Ram speed vs latency


If you're putting together a gaming PC build how much attention and money should you pay towards dropping a chunk of high speed RAM into your rig?

On paper, faster memory is desirable, but is it really necessary and worth the expense? AMD and Intel architectures and topology are fundamentally different. The topology in particular has a measurable impact on RAM performance and the resulting bandwidth and latency.

Others hardly see any benefit at different RAM speeds. Intel clearly has the advantage here. They represent a driving game, a third person shooter, a first person shooter and a strategy game.

This covers a good chunk of use cases. If you shift to p at maximum settings, you are presented with more of a graphics bottleneck, and at 4K at maximum settings, even an RTX Ti can and does struggle to put out playable frame rates in some titles.

At 4K the system is clearly bottle necked by the GPU. At p we start to get a clearer picture. F1 shows that faster RAM has a large impact on performance. Metro Exodus is a very graphically demanding game but even here we see benefits at lower settings. The overall story is clear. Kits faster than this tend to really jump up in price. At p though the results with the slowest RAM are interesting.

The memory clock and Infinity Fabric clock are tied to each other in a ratio up to a speed of 3,MHz.

What Does CAS Latency Mean

Well, actually it's 3,MHz if you really want to push it as far as you can go. If you move beyond this, the motherboard will automatically set the Infinity Fabric clock toor half the memory speed. The Infinity Fabric can be set higher than 1,MHz. For a similar price, you can probably get a 32 GB 3,MHz kit. Instead divert it towards a better GPU. For us 3,MHz memory with the common timings of should be considered the baseline for all but budget systems. Such RAM will also be widely compatible and easy to set and forget.

Chris' gaming experiences go back to the mid-nineties when he conned his parents into buying an 'educational PC' that was conveniently overpowered to play Doom and Tie Fighter. He developed a love of extreme overclocking that destroyed his savings despite the cheaper hardware on offer via his job at a PC store.

Chris still puts far too many hours into Borderlands 3, always striving to become a more efficient killer. Image 1 of 4. Image 2 of 4. Image 3 of 4.RAM is a critical component of a PC. So, when it comes to installing the correct RAM in your computer, many factors are needed to be considered. We are all aware that RAM with more gigs of memory and higher speeds in terms of MHz performs better. The CAS Latency is defined as the total number of clock cycles it takes from when the memory controller receives an instruction for retrieving data to the time a RAM module accesses the specific data from a particular column address and makes it available at one of its output pins.

Generally, when comparing RAM from similar generations e. A RAM module is responsible for receiving a command for data retrieval and then making that data available on its output pins. The process of data retrieval begins from the CPU which sends the command to the memory controller and then the memory controller sends the command to the RAM.

Upon receiving the command, the RAM module gets to retrieving the data and sending it to its output pins. Glasair wingtip extensions these retrievals, for each data that is retrieved the RAM module goes through certain cycles.

This means that the fewer cycles a RAM has to go through, the faster the data would be retrieved making your computer more efficient. The number of lines here will represent the gigs of memory that a RAM has. The speed or frequency with which the lines are moving forward represents the clock speed of the RAM. The cashier scanning your grocery items, processing your payment, and giving you the receipt is considered as once cycle.

If the cashier is slow or encounters any delays, that would mean higher latency as it takes more time to complete the cycle. On the other hand, if the cashier is fast and efficient that would mean lower latency as it takes less time to complete the cycle. While DDR3 had a minimum CL of 9, DDR4 performs significantly better with minimum CL of 14, simply because of the superior clock speeds that substantially impacted the latency in seconds. Lower latency in seconds can show massive changes when switching generations.

Still, the difference might not be significant in the same generation as the CL tends to increase with a small frequency increment. Games typically show a slight increase fps in performance. Where CL really matters is in configuring RAM from different manufacturers to run in dual or quad-channel configurations for more significant performance improvements.

To get the best performance while saving money, we would recommend before making a buying decision:. The clock speed of the RAM could be seen from the task manager in Windows. You can also utilize this RAM latency calculator. They are pretty much the inverse of each other. If you are looking forward to installing two RAM modules in your computer then they need to be of the same double data rate and have the same clock speed, and most importantly they need pelet lewat baju have the same CAS Latency.

The motherboards are programmed to work with the higher CAS Latency. Our goal is to help people learn and sharpen their knowledge pertaining to technology. We cover everything tech-related including computers, consoles, phones, smart homes, and much more.

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By Theo Thomas. January 29, Latest Articles. More Articles Like This. Editor Picks. Recent Articles. Popular Categories. About Us.Around these parts, we encourage you to upgrade your existing computer rather than buy a new one.

It's easier on your wallet and helps cut down on the amount of e-waste. But as is often the case, saving money can require a bit of knowledge. That question isn't as straightforward as it seems. You need to be sure you have enough RAM to meet your general requirements. In short, think of RAM as short-term memory that your computer processor uses to store files it needs to access quickly and often.

Utilizing this space allows your machine to respond instantly, rather than taking several seconds. This may not sound like much, but it's often a wait of only a few seconds that makes a PC feel old and underpowered.

When your computer is struggling to open the programs you wish to run, you probably need more RAM. This general storage area has plenty of space, but its speeds are much slower. You may have low RAM if you're using an older PC that came with enough memory several years ago but no longer meets the demands of today. You're also likely to run out of RAM if you buy a cheaper laptop that doesn't come with all that much.

These devices tend to be fast initially, but as software changes and programs use more memory, there isn't any room for future growth. Increasing the size of your RAM reduces the likelihood of needing to use your hard drive for these temporary files.

But once you have enough to meet your needsyou reach a point where adding more may not be the best way to get the speed improvements you're looking for. There are a couple of metrics that determine your RAM's speed.

Frequency affects maximum bandwidth, which is how much data can travel to and from your memory stick at a time. Latency affects how quickly RAM can respond to a request. Frequency is measured in megahertz MHz and you want a bigger number. Latency appears as a series of numbers such as and you want these to be lower.

Once your capacity needs are met, increasing frequency and reducing latency may yield you a more noticeable result than packing in more RAM. As for how much of a difference you will notice, well, that depends. Having buckets of RAM is useful if you're into professional video or audio editing. Yet even then, 8 to 16GB of RAM should be enough to handle running several professional applications simultaneously. You likely won't need to think about upgrading for several years, if that.

If you're a gamer, you may get some benefits from having 16GB, but 8GB can handle most games. Making the leap up to 32GB is currently unnecessary. At that point, you may be better off getting faster sticks.Getting RAM with higher clock speeds may not always translate to better gaming performance - it could even make things worse. For gamers, speed is of the essence. Even slight jumps in FPS performance can bring them, if nothing else, bragging rights about how awesome their PC build is.

However, when it comes to RAM performance, does clock speed really make a difference? How fast your RAM performs depends on a number of factors that includes, but is not limited to, the clock speed of your RAM. These factors include, along with the frequency, also the bandwidth available, quantity, dual data rate DDRthe total number of channels, latency, and also the generation and speed of your processor.

The frequency of the RAM essentially denotes the number of commands it can handle per second. In the good old days of single core CPUs, it would directly translate to being the only metric that would tell you how fast your CPU is. For instance, a MHz clock speed would mean a CPU can process up to two hundred million commands per second.

As we stated earlier, getting better performance, even a few extra frames per second matters a lot to gamers.

So with that objective in mind, does getting system RAM with a higher clock frequency really help? Over the last few years, a number of tests have shown that with all other equipment remaining the same, just switching RAM from a lower to higher frequency variant has made no difference in gaming performance.

Check out this chart below:. Source: PC Steps. Source: Tech Buyers Guru. On the other hand, there might be actual downsides to getting a higher frequency on your system RAM. For starters, these frequencies are often achieved by overclocking, which could lead to instability related RAM crashes. There are cases were systems with integrated graphics hardware have benefited from using RAMs with greater clock cycles - most notably, the Ryzen systems from AMD.

Interestingly, RAM with lower clock frequency as lower latency. So technically, they seem to be faster, right? This is where we would like to remind you what the clock speed stands for. As a result, it would have a clock cycle of 5 nanoseconds. Hence, a CAS latency of 5 on both would have a difference of almost 22 nanoseconds! Even without going into all these complicated calculations, a simple way to get an idea about actual RAM performance is to divide the clock speed with the CAS latency.

Comparing the resultant number for different clock speed-latency combinations will give you an accurate picture of how much faster different RAM modules actually are in day to day usage. Email Arnab Mukherjee. Follow Us. Digit caters to the largest community of tech buyers, users and enthusiasts in India. The all new Digit in continues the legacy of Thinkdigit.The speed of the memory will determine the rate at which the CPU can process data. The higher the clock rating on the memory, the faster the system is able to read and write information from the memory.

All memory is rated at a specific clock cloudflare real ip in megahertz that matches the CPU's memory interface speed. Newer memory-classifying methods now refer to them based on the theoretical data bandwidth that the memory supports. All the versions of DDR memory are referred to by the clock rating but, more frequently, memory manufacturers are starting to refer to the bandwidth of the memory.

These memory types can be listed in two ways. The first method lists the memory by its overall clock speed and the version of DDR that is used. The other method of classifying the modules is by their bandwidth rating in megabytes per second.

Here is a short conversion of some of the standard DDR memory that can be found:. It's important to know the maximum speed of memory that your processor can support. You can still use MHz rated memory with the processor but the motherboard and CPU will adjust the speeds down to effectively run at MHz.

The result is the memory is run at less than its full potential bandwidth. As a result, you want to buy memory that best matches your computer's capabilities. For memory, there is another factor that impacts performance — latency. This value measures the amount of time or clock cycles it takes the memory to respond to a command request. With each generation of memory, the number of cycles for command processing increases. For instance, DDR3 generally runs between seven and 10 cycles.

Newer DDR4 tends to run at nearly twice that with latency running between 12 and Even though there is higher latency with the newer memory, other factors such as higher clock speeds and improved technologies generally do not make them slower. The lower the latency, the faster the memory is to respond to commands. Thus, memory with a latency of 12 will be better than a similar speed and generation memory with a latency of The problem is that most consumers will not really notice any benefit from the lower latency.

In fact, faster clock speed memory with slightly higher latency may be a bit slower to respond but offer a greater amount of memory bandwidth, which can offer better performance. By Mark Kyrnin Mark Kyrnin. Mark Kyrnin is a former Lifewire writer and computer networking and internet expert who also specializes in computer hardware.

Tweet Share Email. Was this page helpful? Thanks for letting us know! Email Address Sign up There was an error. Please try again. You're in! Thanks for signing up. There was an error. Tell us why! More from Lifewire. What Is Overclocking?Some enthusiasts take the opposite route. They get expensive ultra-high-frequency or low-latency memory, hoping it will give them a big performance boost. Most major memory manufacturers now offer special low-latency memory.

Crucial offers a high-performance line called Ballistix. You can pay from 30 to percent more for these low-latency offerings, but are they worth the extra money? We examine the effects of low-latency memory on two high-end systems to determine its value to PC builders. Low latency memory, running at low latency settings, supposedly speeds up your system without requiring you to overclock it.

Memory latency is almost always designated in one of two ways. This is actually the last stage in finding where data is physically located in RAM.

CAS is the amount of time, in cycles, between receiving the column access command and acting upon it. It is usually a value of 2, 2. This is the delay, in number of cycles, between finding the row of a location in memory, and finding the column. Sequential bits of data are usually stored along the same row in memory, so rows are not re-selected nearly as often as columns. RAS precharge. This is how much time it takes for the memory to stop accessing one row and start accessing another.

Like tRCD, this value is typically between 3 and 5 cycles for modern memory systems. It can have an impact on performance when programs use large blocks of memory that span several rows. Active to Precharge Delay. This is the delay, in cycles, between the pins of the memory module electronically receiving a signal and the module starting the Row Access Strobe to locate and retrieve or write it. This is generally a pretty big delay, from 5 to 8 cycles on most DDR memories. The first latency measurement that comes into play is tRAS, as the memory waits to activate the row where the data resides.Hey all and welcome towards an article, not so much a review.

The impact of memory timings and frequency on AMD Ryzen systems in games has been a topic of discussion. In this article, we'll zoom in on specifically that. So that's a dynamic shift overall. DDR4 memory has been a topic of discussion ever since the first generation Ryzen processors have been released. The effect of faster low latency timed DDR4 memory has been there and very visual, much more so compared to Intel. In this article, we are going to zoom in a little and try to show what exactly the sweet spot is for Ryzen processors in regards to memory and latency with gaming in mind.

First stop, we need to look into the topology of AMDs memory controllers relative to their location on the processor package. Any Matisse CPU is comprised of two or optionally three dies, aka 'chiplet' dies that between them cover to make the processor. Inside that cIOD, the memory controller is located. Officially Matisse based processors support memory speeds up to MHz but can run kits up to MHz without a problem.

With AMD Ryzen systems, you need to remember that the memory clock, memory controller clock, and Infinity Fabric clock run at a ratio; e. The Infinity Fabric frequency can either be synchronized to the memory clock or unlinked from it, using various dividers and multipliers. With memory speeds greater than MHz a memory clock greater than MHzthe memory controller clock keeps MHz, however the Infinity Fabric link changes to a ratio state.

According to AMD:. An unstable configuration usually results in application or system crashes, but it can also lead to file corruption even without any crashes, making your operating system installation unusable and leading to gradual data loss.

You can always find the latest version of this useful program in our download section. The current revision is 1. The developer of this tool 1usmus is active on our forums, and you can find him and more info here. DRAM Calculator lets you check which memory timing settings will be safe and fast. We always advise starting with a safe setting. One of the factors in successful OC can also be the temperature, so, if possible, try to keep it as low as you can in your system.

An intake fan or two at the front can really cool the area where your RAM is located. A top-blowing cooler on the CPU can surely help, too. Other than that, you can always use a dedicated fan to cool your memory. While there are no guarantees with overclocking because many factors can influence the outcome motherboard, the revision of RAM, etcyou can safely assume that the best results can be achieved using memory chips based on:.

Insights into DDR5 Sub-timings and Latencies

Also, the lower the default CAS latency setting used by the manufacturer e. The next thing is a dedicated section showing the performance difference when using and MHz with CL with a Inifinity Fabric divider. Prime95 download version Nvidia shows signs These puppies come with integrat This is the processor that is on the watchlist of many with 8 cores and 16 threads if offers a bit more flexibility Overall, this processor series is to bring extensive single and multi-thread workload performance gains.

Released by AMD as a new architecture that will once again attack Intel, this round with a heavy focus on your gaming performance. Overall, this pro When deciding between RAM of different clock speeds. weika.eu › /11 › choosing-ram-cas-true-latency. Memory (DRAM) performance is all about the relationship between speed and latency.

While the two are closely related, they're not connected in the way you. The number of cycles a memory takes to find data and send it to CPU at blazing fast speeds is latency. It is happening so fast, you can barely. CAS latencies are an inaccurate indicator of performance · True latency is best measured in nanoseconds · As speeds increase, true latencies decrease and/or.

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about the post title. Wouldn't you buy the faster clock speed DIMM, unless you are trying to save money? Two questions for RAM: Is it better to go with speeds with higher latency/looser timings, or speeds with better latency/tighter timings?

I'm looking to build a new higher end pc and I want to understand RAM specs better. What is the differences that I'd see between two types. CAS latency · Column Address Strobe (CAS) latency, or CL, is the delay in clock cycles between the READ command and the moment data is available. · Dynamic RAM is. higher rated CAS timings do not necessarily translate to higher latencies when running at the higher clock speeds. So getting the higher speed. Latency is how long it takes for the request to be processed by the RAM controller and internal circuitry, “speed” is how rapidly the bytes can be returned once.

On the other hand, frequency of RAM affects both bandwidth and latency (because timings are measured in cycles, and frequency decides how long. CAS Latency. Column Access Strobe (CAS) latency, or CL, is the delay time of your RAM receiving a command and then being able to issue it.

How do you decide which is more important, speed vs latency? Crucial 32 gig ram that is mhz (slow) but latency timing 16 (fast) OR. Memory technology has also improved in cycle and bus speed, along with overall size to the processor than that contained in RAM or peripheral storage. Remember that more bandwidth is better, and more latency is worse. How to Choose the Right RAM for Your Desktop or Laptop PC in Best RAM · 16GB (2 x 8GB) | Memory Type: Pin DDR4 SDRAM | Memory Speed: 3,MHz | CAS Latency: 18 | Timings: | Height: 44mm/" · 16GB (2.

SDRAM Vs SRAM. Do not confuse SD-RAM with SRAM, which stands for Static RAM. Static RAM is mostly used in CPU cache memory & It is much. What is more important ram speed or latency?

mhz with latency or mhz with latency 9? CPU Intel i7 [email protected] Ghz RAM. This is a RAM latency calculator. It takes the data rate (MHz) and cas latency (CL), then calculates the absolute latency for memory accesses in nanoseconds.