Buy the RAM with the highest frequency and the lowest CAS latency within your budget. By using this form you agree with the storage and handling of your data by this website. "Previously, the best CAS latency that memory kits at the DDR4-4000 level could achieve was at CL17. Each module kit has been tested to run at DDR3-1866 at a low latency timing of 10-11-10 at 1.5V. If you’re between two RAM kits with the same frequency but one has C16 and the other has C15, If you’re between two RAM kits with different frequencies and different, Overall, it is unlikely that you will notice the difference between. The new kits are DDR4-3600 CL14-15-15-35 and come in either 64GB or 32GB configurations. When talking about C16 and C15, we are referring to the first number in the string of numbers, which is the Column Access Strobe or CAS latency. This article is part of the Tom's Hardware Glossary. Tested on Intel and AMD platforms Supports XMP 2.0 profiles to assist with overclocking That means that if you are comparing two RAM modules with the same CAS latency, it is necessary to see which one has the higher frequency. Posts: 454 Joined: Thu Dec 30, 2004 5:50 am Location: Ottawa, Canada. RAM is set up on a grid with row and columns, and as it works, there may be small delays due to this setup. The CAS latency is the delay between the time at which the column address and the column address strobe signal are presented to the memory module and the time at which the corresponding data is made available by the memory module. Maybe 3733 MHz would be optimal For IF clock and timings like 14-15-15-35. Build Help. The same goes for two RAM modules with the same frequency and different CAS latencies. Latency is often misunderstood because on product flyers and spec comparisons, it's noted in terms of CAS latency (CL), which is only half the formula for calculating latency. There was a problem. We’ve assembled a guide to explain everything you’d want to know about CAS latency and how this impacts the debate on, We stated earlier that C15 RAM will perform operations exactly. This thread is archived. Posted by 3 years ago. The CAS latency ratings give an indication of the overall responsiveness of the RAM and lower numbers are better. HyperX Impact 16GB (2 x 8GB) DDR4 2666 RAM (Notebook Memory) CL15 XMP SODIMM (260-pin) HX426S15IB2K2/16. 2 Bronze ... (total 16 GB) with 2666mhz and CAS latency of 16 for 129 Canadian dollars. What Does CAS Latency Mean. The RAM module’s CAS (Column Address Strobe) latency is how many clock cycles the RAM takes for accessing the specific set of data in one of its columns and making the data available on its output pins. Generally speaking, a RAM kit with a CAS of 16 takes 16 RAM clock cycles to finish this task. ... March 15, 2020. So that means that some extremely high numbers such as 4266 MHz will not increase your performance, because your CPU can’t handle that much data. My ram is Corsair Vengeance LPX 2X8GB 3000 MHz CL15 and it is compatible … However, their CAS timings are different: CL16-18-18-38 (CAS 16) and CL14-14-14-34 (CAS 14), respectively. report. Build Help. 3200MHZ (CAS Latency 16) vs 3600MHZ (CAS Latency 19) G.SKILL Ripjaws V Series 16GB Business owners in need of a laptop should look for these features, Gigabyte Gaming Monitors Up to 22% off at Newegg, Best Tech and PC Hardware Deals 2021: CPUs, SSDs and More. A RAM kit with a CAS of 16 takes 16 RAM clock cycles to complete this task. RAM speeds can be anywhere from 1600 MHz, 2133 MHz, 3200MHz, or even to 4266 MHz. It’s important to note that two different RAM kits with the same data transfer rate, for example DDR4-3200, can have different CAS timings. Timing 15-15-15-35 CAS Latency 15 . Obihai OBi202 vs OBi302 VoIP Adapter: What’s the Difference? The second number is the Row Address to Column Address Delay or tRCD. Posted by 3 years ago. Well the “C” in C16 or C15 is short for CL, which itself is short for Column Access Strobe (CAS) latency. Each module kit has been tested to run at DDR3-1866 at a low latency timing of 10-11-10 at 1.5V. I've lowered the latencies a bit but I seem to be unable to change CAS to lower than 16. However, if you’re looking for optimal performance and are considering two RAM kits with the same frequencies. For those interested in overclocking, these numbers can also be raised in overclock settings, but exercise caution if considering that option. You will also want to think about what frequency your RAM has. Let’s start with the first: tCL (CAS Latency): DDR4-3200 , 16 CAS Latency vs DDR4-3600, 18 CAS Latency? 15 = CAS Latency 15 - CAS Latency; D = Ranks S – Single Rank; D – Dual Rank; Q – Quad Rank; O – Octal Rank; 8 = DRAM Type 4 - x4 DRAM ... KVR 16 R11 D4 / 8 Previous Part Schema: KVR 1600 D3 D4 R11 S / 8G. Hi guys! Latency / Dropout Issues. Once you reach a certain speed, your CPU simply can’t process that much data to make a difference. Well, the performance of your RAM is equally dependent on frequency and CAS latency, and you should consider both when buying a new RAM for your computer. New York, CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Intel XMP 2.0 Memory Kit Model CMK16GX4M2B3000C15. If you’re between two RAM kits with the same frequency but one has C16 and the other has C15, go with the C15. CAS Latency: 19 Voltage: 1.20V Multi-channel Kit: Dual Channel Kit Timing: 19-19-19-43 Model #: 8G 2666 RGB Knight Item #: 9SIASR8D3F6155 Return Policy: View Return Policy $52.18 – Example: if the speed rating of a standard module and a gaming module is the same (i.e. spiritwalker2222. In simpler terms, CAS latency refers to the number of clock cycles between when the CPU sends a request to the RAM and the RAM performs the operation or outputs the data. 9 comments. But the minimum CL of DDR4 is around 15, while DDR3 was good for 9-10 CL. © onecomputerguy.com all right reserved - - Since CL ratings only represent the number of clock cycles that a module must complete, they don't say anything about the length of each clock cycle, which means they aren't an accurate indicator of latency … 3000 (speed in MHz) / 15 (CAS latency) = 200 3200 (speed in MHz) / 16 (CAS latency) = 200. But what does CAS latency really mean? Our benchmarks show minimal performance penalties at 3200MHz – RAM latency simply doesn’t impact tasks like rendering in the same way as it does gaming – but this is still 3200MHz RAM with CAS latency of 16 and performs well enough for AMD to showcase their new top tier GPU’s using RAM of this specification. save. Retailers list timings as four numbers separated by dashes, like 16-18-18-38. It will be listed alongside the RAM with numbers presented in this format: Speed / CAS latency = value The higher the number you get for “value”, the better. Then simply multiply by CAS latency to get the actual "total completion time", which is the total time it takes to perform a memory access and get ready for the next one. CORSAIR Vengeance RGB Pro 32GB (2 x 16GB) 288-Pin DDR4 SDRAM DDR4 3600 (PC4 28800) Intel XMP 2.0 Desktop Memory Model CMW32GX4M2D3600C18. While a RAM’s data transfer rate tells you how many mega transfers (1,000,000 data transfers) the RAM can do in one second (a DDR4-3200 RAM can conduct 3,200 mega transfers in 1 second), its CAS latency is also important for understanding RAM performance. Is getting ram with a cas latency of 14 worth the extra cost? In practice, there are other factors. Latency is measured in cycles, cycle time is the inverse of frequency, so that both DDR4-3600 CAS 18 and DDR4-2800 CAS 14 have the same ten nanoseconds of real-time latency as DDR4-3200 CAS 16. We’ve assembled a guide to explain everything you’d want to know about CAS latency and how this impacts the debate on C16 vs C15 RAM. What do the other three numbers refer to? 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. Column Address Strobe (CAS) latency, or CL, is the delay in clock cycles between the READ command and the moment data is available. 1. The DDR4-3200 will perform faster because it has a higher frequency. Close. We stated earlier that C15 RAM will perform operations exactly one clock cycle faster than C16 RAM. Two different RAM kits with the speed or frequency can have very different performance if they have different CAS latencies. RAM Timings Table: https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing Join the conversation! In synchronous DRAM, the interval is specified in clock cycles.Because the latency is dependent upon a number of clock ticks instead of absolute … So, it seems obvious that the lower the latency, the better, right? In short, not really. Timing 16-18-18-38 CAS Latency 16 . With a CAS latency of 14, the Team Xtreem kit leads the way in low-latency RAM favored by gaming PCs, especially AMD Ryzen rigs. Timing 15-15-15-35 CAS Latency 15 . Vegeance RGB Pro SL vs Vegeance RGB Pro? The desired row must already be active; if it is not, additional time is required. CAS latency is a rating in clock cycles that indicates the time to response of a request to the RAM. Xfinity Wifi Keeps Disconnecting: What You Can Do To Fix It Now And Prevent It From Happening Again, Virtual Machine Gaming: What You Need To Know, DOS Attack Ack Scan: What To Do When Your Router Logs It & How To Prevent One In The Future, Alienware Fx Not Working: How To Fix Your Lights For Good, Acronis vs. Macrium: Best Backup Option Fits Your Needs Best. New Part Schema applicable to parts released after May 1, 2012. What does any of this have to do with CAS latency? You'll need 2666mhz RAM and the lower CAS latency the better (other timings are not as important as CAS latency). Take the Team Group Delta Tuf Gaming RGB DDR4-3200 and G.Skill Trident Z Royal DDR4-3200. 3400 (speed in MHz) / 16 (CAS latency) = 212. With a CAS latency of 14, the Team Xtreem kit leads the way in low-latency RAM favored by gaming PCs, especially AMD Ryzen rigs. Tom's Hardware is part of Future US Inc, an international media group and leading digital publisher. 16 CAS latency vs 18 CAS latency? Close. When looking at RAM, you’ll see a string of numbers referring to its timings which should look something like this: These later numbers are not particularly as important as the. Although one has a higher speed, its higher latency alters the performance to be equal to the level of a RAM chip with lower speed but higher frequency. Top . (3200Mhz, 16 CAS) If all are the same price, go for either the 3000 or 3200Mhz option. A RAM kit with a CAS latency of 16, for example, can be described as CAS 16 or CL16 or as having CAS 16 timings. New comments cannot be posted and votes cannot be cast. 32GB (4x8GB) Corsair DDR4 Vengeance LPX Black PC4-21300 (2666), Non-ECC Unbuffered, CAS 15-17-17-35, XMP 2.0, 1.2V 32GB £359.32 2666 15 32GB (4x8GB) Corsair DDR4 Vengeance LPX Red PC4-21300 (2666), Non-ECC Unbuffered, CAS 14-16-16-31, XMP 2.0, 1.2V 32GB £379.32 2666 14 Cheaper 16-16-16-36-2T or 16-18-18-38-2T RAM at that size and clock speed was available for between $164 -$194, depending on the model and timings. spiritwalker2222. In computing, it refers to the delay between the instruction to transfer data and the execution of that transfer. Gerbil XP. However, there comes a point where increasing the MHz will not affect your performance at all. While this is quite a small difference, to some it may be worth it! 9 comments. If you’re between two RAM kits with different frequencies and different CAS latencies and you want to get technical, there is an easy mathematical formula you can fill out to figure out precisely which one will be faster. RAM Timings Table: https://drive.google.com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing Join the conversation! However, if you’re looking for optimal performance and are considering two RAM kits with the same frequencies, go with C15 rather than C16. As the number increases, the shorter it takes to complete one cycle and therefore the more it can process. Jan 20, 2017 #5 Nenu [H]ardened. HyperX HX318C10FBK2/16 is a kit of two 1G x 64-bit (8GB) DDR3-1866 CL10 SDRAM (Synchronous DRAM) 2Rx8 memory modules, based on sixteen 512M x 8-bit DDR3 FBGA compo-nents per module. I just started fiddling with my RAM a bit, since I'm having trouble going over 2800 MHz on my Ryzen 7 1700. This thread is archived. Top . When talking about RAM, the CAS latency of the RAM refers to the amount of time for the RAM to access a specific data set in one of its columns and to make this data available after it has been told to do so by a memory controller. For example, a DDR4-3200 RAM can do 3,200 mega transfers (3,200,000,000) per second. The new kits are DDR4-3600 CL14-15-15-35 and come in either 64GB or … UE Boom 2 vs JBL Charge 2: Which Is The Better... Is Your Logitech G230 Mic Quiet? 14 vs 15 vs 16 cas latency on ryzen? The module is non-ECC, features a tested CAS latency of 15 and a power rating of 1.2V, and works on systems with a 260-pin SO-DIMM slot and a DDR4-enabled chip. What’s the Difference Between DDR4 vs GDDR5 vs GDDR6 Memory. CAS Latency: 18 Voltage: 1.35V Timing: 18-22-22-42 Recommend Use: Intel 300 Series / Intel 400 Series / AMD & Intel Compatible / AMD 300 Series / AMD 400 Series / AMD 500 Series / AMD TRX40 Model #: … When looking at RAM, you’ll see a string of numbers referring to its timings which should look something like this: CL16-18-18-38 or CL15-15-15-35. CL16 vs. CL19), then the lower CAS latency will provide better performance; The difference between the perception of latency and the truth of latency comes down to how latency is defined and measured. I can say your not alone, i got mine stuck so it would not go lower than 16 even though it saved my 15 input , i cleared cmos and reloaded a stable profile in bios , and disable Xmp , manually set the frequency and first five to six timings , set enough ram volts and if you can ,set ram initialisation volt the same ,that got mine right, booted too but i had crashes i blamed it … Additional timing parameters are shown in hide. In other words, the lower the CAS latency is, the less RAM is required. Each of the latter 3 numbers in the string of RAM timings refers to some aspect of RAM’s row and column setup. Kingston HX424S14IBK2/16, 16GB 2400MHZ DDR4 CL14 SODIMM (KIT OF 2) Hyperx Impact $226 would provide the best cpu performance but its half as much ram if you had another use for the system outside of gaming … Team Group Delta Tuf Gaming RGB DDR4-3200, PC Memory 101: Understanding Frequency and Timings, What Is a FALD Backlight?