little tricky, but here we go. I highly recommend this because it solved virtually all the issues my drive had, and even increased the performance. This is a work around to the problem with the Intel RST Software.

    Copy the entire quote below:

    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port0]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port1]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port2]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port3]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port4]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port5]
    “LPM”=dword:00000000
    “LPMDSTATE”=dword:00000000
    “DIPM”=dword:00000000

    Open notepad and paste it. Save the file as “ocz.reg” and make SURE your selected file type is “all”. This should turn the file into a registry file. Now open the file and hit yes to add. Restart your computer and it should be done!
    Note: Only do this if you know what you are doing. We do not take responsibility for your actions. I have used this fix and had success along with many others. You can view the original post written by Zoork here. Don’t worry, this works for multiple solid state drives, not just the C300.



    Windows is saying that the file is not a binary registry file. Help??
  20. Just manually add the new values to the registry.

    start>run>regedit

    Go to the path indicated - [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\

    Right click Parameters and select New>Key

    Name first Key Port0

    Select the new key port0, right click port0>new>dword and name first one LPM, 2nd LPMSTATE and last one DIPM

    Do these same steps from Port0 to Port5

    When finish restart the computer
Ask a new question

Read More

Asus Intel i5 Motherboards