HELP unstable RAM needs tweeking


I was having BSOD using stock settings maybe once a week.
So I went into BIOS and changed manually to the manufacturers ratings.
(1.6V & 7-8-7-24 2n timing)
(rated at 1600 but in BIOS i can choose 1132, 1534, 1933 so i chose 1534)

I boot into windows fine and so far hasn't crashed but when I run PRIME95 blendtest, fails in about 3 seconds.
It didnt pass blend test and stock either.

I'm trying to get it so that it will pass the PRIME95 Blend test.
Please give me suggestions on what to tweek in bios.

I dont know if i need to change QPI and should i leave frequency at 1534?
shouldn't it be stable because its underclocked?
Should i just leave the frequency on (auto)?
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More about help unstable tweeking
  1. The memory speed rating is for the highest stock CPU settings and was pretested for everything your CPU could throw at it at those default settings, if you're seriously overclocking your CPU, you are simply taking the memory past what it's capable of running.

    GSkill never claimed the memory would be remain stable if the CPU is overclocked to lets say 5.0Ghz, so if you're overclocking the CPU, drop the memory speed until you find a stable speed for the CPU clock, leave the timings at the stock settings.

    Once you get in stable territory you can tighten the timings some.
  2. Ok you posted the same thing in another section (which I replied to) and you never stated anything about overclocking.

    Don't you think that would be helpful information when trying to determine your problem?
  3. CPU: core i5-750 OC'd to 4ghz
    Bclck: 191
    Multiplyer: 21

    vcore: 1.37
    vtt. 1.23
  4. I went to BIOS and enabled XMP and still failed the prime95 blend and memtest
  5. Unfortunately, diagnosing and addressing this problem will be a tedious, time-consuming, methodical tasks. You cannot jump straight to Windows and play games if you want to diagnose this problem. Prime95 is by no means the best way to check RAM stability. I wrote this earlier today for a RAM diagnosis problem. Sorry if it only 90% applies to you.

    Step 1) What is the make and model of your PSU? If you're in Windows, install and run HWMonitor and tell me all the voltages it gives you (3.3V, 5V, +12V, -12V, CPU). If you're not in Windows, go to your Bios and look at the Hardware Status or Health menu and tell me what voltages it reads out. I doubt this is your problem, but always start at the PSU.

    Step 2) Install Memtest86+ to a flash stick. Power off your computer and disconnect your hard drive so you don't waste time accidentally booting Windows.

    Step 3) Since you think RAM is the problem... Remove all sticks except for 1 and cycle it through all the RAM slots on your board and see if it posts consistently with any of the slots. I had a motherboard where the first two slots had to be set slower than the other two. Repeat with all your other RAM sticks to determine if any configuration posts consistently. If not, then it's less likely that it's the RAM. (Do not connect your hard drive). Only connect 1 stick in whichever slot works best.

    Step 4) When you do get your computer to POST, go to your Bios and load defaults. Change your RAM to 1066MHz and 9-9-9-30 timings w/ 1.65V or whatever the RAM reads on it. Save and Exit and boot to your flash stick. Run through at least 1 cycle of Memtest86+, two would be better. Swap your RAM sticks and repeat Memtest86+. Put in all your RAM and repeat Memtest86+. If you pass two complete Memtest86+ run throughs without seeing any errors such as freezes or error messages (should take about 30 min per run through), your RAM is not the problem.

    Step 5) Does your computer consistently POST? With whichever RAM sticks and slots that work connected and set to 1066MHz 9-9-9-30 (Auto on all the rest), enter your bios. Check that your CPU speed and voltages are set to manufacturer defaults (Intel has a helpful webpage for every CPU). Connect your hard drive and boot Windows.

    Step 6) In Windows, start HWMonitor. Keep an eye on voltages because they shouldn't fluctuate much at all. Tell me your idle CPU temp. Now run LinX on a problem size of 10000 for 3 loops. Did it freeze, BSOD, crash, or return errors? Stop LinX if you exceed max temps specified by Intel (go with 70C for C2D, 80C for Nehalem). Did it freeze or crash? If your temps don't get too hot, run LinX for 20 loops and see if it gets errors. If not, then it's not your CPU or RAM.

    Step 7) Install MSI Afterburner with Kombustor or install Furmark. Run Kombustor/Furmark, monitoring your GPU temps. Do you get errors. If so, download new drivers and perform a custom "Clean Install". Check your device manager (after a restart) to see if there is any software lacking drivers. Attempt to describe your restarts. At this point (if nothing else was erring out, it's VERY likely that it's a bad PSU. Alternatively, it may be a bad mobo. RMA one of them.

    Please report any unusual errors or stumbling blocks in the above processes.
  6. Obviously I was saying really slow RAM settings. So bump them up from the speeds I suggest above (to whatever your RAM reads on the sticker on the side) and Memtest86+ with that.
  7. I just flashed newest bios and restored defaults.
    Here's the first part.

    Hardware Monitor:
    VCORE - 0.88
    VIN1 - 1.72V
    +3.3V - 3.36V
    +5V - 5.04V
    +12V - 11.93V
    VIN6 - 0.93

    I don't think its the PSU.
    I have a Corsair HX series 850 which is a nice one i think.

    I need to run memtest through flashdrive so ill be back.
    I ran memtest in windows version and the ram failed those but ill do ur method too.
  8. 11.93V is definitely lower than I'd expect. But the Corsair HX850 is not the problem. That's a great PSU (better than mine) because my TX850 isn't modular. I think they both have the same FSP hardware though.

    Hmmm...memtest86+ fail? Well, at least you know it's the RAM. Reduce your settings until it passes consistently. If you have no reason to believe it's a single stick that's bad, you can just run all your sticks at once. If you're populating four slots, your controller probably won't be able to handle the same speed.
  9. Alright. I ran memtest86+ and found 1 out of the 2 sticks is bad.
    I confirmed by trying the bad stick in different slots. Failed so hardcore.

    As for the other stick, it went through all the tests and gave a pass at the end. no errors.
    I confirmed by checking in different slots.

    What do you think dalauder. RMA these sticks?
    (btw how long does RMA usually take? First time)
  10. You do realize that there is only one slot that you can use when you have only a single stick?

    See your motherboard manual and use only that slot for a single stick of RAM.

    Although you say you confirmed by checking different slots? How odd. You should read the motherboard manual for RAM positioning with one, two or four sticks anyway.

    You RMA both if purchased as a kit or just the single bad one if they were purchased separately.

    Another option is to buy more RAM (for a total of 8GB?) while you wait or try to just send in one stick even if you bought as a pair.

    (do not get more than 8GB)
  11. It depends on the motherboard about the stick placement. I've used several motherboards that don't care which slots the RAM goes in. But if it starts up in a slot, then it's working. If it gives you errors in Memtest86+, then it's not working.
  12. Yup. One of the sticks definitely fails.

    And photonboy, the manual said I could use two of the four slots. (They are color coded)

    So I bought both sticks as 1 kit so should i RMA them both?
  13. Yes...but you may want to contact them and see if they can send the parts first or you can only send in one stick so you're not without a computer for a couple weeks. Sometimes companies are accommodating, but they usually aren't.
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