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1.6v 2133 @ 11 able to go to 1.5v 1600 @ 7 or 8?

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June 10, 2012 7:25:50 AM

Can DDR3 2133 1.6v @ 11 CAS run at 1.5v 1600 @ 7 or 8 CAS? I jumped the gun ordering the latter with a 2700K @ Z68 motherboard. After reading a post I found that my 2700K will only support 1.5v, 1.6/1.65 with stability issues. So I'm hoping to run the 2133 @ 1600 with lower volts and timings, but not sure if it's possible.

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a c 241 } Memory
June 10, 2012 4:08:24 PM

In most cases that is possible! You can look up the ram on manufacturers website and see the spd settings for that speed
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a c 347 } Memory
June 10, 2012 4:21:15 PM

Guessing games?

Look at the 'SPD' tab of CPU-z of the kit and you'll know what has been proven to work. Kits like F3-17000CL11D-8GBXL (1.5v-1.6v) yep but other kits??!! If there's a JEDEC ~800MHz @ 1.50v then yes, but if the voltage says 1.60v then no.

My experience with most G.SKILL's, if that's what this is, is that most DDR3-2133 kits have a ~800MHz @ 1.50v JEDEC option. However, often many have a 'crappy' DDR3-1600 options with CAS very high (slow) CAS Timings. In any case always run Memtest at minimum 4-passes or more -- more if not running per Rated.

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June 10, 2012 7:36:57 PM

Wow, never knew how to read the 'SPD' tab on CPU-Z! Thanks! Also, on my 775 mobo atm, my memory is 2.1v 1066. BUT I see JEDEC #1 266 Mhz with 1.80v, JEDEC #2 400Mhz 1.80v and EPP#1 533 2.1v. What is EPP? and will I possibly see this with the DDR3 kit?
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a c 347 } Memory
June 10, 2012 8:29:41 PM

EPP (Enhanced Performance Profiles) is the precursor to XMP (Extreme Memory Profile) they're encoded speeds with the RAM set -- little different than JEDEC (f/k/a Joint Electron Devices Engineering Council).

EPP was found on DDR2 and prior to DDR3.
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June 11, 2012 10:22:10 AM

Best answer selected by tydalwave.
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a c 146 } Memory
June 11, 2012 9:33:47 PM

This topic has been closed by Nikorr
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