What is cas for ram: Is CL the Lower the Better in Performance of Memory Module? Learn How to Easily Calculate the Latency Time of Memory Using Frequency and CL-TEAMGROUP

12 апреля, 2023

Is CL the Lower the Better in Performance of Memory Module? Learn How to Easily Calculate the Latency Time of Memory Using Frequency and CL-TEAMGROUP

When it comes to the performance of memory, the “read speed” and “latency” of the memory module come directly to mind. Generally, on the product specification table is actually the value of “frequency” and “timing”. This is known as conversion and does not directly mean that the two values are equal. If you ask me which value is more important, I would say~~ both! (Don’t roll your eyes at me, read on and you will understand why!)


 

  • Frequency: indicates the number of times the data can be transferred per second. Therefore, the larger the value, the higher the number of transfers per second, the more efficient the transfer.

  • Timing: represents the time taken by the memory module to transfer the data after receiving the command. The smaller the value, the shorter the time spent, and the faster the data can be transferred.

Therefore, the performance of memory cannot be determined by a single value, the frequency and timing are closely related. Timing is usually expressed as 4 values, such as CL40-40-40-80. The values represent, in order: CAS latency (CL), row address to column address delay (tRCD), row precharge time (tRP), row active time (tRAS). You only need to remember that the most common value we use is CAS latency, which is the commonly heard CL, and most other timing values will have more impact on professional overclockers. Today, let’s focus on the effect of CL and frequency on memory performance. I’ll explain more about the terminology when we have the chance next time.

1. What is CAS latency?

CL: Short for CAS latency, refers to how long the computer needs to wait before it can actually start reading data from memory. Therefore, for two memory modules with the same frequency, a higher CL means a longer delay time. It is worth noting that the unit of CL is not minutes or seconds, but represents clock cycles, which is a variable in the formula for calculating memory delay time. Taking the specification of T-FORCE DELTA RGB DDR5 as an example, the total number of clock cycles of DDR5-6000 CL38 is equal to 38. Are you running out of memory in your head after reading everything above? Don’t worry, I’ll show you how to figure out the latency of the memory module in seconds with a calculator by looking at the DRAM specification table!


 

2. How to calculate memory latency?

The unit of latency time is expressed in nanoseconds (ns), and the formula is as follows:


 

According to the above formula, we’ll give two examples to explain to you:

[Example 1]

At the same frequency, the effect of different CLs on the latency time.

Calculation based on the two specifications of T-FORCE DELTA RGB DDR5-6000 CL30 and T-FORCE DELTA RGB DDR5-6000 CL38

T-FORCE DELTA RGB DDR5-6000 CL30

Latency time (ns) = 30 x [1000 ÷ (6000 ÷ 2)] ≒ 9. 99 ns

T-FORCE DELTA RGB DDR5-6000 CL38

Latency time (ns) = 38 x [1000 ÷ (6000 ÷ 2)] ≒ 12.66 ns

When the memory frequency is the same, the lower the CL, the shorter the latency time will be, and the less time the computer has to wait to read the memory data, which means the better the performance.

[Example 2]

Under the same CL, the effect of different frequencies on the latency time.

Calculation based on the two specifications of T-FORCE DELTA RGB DDR5-5600 CL40 and T-FORCE DELTA RGB DDR5-6400 CL40

T-FORCE DELTA RGB DDR5-5600 CL40

Latency time (ns) = 40 x [1000 ÷ (5600 ÷ 2)] ≒ 14.29 ns

T-FORCE DELTA RGB DDR5-6400 CL40

Latency time (ns) = 40 x [1000 ÷ (6400 ÷ 2)] = 12.5 ns

When the memory CL is the same, the higher the frequency, the shorter the latency, and the shorter the time the computer has to wait to read the memory data, which means the better the performance.

※The latency time calculated by the above formula is a theoretical value※


 

3. Is CL the lower the better?

After the mind-twisting calculation, let’s return to the title of this article. Is CL the lower the better in performance of memory module? I think there’s no definitive answer! Like we said at the beginning, the performance of the memory is also affected by the frequency and timing, so the CL in the memory cannot be used to define the performance of memory alone.

 

4. How to pick a suitable memory?

When buying memory, you should consider factors such as capacity, frequency, CL, etc. The most important thing is the compatibility with the motherboard and CPU. I suggest you decide the size of memory and frequency first, and then choose the size of the CL. Usually, the price is higher if the performance of the memory module is better. Once you’ve decided on the memory specification, remember to make sure it’s compatible with your motherboard or CPU!

The compatibility of TEAMGROUP’s memory modules can be confirmed through TEAMGROUP’s Product Compatibility Inquiry page. If you have any questions about TEAMGROUP’s products, please leave a message below or visit TEAMGROUP’s Online Service page for inquiry!

 


 

If you like to choose and upgrade your own computer parts and enjoy the fun of installing them, but are not sure whether the specifications support the new 3A games, you can go to the Can You Run It website for reference. Enter the game you want to search in the “1)” search bar. Press “2)” Can You Run It? It will jump to the result page, and the result can be used as a reference for options or upgrades.


 

If you want to know if memory at different frequencies and capacities will affect the FPS of the game, I’ve put together links for you below, go check it out!

  • Does the Memory “Frequency” Affect the Game’s FPS? 3 Game Tested (Part 1)

https://www.teamgroupinc.com/en/blogs/ram-frequency-fps-I-en

  • Does the Memory “Frequency” Affect the Game’s FPS? 3 Game Tested (Part 2)

https://www. teamgroupinc.com/en/blogs/ram-frequency-fps-II-en

  • Does the Memory “Capacity” Affect the Game’s FPS? 4 Game Tested

https://www.teamgroupinc.com/en/blogs/ram-capacity-fps

What are Memory Timings & How they Work: CAS, RAS and tRAS Explained

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What the heck are memory timings anyway? RAM is already complicated enough: You have to deal with the memory speed, capacity, and whether or not it’s in dual or single-channel mode. All of these affect its performance in a number of different ways. But on top of all that, you have to contend with four more numbers, the memory timings (primary). If you’ve ever looked at a memory module, you’ll see an extra four numbers that look something like this: 8-8-8-24. Those are the memory timings.

Before we get to the memory timings themselves, let’s have a quick look at how RAM transfer speeds are calculated.

Memory or DDR transfer rates?

DDR4 RAM features a double data rate, meaning that 2 transfers take place per cycle. What else did you think “DDR” stood for? Let’s take standard DDR4-2133. The actual, nominal frequency of this memory is 1066 MHz, but effectively this amounts to 2133 million transfers per second (MT/s). Because they’re effectively the same, people also refer to DDR4 memory as running at 2133 MHz, since a DDR module at 1066 is the equivalent of a single-pumped module at 2133. RAM is connected to the CPU across a 64-bit bus.

What’s the Difference Between DDR4 vs LPDDR4 vs LPDDR4X: PC and Mobile RAM

So, in order to calculate the total transfer rate (which is expressed in bytes, not bits), you’ll need to multiply the effective speed (2133MHz) by the bus width. Then divide this by 8, since 1 byte is eight bits. For 2133 MHz DDR4, this translates into 17,064 MB/s of bandwidth, or approximately 17 GB/s. Now, if you’re running in dual channel mode, your CPU is connected over 2x 64-bit buses to the RAM, meaning that your effective bandwidth is approximately 34 GB/s.

What’s the Difference Between DDR4 vs GDDR5 vs GDDR6 Memory

Theoretically, this is all you’d need to know in order to determine RAM speed. In practice, there are other factors. This is where RAM timings come into the picture. Each of the four RAM timing numbers represents a different variable. Let’s start with the first:

tCL (CAS Latency):

This refers to the delay (latency) between your CPU requesting data from the RAM and the time that the RAM starts sending it. The lower the CAS latency, the less delay. The number refers to the number of clock cycles of delay introduced. For example, CL 9 means a delay of nine clock cycles between the CPU requesting data and the RAM starting the transfer.

tRCD (RAS to CAS Delay):

This has to do with the way that memory is stored in RAM–in a matrix made of logical rows and columns. The tRCD refers to the length of time between when the row for a piece of data is activated and its column is activated.

tRP (RAS Precharge):

RAS Precharge is functionally related to tRCD. Only one line in the data matrix can be activated at a time. tRP refers to the length of time between disabling access to one line and initiating access to another line. The Precharge command is issued once data is collected from a given row. It closes the row that was used and allows for a new one to be activated.

tRAS (al’Ghul):

Just kidding. tRAS is short for Active to Precharge delay. It refers to the length of time between instances of memory access.

How are Timings and RAM Speed connected?

If you’re familiar with the concept of buffering, it makes sense as to how RAM timings can have a notable impact on overall RAM performance. Each timing figure represents the time taken for actions taking place on the RAM module, something distinct from the transfer rate. Regardless of how high the RAM is clocked, your overall performance will be impacted by how fast data is stored and retrieved on the RAM module itself.

These two factors are interconnected, though. A higher clock-speed means a higher transfer rate, which in turn means that the CPU is fed data faster (and can, therefore, request it faster). In order to prevent a bottleneck, this means that memory timings need to increase as clock speed increases. Otherwise, delays on the RAM module will lead to the CPU sitting idle between instances of data access.

At first glance, it might not seem like a big delay: a CL 9 RAM module is only delaying transfer by 9 clock cycles, right? Well, yes. But this is happening every time that particular function (the CPU requesting data) takes place. Factor that in for all four timing aspects, and you’ll see that these delays stack up because they can take place thousands of times per second.

With lose enough timings, this can actually result in effective read-write rates that are actually slower than you’d get with a lower clock.

How do you Tweak RAM Timings?

First, identify the highest frequency your RAM will achieve with the default timing settings. Most BIOSes will compensate for higher-than-stock RAM speeds by loosening the RAM timings: if the timings stay low and your transfer rate increases, your RAM ends up with less breathing room and you end up with potential instability.

Timings can also be modified using Ryzen Master if you have an AMD CPU

Once you get your maximum nominal clock rate, start tweaking your RAM timings in small increments, of 1 cycle or so per time setting. What you’re aiming for is a combination of timings and clock speed similar to manufacturer-tweaked overclocked modules. Visit Newegg, check out the specs for a “target” overclocked module. Once you have your clock speed up as high as it goes (remember to up your RAM voltage accordingly. 1.35v is safe), start tweaking RAM timings downwards by single-cycle increments.

Make sure the timings are stable

To stability test your memory, use Memtest64. We suggest running 5 loops at a time. If you luck out, you’ll have overclocked memory with clock speeds and timings that approximate much faster factory OC’d modules. A life hack? Get yourself lower-clocked DDR4 from established names like Samsung. Even if the base price is a bit higher, these modules tend to have plenty of overclocking headroom on them. I run a pair of ADATA 2400 MHz modules and a pair of Samsung 2133 MHz modules in dual channel mode, with all four happily running at 3000 MHz.

Electric grill F3KBE (for 40 carcasses or 1 sheep/pig) Grill Master

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Electric grill F3KBE (for 40 carcasses or 1 sheep/pig) Grill Master

Manufacturer:
Grill Master

Product code: 3064
Brief characteristics:

Power, kW: 10.5
Voltage, V: 380
Dimensions, mm: 1320x685x760
Capacity: 40 pcs/1 ram

Shipping
Product certified
Manufacturer’s Warranty
Installation and maintenance

Description

Electric grill F3KBE (for 40 carcasses or 1 sheep/pig) Grill Master is a good offer for businesses and fast food outlets due to its technical characteristics and ease of operation. The technology of grilling is extremely simple — pre-prepared chickens are placed in cradles (baskets), after which the process of frying them begins. Thanks to the continuous rotation of the chicken carcasses directly next to the heating elements, their uniform roasting is ensured.

Electric grill F3KBE (for 40 carcasses or 1 sheep/pig) Grill Master allows you to fry up to 40 carcasses of chickens, or a whole ram / piglet at the same time.

Electric grill F3KBE (for 40 carcasses or 1 sheep/pig) Grill Master is reliable, simple and easy to use and maintain.

Technical features :

  • Cooking time for chicken carcasses, min: 80
  • Lamb cooking time, min: 150
  • Grill heating time to operating temperature, min: 25
  • Quantity of chicken baskets, pcs: 8
  • Number of chickens, pcs: 40
  • Number of skewers for ram, pig, piece: 1
  • All stainless steel
  • Drain cock in grill pan
  • Camera light
  • Glass doors
  • Glass back
  • Stainless Steel Chicken Baskets
  • Stainless steel lamb skewer 25

    All information about the goods posted on the site is for reference only and is not a public offer in accordance with paragraph 2 of Article 437 of the Civil Code of the Russian Federation.
    The manufacturer may change the technical characteristics, appearance and packaging of the goods without prior notice.
    Specify the necessary characteristics and the availability of the desired functions from managers before placing an order.

    Nikolai Baranov presented a report on the political parties of the Russian Federation at the Polish Academy of Sciences – North-Western Institute of Management RANEPA

    News of the NWIM RANEPA

    Nikolai Baranov presented a report on the political parties of the Russian Federation at the Polish Academy of Sciences

    February 24, 2021

    Science news

    On February 19, the Polish Academy of Sciences hosted a discussion on the ideological priorities of Russian political parties. One of the speakers was Nikolai Baranov, Professor of the Department of International Relations of the NWRIU RANEPA. His speech was devoted to the ideological priorities of the leading Russian political parties. nine0064

    Foreign experts met with enthusiasm the speech of their colleague from Russia, because the academic community of this country always watches the Russian agenda with special interest, regardless of the diplomatic relations between the two states.

    Nikolai Baranov stated that Russia is characterized by the development of transitional forms of liberal-conservative-socialist discourse, reflecting mass ideas about the Russia of the future through the prism of value priorities that have their own specific features due to the historical past. nine0003

    The professor also drew attention to the fact that after the failure of liberal reforms in the 90s of the last century, conservative ideas became the most popular ideological preferences for Russians at the beginning of the 21st century. It was about the third wave of Russian conservatism, for which the vital values ​​are equality, justice, characteristic of the socialist ideology in its classical sense.

    The conference ended with an active discussion. The participants, among other things, asked numerous questions to the Russian colleague, being interested in the peculiarities of the political parties of the Russian Federation. nine0003