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vargis14
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Memory overclocking questions

Sat May 09, 2015 5:42 pm

Hi everyone...hope you are all excited with the weekends arrival as I am:)

Anyway I was wondering if any of you have had luck overclocking your memory on your sandy,IVY and Haswell CPU's with a 100mhz bus speed.
As for overclocking I will give you a example. Say I am running DDR3 1600 with rated latencies of 9,9,9,24, 1T and I want to run it at DDR3 1866 speeds with loosened timings like 11,10,11,10 26 2t timings. That type of overclocking is what I am talking about . Running your Ram a speed bump or 2 higher than its rated speed.

I am looking for anyone and everyone who has done this and what brand memory along with its name and stock timings and speeds they came with and what you were able to up your speed to along with your timings and speed you got your memory to run to. Ohh almost forgot Voltages also and I do not recommend anyone goes over 1.65 volts trying to do this if your just trying it now from seeing this post.

This could be a good starting point for people with ddr3 1600 or whatever memory to run it at the next faster speed bump or 2 if it is worth it for whoever is doing it.

Thanks ahead of time and I look forward to seeing what people are doing. Besides just running at the stock XMP profile :D
2600k@4848mhz @1.4v CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LG 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system
 
JustAnEngineer
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Re: Memory overclocking questions

Sat May 09, 2015 6:15 pm

What's the point? The difference in memory speed has only a small effect on system performance. Corruption and crashes are bad, mmkay?
Most modern DIMMS have multiple XMP profiles. Choose the one that makes you happy.
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vargis14
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Re: Memory overclocking questions

Sat May 09, 2015 6:53 pm

JAE,
With the size of this forum I thought it would be a great place to get a baseline on what brand memories are friendly at running a speed bin higher with slightly loosened timings and if needed a little bumps in the ram voltage. "ONCE AGAIN I CAN't STRESS THIS ENOUGH DO NOT USE OVER 1.65VOLTS it can damage your memory controller. Actually when Sandy Bridge came out Intel warned that 1.65 volts was dangerous on the dance floor err memory controller:) but tons people used the suggested voltage of 1.65 volts that was suggested for their memory and I did not hear of any CPU failures using 1.65 volts.

Here is one article showing Haswell going from ddr3 1600 and up can give you gains above 10% in some cases http://www.corsair.com/en-us/blog/2014/ ... lrealworld

Also JAE going from 1600 to 1866 or 1866 to 2133 can help in certain memory intensive programs. Even some games can get a boost...it is minimal but it is possible. EDIT: If you're doing more than just gaming and surfing the net or doing some critical work I would not do it......but if you are doing critical work I would imagine you're using a Zeon CPU of some kind with EEC/registered memory anyways.
Sure if you wanted 1866 instead of 1600 memory you should have bought it but when I build my Love of my life Sandy bridge 2600k rig named Freya My budget allowed for only ddr3 1600 and ddr3 1866 is actually the sweet spot on Sandies:)
Oh my this is the first time I mentioned the name of my female rig Freya I have been married to this goddess of love and war for over 4 years :) Too bad she is like Siri and only does what you make her do...never what you ask for or just be spontaneous :P
2600k@4848mhz @1.4v CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LG 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system
 
JustAnEngineer
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Re: Memory overclocking questions

Sat May 09, 2015 8:27 pm

For your Sandy Bridge CPU, I recommend DDR3 at 1.5 V.
$122 2x8 GiB PC3-14900 Crucial Ballistix Tactical BLT2KIT8G3D1869DT1TX0 (DDR3-1866, 9-9-9-27, 1.5 V)

For Broadwell, you need 1.35 V DDR3L. This memory also works well with Haswell and Ivy Bridge.
$112 or $120 2x8 GiB PC3-12800 Crucial Ballistix Tactical BLT2K8G3D1608ET3LX0 (DDR3-1600, 8-8-8-24, 1.35 V)
$131 2x8 GiB PC3-14900 Mushkin Enhanced Blackline 997072 (DDR3-1866, 11-11-11-27, 1.35 V)

For Haswell-E or Skylake, you need DDR4 at 1.2 V and another Ben Franklin.
$220 4x4 GiB PC4-22400 Corsair Vengeance LPX CMK16GX4M4A2800C16R (DDR4-2800, 16-18-18-36, 1.2 V)
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Chrispy_
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Re: Memory overclocking questions

Sun May 10, 2015 7:54 am

I have read several articles that prove memory speed has no real benefit for the vast majority of people. Faster RAM is usually of no gain because to reach higher clockspeeds it has to run at looser timings. OMGSuperL33tPower brand DDR3 running at 2400MHz probably runs at 11-12-12-36, and in real-word terms it's likely to be exactly the same speed as pedestrian 1866MHz at 9-9-9-24. AT did a thorough article on this, and whilst informative it's a snoozefest of marginal 0-2% results, which falls in the margin of error for most things. Faster RAM is pointless, unless you can keep the CAS latency the same. In almost all cases, you can't though - the RAM becomes unstable and causes crashes.

The exception to this rule is people using integrated graphics, but if you're so cheap you can't afford a dGPU, then you probably don't want to be buying 2400MHz DDR3 which costs 50% more than the standard stuff.

And lastly, like JAE says, Memory doesn't overclock well even if you (for some utterly nonsensical reason) decide you really want to overclock it. Best case scenario is you find an overclock that nets you less than 3% performance and doesn't corrupt your data and cause lockups.

(BTW, that corsair article is horrific, so many graphs that don't have zeroed axis, with cherry-picked tests, cherry-picked timings, and cherry-picked scenarios. It also compares DDR3-1600 using Haswell, which is designed to use DDR3-1866. The difference between very cheap 1866MHz RAM and very pricy 2133 or 2400MHz RAM is nowhere near as significant, even when looking only at their ridiculously contrived selection of cherry-picked tests)

To go back to my own experience, I have never, ever had any luck messing with RAM timings. 1866 CL9 is usually faster (and more stable) than 2400 CL12. When you're pushing a processor to the overclocking limit, why would you want to also stress the memory controller? You're likely to be heat and voltage limited already, and the controller could easily be the weak link that limits your overall overclock.
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JustAnEngineer
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Re: Memory overclocking questions

Sun May 10, 2015 8:47 am

It has been a long time since I saw enough benefit from RAM overclocking to bother with it.
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