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Samsung low voltage 16gb problems and crappy performance.

post #1 of 6
Thread Starter 
OK so I got this ram thinking 1866 for sure maybe 2133. however when i do anythng other then stock workers fail in prime. I have tried 10-11-10-30-2 1866mhz 1.5 v and 1.14 vccio and every combo for 2133. still workers fail. could this be a bad dimm. in my motherboard or bad ram? thinking is the mothewrboard. if anyone can help out let me know. also when ocing. ram do you need to increase CPU voltage? please help me get to the bottom of this. thanks!
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post #2 of 6
I'm running mine perfectly at 1866mhz 8-9-8-24 1T at 1.5v 1.150vtt (vccio). I didn't get any real gain from trying 2133 because the timings were too loose. I think if you try and back down your CPU OC to maybe 4.8 and try stability testing it again you might see a difference. You might be pushing the IMC too far with 16GB. Also, did you make sure to get the 30nm not the 40nm which looks very similar and has a similar part number? That stuff doesn't OC as well.
post #3 of 6
I had this problem with mine too and I simply needed a LOT more vtt than most other people are using for stability. Try bumping that a few steps. Also, your sig says you have 10-10-10-30-2 2133mhz, did you get it working or did you count your chickens before they hatched? rolleyes.gif
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post #4 of 6
Thread Starter 
what vccio do you recommend? and sig. is wrong. what vccio and dram voltage do u use chaos?
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post #5 of 6
I said try bumping the vtt up a few steps. Every system is different and every set is different. We're not even on the same system and x58 acts differently from p67. I'm also using 6 dimms so my voltages will be higher. If you're not new to overclocking (and I'm assuming you're not if you're overclocking ram) then you should just try in small steps and if it doesn't work, back off and try something different like maybe something scorpion suggested. That's what overclocking is. No one can give you some magic number to plug in. Most people who overclock those sticks use one kit so none of their numbers will work very well for you most likely anyway and definitely won't help me using 6 dimms and up to 8 when I upgrade.
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post #6 of 6
Don't ignore subtimings. You may well need to loosen them, especially with two DIMMs per channel. tRFC is often a culprit.

Also, every IMC is different. Your chip may not like 5GHz + 16GiB of fast memory.

If you suspect you have a bad DIMM, or slot, test them separately.
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