How to overclock 2x4 DDR 3 1600 Mhz?

I will need your current latency settings for 1600mhz so i can help you take it to 1866mhz.

In your bios. You will also need a 200mhz oc to your cpu-nb and you will need to run a stability test.

Honestly im not hold your hand to do it man. You need to read about the bios and memory timing.

Are you lagging or have frame rate issues? because your setup at that res should have not be breaking a sweat for 60fps.

There would be a performance increase yes but you would still need a 200mhz oc to your cpu's memory bandwidth controller because your max supported ram is 1600mhz also your sticks you have now can most likely run 1866mhz fine.

Look in CPU-Z and let us know what yourare currently at, am guessing maybe 1333 - open CPU-Z and look at the memory tab - if you are running 1600 then it will show 800 in the frequency pane as this is DDR( Double data rate - so take true freq 800 x 2 = 1600 effective)...If it shows about 667 then you are at 1333, so go into the BIOS, the advanced area and look for XMP, enable it and select profile 1 and you'll be at 1600...and for the above 'suggestions' using the CPU/NB to OC DRAM is on AMD rigs - you have a Intel rig so it's not even applicable

I have built and overclocked several AMD fx gaming systems for people and have high understanding of memory latency and the performance tuning guide AMD offers but Intel for some reason does not.
Anyway, does a Intel cpu not have a memory bandwidth controller?
What benefit do you honestly get from having such high speed ram in your systems when your supported memory for optimal threaded support is 1600mhz?

I seen a game devs build that had 2 firepro cards and a 4770k at 4ghz and 16gb of 1866 ram. If that is enough ram for that core to process those cards than honestly your just reducing the life of the system and have higher cas for no reason.

You are running at at +/- 1600 now so you are good there, and 8GB is is good for gaming at this point in time gaming.

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AMD and Intel are worlds apart and have been for years as far as memory controllers go, with both groups of CPUs, Intel can generally use much higher freq DRAM and more of it, which improves overall system performance, the MC (memory controllers) in the FX CPUs are still the same basic MC they used back with the BullDozer line , which wasn't really much of an improvement over what the 965 Rev 3C CPUs used. They are still aimed at a two stick setup and even for the 8350 were tested (for published 'recommended' max amounts of DRAM using 4GB sticks)...1600 (for Haswell) is the recommended DRAM for the CPUs at stock, even though most can take 1866 with no problem and the upper end CPUs 2133, with a OC on the CPU, you can take them even higher.

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Sorry this makes no sense at all

It most certainly does make since, i am not taking a shot at your system man. If i am wrong about the intel memory cpu memory controller needing to be overclocked when you use more powerful ram than its max supported speed than i would be glad if you put him in the write direction, you just need some clear information about it is all.
When you use higher speed ram than the max supported you are pushing the memory controller beyond its intended usage thus you are reducing the life of the cpu just like every extra 100mhz to the cpu multiplier and every 2mhz to the fsb.
What is your memory latency? When you have such high speed ram it comes with higher cas and anyone who renders can tell you its better to have lower cas from a memory stick set such as 1866. When you have a set running at 2666 you have higher cas right from the factory.
My point is of course more powerful ram is exactly that but with such a kit its doubtful your cas is 9 or bellow. cas higher than 9 is negotiable whether its even worth it and it becomes a personal choice to use with some benefits but also drawbacks.

Is the memory controller OCed - Yes - the question is does it hurt it - No (unless done extremely poorly), as far as needing information about 'it', I'm quite happy with what I know and am happy to share it, as far as memory goes, I'm an Admin on the GSkill forums and have been helping people there for about 6 years, and I'm closing on a year here at Tom's and would conservatively say I've helped a few thousand people.

As far as 'pushing' the memory controller beyond the 'max' supported, you should know that specs on Intel on extremely underrated, which is done intentionally by Intel, and if you wish to talk about 'pushing' it beyond it's limits, take a look at at the FX CPUs you talk about, for instance did you know they have a MC that's truly native to 1333, check their BIOS and Kernal Programming Guide, or that they state the FX CPUs are capable of 1866 DRAM at 1 stick per channel (and that was with testing done with 4GB sticks (two sticks, 8GB total), or the reason they can run 1866 out of the box is that the CPUs themselves come pre-OCed.

Since you bring it up, how much work have you actually done with rendering? I have a number of clients that do do video as a large part of their work and numerous others that dabble in it....and here you are saying that 1866 will outperform 2666 I use, sorry but you are sadly mistaken....about the best 1866 sticks out there are CL8 (and the only ones I can think of offhand are the Tridents, RJ X and RJ Z all by GSkill and some Muskin sets), the majority are CL9 or 10....if looking at 1866/8 you can step stick up both CL and freq 1 step each for a slight performance gain or 2133/9 will be a little better than 1866/8, 2400/10 even better and 2666/11 even better, with each step up in CL the bandwidth of the sticks over comes the the higher CL performance wise, another good comparison is that 2666/11 sticks will generally downclock to at least 1866/8 and more often than not 1866/7....Have done quite a bit of testing with clients on this particular matter as far as rendering because many like you seem to believe in the old adage from DDR and DDR2 days that low CL is the key to performance, which today is a fallacy (and has been for about 5 or so years now), to look for the true 'Best' performance you have to look at a combination of freq/CL....neither by itself stands alone one needs to realistically look at a set of sticks and what it's capabilities are (and needless to say, of my clients that do rendering (after their own testing and look see's at what they get from various sets of sticks, none use less than 2133/9.

The capabilities of the Intels CPU/MC are also why all the pros I know of that are heavily involved in rendering, go with the i7 CPUs over AMD as the i7's are superior in rendering, OC better (comparatively) and can handle more and faster DRAM

My Tridents are 2666/11 (also OC easily to 2800/12, and I've run them at 1866/7) with all 32GB, if I cut back to 16GB can even run them faster.

Hope this helps

I know someone in the military that renders that got me into amd for budget gaming systems. He taught me how to clock the ram at different speeds and i know for his purposes I know 9 times out of 10 he prefers 2133 with a cas 9 and cas 8 if that set is a lucky one that will do it.
I was talking gaming really tho, it does seem that the gap is closing on the difference in needed system performance from a professional rendering system to a game system that can max settings at 120fps.
I will look up more in depth about overclocking the intel memory controller.
I want my next system to be intel with amd cards, how would a xeon do? or should i should i just go with the 4770k? What xeon would you recommend and can you oc them?

That will depend on what the system is used for and at what level...for strictly gaming something like a 4670K or a Xeon would be fine with 8 -16 GB of DRAM (here I'd go minimum of 1866/9 as games are increasingly utilizing DRAM more and even with games that don't it can add 2-5 FPS with the faster sticks. If for heavy rendering then fast DRAM and would go the 4770K over the Xeon, both for the Hyper threading and the OC ability....My son, both at work and in his other projects like for Scouts, he does quite a bit of rendering and with the ability to OC his 4770K it aids in the rendering process also