875 neo & 4200 memory problems

Hi, everybody. I did picked up a lot of usefull information from this bord, but was lucky enough not to run intoo problems untill now. Before recently I was using pc3200 memory and was able to oc it up to 450 (in auto mode) but that was the limit. When I changed settings from auto to 333, I was able to reach 260 on Cpu and memory read was still 400. Performance sucked, but it is not the question I want to ask, it was just for the sake of knowing that my 2.8 capable of 3.62.
The problem is that couple days ago I purchased ddr4200/533 by OCZ Technologies that supposedly is supported by 875 neo board.
When I set ddr frq auto, 500, 533 it will not boot, or boot with bios defaullts.
When I set ddr on 400 everything is just fine until I reach 250/500 on those settings it runs rock solid. But don't you know that it is not enough? As soon as I try to change fsb to 255-251(tried them all) it boots, starts loading windows and gives me a blue screen of death. Tried to encrease voltage, change latency, nothing works, the only settings that windows loads compleatly was 251/505 but it crashed in the middle of 3dmark3 back to blue screen of death.
I am quite willing to provide you with more extensive Bios settings of my system if you will just tell me what you all want to know. Any help will be greatly appreciated.

Unfortunately, This is a MAT / PAT issue.
You can try:-
Dynamic Overclocking: Disabled
Performance Mode: Slow
and memory timings of 3-4-4-8, but even at slow performance mode still affects your timings.
Quote
The problem is that couple days ago I purchased ddr4200/533 by OCZ Technologies that supposedly is supported by 875 neo board
This simply is not the case the 875P boards only officially support upto DDR400. The only board to support higher memory speeds are the 865PE Neo2-PS series.
I would use CPU-Z to verify your actual memory timings and Memtest to ensure your memory is actually performing as it should, but I suspect this is a mobo issue.
Join the club waiting for MSI to sort out a BIOS that actually works with this memory.  

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    When i install all the four modules my computer wont bootup it will only give one long beep inducating that there is a memory problem. All four modules where tested separetly with no problems. I have now only the two crusial modules on my Neo 2 Platinum running with no problems.
    Can some one help me so i can use all four modules please???????

    Assuming they will all work together, it sounds like the BIOS isn't set up properly, or the board isn't detecting the speed correctly. When installing more than 2 dimms, most boards, due to the memory controller on the CPU, will set the RAM to the 166 divider, or DDR333. Generally it will also set them to the 2T command rate. 
    If you have a Winchester core you will more than likely need to run DDR333 with the 2T setting. On a Venice you may be able to get away with DDR400...I know on an Opteron you can do DDR400 with the 2T command rate easy enough...I will assume it is probably the same with the newer cores as well.
    Again, IF they all work together (mixing and matching dimms may not always work), you may just need to set the BIOS up properly. Pop in the sticks that work, go into the BIOS and set the RAM to the 166 divider, and then make sure the command rate is on 2T. Be sure all the RAM can run the timings that are set in the BIOS. Save and exit. Then power down and unplug the PC, pop in the other stick and see what happens.
    If that doesn't work, you can try different slots, or an even a lower RAM divider (probably won't make a difference). IMO, if all the settings are correct and it still won't work, I would guess that mixing the RAM is the problem. I have seen it happen - I have also had weird RAM configs work perfectly, so it is kind of hit or miss...I hope some of that helps, good luck.

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