Need new MB for E6750 & SLI

I currently have a P35-DS3R MB that I believe has some bad DIMM slots. I have tested each stick on slot 1 with no errors but as soon as I try to use more than 1 stick, I get memory errors with memtest. I assume that leaves the culprit to be the MB correct? Anyway, I would like to purchase a new MB and this time get one that is SLI compatible so I can run dual 8800GT cards (does my second have to be the exact same model of 8800GT? *EVGA SSC edition*)

Ideas on which MB to purchase? Thanks.

CPU: Intel E6750
Memory: Curcial Balistix 4x1GB 1066
Video: eVGA 8800GT SSC
PSU: CORSAIR CMPSU-520HX 520W
*I don't do any heavy OC maybe just from 2.66 to 3.0
11 answers Last reply
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  1. Quote:
    I assume that leaves the culprit to be the MB correct?
    Not necessarily. What are your settings (timings and voltage)? Getting that memory to work on a SLI motherboard might be as challenging as it is on your current motherboard.
  2. I've tried both auto settings and manual settings (5-5-5-15 as spec by manuf)

    When testing sticks individually they work fine, memtest up to 1700.00% with 0 errors.
  3. What voltage and speed?
  4. set the DIMM voltage to 2.2 and the speed to 1066 so that all settings matched rated settings for the ram. I am able to run the memory at 800 just not the 1066 it is rated at. Weird thing is I only just started to have these problems recently even though no settings have been changed in the bios.
  5. 1066 MHz memory is overclocked 800 MHz memory that's overvolted to make it work. It isn't guaranteed to work. If they run at 800 MHz and 4-4-4-12 timings, then it will be as fast and less voltage should be required.
  6. Cancel that, the memory was returning numerous faults on memtesteven when set at 800.... back to the drawing board I guess.
  7. I don't want to buy a whole new RAM set though if my current set works... I tested them each individually for hours and none of them returned faults when working in slot 1 on their own.... shouldn't that mean it isn't the RAM?

    I dont mind buying a new MB, or new RAM as long as I am sure that is the problem so I am not tossing out a working piece of hardware along with 100 bucks on new hw
  8. Quote:
    I tested them each individually for hours and none of them returned faults when working in slot 1 on their own.... shouldn't that mean it isn't the RAM?
    Absolutely not! The G.Skill kit suggested by shortstuff_mt should work fine as it doesn't require more than 1.9V to run at the rated specs. Another kit that works really well is the PI Black DDR2-800: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231209&Tpk=g.skill%20pi%20black%20800. Running 2 modules always is easier, but I don't have problems running 4 modules of G.Skill on my systems.
  9. Some motherboards just have problems running four sticks of RAM, especially fast RAM that requires a lot of voltage. Sometimes the Northbridge voltage needs bumped up for stability. It would be a lot easier to just get a quality 2x2GB kit that doesn't require high voltage.

    I wouldn't recommend any SLI capable LGA 775 boards since that limits you to the sub-par Nvidia Nforce chipset boards. Doing that will likely open a whole new can of worms.
  10. Alright thanks for all the advice, looks like I will give some new sticks a try.
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