We will also be running a few overclocking tests to ascertain the benefits of both improved bandwidth and improved latency towards DDR3 performance.
Bandwidth overclocking is a pretty straightforward affair to see how well DDR3 performance scale with speed increase. We initially wanted to benchmark at DDR timed at However, our HyperX modules could not be overclocked that high. In the end, we had to settle for DDR at Once we move towards MHz processors and higher speed DDR, memory latencies will increase even further, which counters potential performance improvements from the speed bump.
Check out the results below and see for yourself. At DDR, we found that the memory worked fine at 1. Then at DDR, we had to jack up the voltage again to 1.
Heat was not much of an issue till you pass the 1. As we had to overclock the whole system in order to benchmark different memory timings, the following table is a quick cross reference of actual frequencies and timings used in the benchmarks below. Under a synthetic benchmark, there was a visible performance improvement when overclocked up to MHz. In real world application benchmarks though, we were able to see improvements from DDR, but there wasn't much of a significant increase even after overclocking.
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Page 9 of Sponsored Links. Embrace your creative potential!When most people talk about RAM overclocking, they tend to think of increased data rates, which requires boosting the memory's operating frequency. This is a multiple of the base clock rate BCLK and memory multiplier.
How to overclock DDR3 RAM
Before we get into the details of this, we need to go over some memory-specific jargon, memory classifications, and what exactly each overclocking parameter represents. The number of cells determines the DRAM chip's total capacity.
But a capacitor does not stay charged for long; the charge leaks, and needs to be refreshed. This refresh cycle is what makes RAM dynamic. A memory controller integrated into the CPU in many modern systems reads the data, then writes it back. There is a bit of ambiguity when it comes to memory technology naming.
The final differentiator between RAM chips is the timing classification, which represents how many clock cycles of delay there are between certain events. So, if an imaginary chip that dispenses with architectural and basic physics limits had a timing classification ofit would mean that it is returning data and carrying out each type of internal task once per clock cycle. The take-away: aim for the lowest possible numbers in the timing classification.
Overall, each subsequent generation of RAM brings improvements, and in this case the improvement from DDR3 to DDR4 confers lower power consumption, lower latency, and a far greater range of frequencies. Many overclocked setups show voltages in the 1. Overclocked DDR4 kits reportedly use anywhere between 1. Having the same or higher data rate at lower voltages means less chance of permanent damage, lower cooling requirements, and more headroom for overclocking—all good things.
There are other core differences between DDR3 and DDR4, including maximum capacity, but these are peripheral for overclocking purposes. Single- versus multi-channel, when it comes to memory, is a CPU-side mode. The IMC can use multiple parallel channels to access the memory, theoretically doubling the bandwidth, though real-world gains are typically less than ideal. A memory rank is a lower-level grouping of individual memory chips on a single memory module—a data block that is 64 bits wide.
Single rank means that all the memory modules belong to one addressable block; dual rank means that the memory modules on a chip are divided into two groups.
Rank does not depend on the number of physical memory chips on a memory module. Single- versus double-sided RAM is a question of density.
Single-sided memory sticks have all of the memory ICs in a high-density configuration on only one side of the physical module, whereas double-sided RAM has the packages on both sides. The two types can be one- two- three- or four-rank.
Interleaving is the process of dividing data blocks such that multiple targets can be addressed contiguously.
Channel interleaving increases the potential read bandwidth of the system, and rank interleaving means one rank of memory can be addressed while another is being refreshed for multi-rank configurationsreducing the chip's overall latency.
Channel and rank interleaving parameters should be set to the highest possible supported by the motherboard to maximize memory performance. Each of these numbers stands for timing delay associated with an internal task type identified by one of the acronyms defined belowand the order of the numbers is always CL-tRCD-tRP-tRAS.Forums New posts Search forums.
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How to overclock your RAM
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Got two of these sets because of a deal last summer, or I would have went for the I tried it without upping the voltage and got a bsod while trying to boot into windows and didn't really have time to mess with it further. Was wondering if anyone tried to oc their ram to speeds, and did it successfully with what voltage? Also, what is the max safe voltage P. Where is cf Eclipse when you need him!
Joined Aug 29, Messages 3, I have this RAM It is 1. Ran Memtest overnight, no issues. It would not run at anything faster without changing the latency timings though, no matter what the voltage. I haven't gotten around to trying different latency timings yet to see if it can go faster. About the sweet spot, I would agree that the benchmarks I've seen over the net show this to be true at least the gains for anything faster are minimal at best, slightly detrimental at worst.
Maybe it's just in my head, but my PC felt slightly more snappy when I made this change. Microsoft also thinks going from to is good as your WEI will go up a few tenths of a point. Just my 2 cents.Log in or Sign up.
Hey guys - So i just built a new Ivy bridge rig yesterday and threw in 2x4gb ram from my now deceased Phenom II x6 build. The ram is Strontium DDRmhz, just nice and cheap bought about 6 months ago.
So i decided to see what the AIDA64 cache and mem scores would be for the ram running in Z77 chipset vs the g chipset and the scores obviously are amazing. Then I thought I would see how the ram overclocks - previously had it locked in at mhz with the Thuban - and locking in the voltage at 1. It just passed a nearly 9 hour Linx stress test MB without error How the hell is this possible?
No where on the net so far can I find anyone who has achieved such a ridiculous overclock on cheap ram like this - am I just lucky or is it commonplace with Ivy Bridge? Well, that are good news. I'm planing to build a similar setup as yours different mobo though. I have a OCZ gold which are complete crap. I'll try doing the same as you and see how it goes. Thank you. Edit: Just a note. The the first screenshot, it says that the memos are running at Mhz, right?
Our I am fcking blind? Last edited: Dec 6, MerolaCDec 6, Oh, yeah, sorry man. I forgot about that. You're doing really well. MuffloreDec 6, I have a concern. I have read all over the place that 1. Is this true? What is the safe limit? Because this ddr overclock is only stable at 1. No its fine. In the early days, I bought 1. Intel have since responded that 1. Could you or anyone else show me where I can find that information?
Pill MonsterDec 6, Yep just checked now, has Hynix written on the memory chips. Havent tried to tighten timings or increase frequency yet.On older systems or systems with quad-channel memory, it may not mean much, but under certain circumstances it can help tremendously. As I mentioned in the other overclocking guides, though, there are no guarantees. Memory especially tends to be screened pretty rigorously, with higher-performing chips being weeded out for faster modules. Finally, many of our modules come with XMP profiles, which allow you to dial in a safe factory overclock to get them running at their rated speeds.
With the voltage, you want to give yourself a healthy amount of headroom without risking damage to the memory or the processor. If your stock voltage is 1.
First, see if you can get your system to POST at the next memory speed grade while leaving everything else on Auto. If it does, fantastic! Generally lower timings are better for performance, while higher timings are often needed to hit higher overall speeds.
Whenever adjusting them, raise or lower by one step all but the RAS. When loosening timings, raise the RAS in about increments of 7, but when tightening, lower it only by 1 or 2 for each increment you reduce the other timings. The last thing you can play with to get that last ounce of bandwidth is your system BCLK, but note that many aspects of your system are tied to this clock. Many users may not bother with this step, with trying to speed up their memory, but every little bit can help.
Likewise, some overclockers are more enthusiastic than others, so we picked three voltage levels to represent the majority of builders: stock 1. Notice that even our "reasonably safe" 1. To keep things fair, we set all modules to loose timings for overclock tests. How far did we get? Wintec AMPX comes in second place overall, with the highest 1.[ RAM TIMINGS ] 1333 mhz UP TO 1600 mhz CORSAIR XMS3 DDR3 [ ASUS P6T DELUXE V2 ] LGA 1366 XEON X5650
Yet, OCZ wasn't the only company to have its high-end parts fall behind its own lower-rated parts, as Kingston's office-grade PC also beat its extreme-performance HyperX PC Now we can compare the performance of each kit's "rated timings" to that of its highest-speed CAS 9 settings. PC Mark 's memory bench leads the benchmark session. Did we really need benchmarks to prove the fastest modules had the best performance? Probably not, but they certainly drive the point home. Current page: Overclocking Results.
Page 2: Tomorrow's Bandwidth Page 3: Speed Vs. Overclocking Results Overclocking often requires increased voltage, but some modules are less tolerant of voltage increases than others. See all comments 6. Latency is measured in clock cycles, and two 6ns cycles occur in the same time as four 3ns cycles or eight 1. If you still have your doubts, do the math! How is it then, that DDR2 and DDR3 technologies are "better" and provide more bandwidth if they provide data in the same amount of time?
I do not know much about the technical details of how RAM works, and I have always had this question in mind. Is there a method to calculate the best setting without running hours of benchmarks? All SDRAM including DDR variants works more or less the same, they are divided in banks, banks are divided in rows, and rows contain the data as columns.Usually, when overclocking is brought up, the CPU gets most of the attention.
But if you're overclockingwhy should you stop there. You can also overclock the memory RAM and video card to achieve even better performance, so today, we're going to focus on overclocking the memory.
RAM can be overclocked in two ways: increasing the speed it's running at or lowering tightening its timings. We'll cover both methods in this guide, since you'll usually use a combination of them both to reach your maximum overclock. We're also going to touch on some the best ways to optimize your overclocked system once you know your maximum BCLK, processor, and memory speedso you'll be able to realize the highest levels of performance.
If you haven't overclocked your processor yet, we'd recommend that you do that first, and the guide we just mentioned will teach you everything you'll need to know to be able to do that. Before you get started, it's good to fully understand the basics of how everything works, so you'll know what you're doing. In this section, we'll go over what determines the RAM speed and how the memory timings work.
Overclocking 1333 to 1600
If you remember from the last guide, the base clock rate BCLK is used to determine the speed of many other components in the system, including the memory and CPU. So, to overclock your ram, we'll just need to increase BCLK or the memory multiplier. Your ram also uses a variety of timings to control how fast it operates, and it's important to understand these timings before overclocking your memory.
For this guide we're using the following ram: G. It's rated to run at MHz with timings of at only 1. This memory is excellent for overclocking because it only needs 1. It's also running at pretty tight timings, so that should also allow us to be able to overclock with lower latencies. And if you're interested, here's the rest of the hardware we're using to overclock our system:. Before we get started, it's probably a good idea to test the stability of the memory, so you'll know you aren't trying to overclock something that's already unstable.
Make sure you're able to complete at least one full pass without any errors. If you're getting errors at this point, make sure your memory is running at its correct timings and voltage as specified by your RAM manufacturer.
The method you'll need to use depends on your particular BIOS. If you overclocked your processor using a fixed multiplier, you could possibly lower your CPU multiplier and up your BCLK to achieve the same processor speed. This may also let you run your memory at a higher speed than you'd be able to otherwise.
However, if you're not in the situation mentioned above, you should probably save yourself the hassle and just overclock your memory up to your current BCLK.
However, if you're overclocking to your maximum BCLK, you'll need to lower your CPU multiplier, so it won't get overclocked any higher as we overclock the memory. So if your maximum overclocked CPU speed was 4.