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Corfu Craxr RGB memory evaluation： high-frequency e-sports memory bar, ring RGB light bar design

2026年7月5日 | admin | C3

KLEVV Kefu, I believe that friends who often watch LOL competitions should be familiar with this brand. It is not only the official sponsor of the 2021 LCK, but also the sponsor of the T1 team where the big devil Faker is located for many years; Referring to science and taxmemoryA product, we have previously evaluated Kefu’s BOLT XR memory, and its Hynix DJR particle overclocking potential is huge and impressive.

　　For some players who pursue the value of the chassis, the memory should not only have strong performance, but also look good. Therefore, Kefu introduced Craxr RGB memory, which provides a new choice for players who like to play with lights and pursue memory performance.

　　Today, this Corfu Craxr RGB memory came to PConline evaluation room, so how did it perform? Let’s take a look at it next.

　　We received two 8GB versions of Craxr RGB memory sticks, with the frequency of DDR4-4000 and the memory sequence of CL19. In addition, there are versions of DDR4-3600 CL18 and DDR4-4266 CL19, and the capacity can be selected from a single 8GB/16GB and 16GB/32GB set, so the frequency and capacity options are relatively rich.

　　The packaging box is designed in dark black, and the colorful RGB logo and light bar effect diagram on the front highlight the gorgeous RGB lighting effect of the product. The logo of lifetime warranty is in the lower left corner, and the capacity and frequency of the product are indicated in the upper right corner.

　　On the back of the product, the characteristics of the memory are introduced: firstly, the memory is manufactured by strict technology, and secondly, it supports the RGB synchronous lighting effects of many mainstream manufacturers, including Razer, Asus, Gigabyte, MSI and Huaqing. You can set the overall RGB lighting effect synchronization through the lighting effect software of these manufacturers.

　　In addition, the back is also marked withIntel XMP andAMDThe logo of indicates that this memory is compatible with Intel and AMD platforms.

　　As soon as the memory is in hand, you can see that the work of the vest is still relatively good. The vest body is made of aluminum with good thermal conductivity, and the rich color matching adds a touch of exquisite feeling to the appearance of this memory stick.

　　Above the memory is a circle of RGB light guide bars, and on the right there is the model identification of the memory. The light guide bars are designed in a corner-free ring shape, so you can easily see the lighting effect of RGB whether you look up or down.

　　Below the light guide bar is a decorative bar with bright design, with the Logo and model of Kefu on it, which makes the exterior look more quality.

　　At the same time, the vest is frosted, so it is not easy to produce fingerprints when fingers touch the vest. The vest also has many concave dots, on the one hand, for decoration, on the other hand, it can increase the heat dissipation area of the vest to a certain extent and improve the heat dissipation efficiency.

　　The memory stick also has a small label printed with the model of the memory stick, the frequency of DDR4-4000, the operating voltage of 1.4V and the origin of Korea.

　　Compared with BOLT XR, the face value of CRAS XR RGB is indeed better.

　　Next, let’s enjoy the brilliant annular RGB lighting effect, but it would be better if the lighting effect could be softer.

　　Previously, the performance of DDR5 memory was tested on the 12th generation Core, because there was no Z690 with DDR4 slot in the evaluation room.mainboardSo we just recently received the ASUS ROG Z690-A GAMING WIFI D4 snow blowing motherboard, so this time we will use the 12th generation Core platform to test the performance of this memory.

　　Through the memory SPD reading tool in ASUS BIOS, we can read the relevant information of the memory. We can see that the read memory granule manufacturer is from Hynix, which supports XMP2.0. The basic frequency of JEDEC is DDR4-2666, and it has an XMP gear with the frequency DDR4-4000 CL19.

　　Judging from the information read in HWiNFO64, DDR4-4000 frequency has been successfully identified, and the time sequence is CL19, and two channels have been formed.

　　In the typhoon software, we can see that the CRAS XR RGB memory particles in our hands are from Hynix, and from Part Number, we can see that the memory uses DJR particles.

　　First of all, let’s test the performance at JEDEC standard frequency, which is DDR4-2666 frequency. this momentCPUMemory frequency division is set to 1:1, and memory frequency division is not enabled.

　　Using the cache and memory benchmark in AIDA64 to test the memory efficiency, we can see that the Craxr RGB memory has a memory reading speed of 42,194 MB/s, a memory writing speed of 38,584 MB/s, a memory copying speed of 41,000 MB/s and a memory delay speed of 74.6ns at the JEDEC reference frequency.

　　Next, we use 3DMARK’s CPU PROFILE test to see the benchmark performance of CPU. From the results, the memory frequency has little effect on the running score of CPU PROFILE.

　　We also ran two benchmark of high frame rate racing games at DDR4-2666 frequency, F1:2020 and Extreme Racing: Horizon 4 (don’t ask why it’s not Horizon 5, because the Microsoft server can’t connect).

　　Under F1:2020, the average frame rate is 321, the lowest frame rate is 246 and the highest frame rate is 390. In Extreme Racing: Horizon 4, the average frame rate of CPU simulation is 301, the lowest frame rate is 244.7, and the highest frame rate is 360.6.

　　Next, enable XMP to configure overclocking. After the BIOS sets the frequency of XMP, BCLK and the frequency division ratio of the memory controller, you can start it safely.

　　Continue to use the cache and memory benchmark in AIDA64 to test the memory efficiency. We can see that Craxr RGB memory is provided. After XMP is enabled, the memory reading speed is 62055MB/s, the memory writing speed is 57805MB/s, the memory copying speed is 57465MB/s, and the memory delay speed is 78.3ns. The speed of memory reading and writing is increased by nearly 48%, and the speed of copying is increased by nearly 40%, at the cost of 4% delay.

　　In the benchmark of F1: 2020, the average frame rate is 341, the lowest frame rate is 265 and the highest frame rate is 423. Compared with the reference frequency frame number, it is 20 frames, 19 frames and 33 frames higher.

　　In "Extreme Racing: Horizon 4", the average frame rate of CPU simulation is 341.6, the lowest frame rate is 292, and the highest frame rate is 402.5, and the number of frames is also greatly increased.

　　For DJR granular memory with excellent overclocking potential, it is naturally not easy to end the test like this.

　　After adjusting the parameters, the overclocking of CRAS XR RGB memory was finally stabilized at DDR4-4800, and the time sequence was CL19 25-25-45-70, which passed the test of RunMemtestPro memory load software.

　　Now that we have passed the test, we will test the performance by AIDA64 software. We can see that Craxr RGB memory is overclocked to DDR4-4800, and the memory reading speed is 75,199 MB/s, the memory writing speed is 70,310 MB/s, the memory copying speed is 65,199 MB/s, and the memory delay speed is 68.3ns, which is more obvious than DDR4-4000. The memory reading speed is increased by nearly 22%, the writing speed is increased by nearly 22%, the copying speed is increased by nearly 13%, and the delay is reduced by 10ns. Here, we can see the strong overclocking potential of DJR particles, which brings excellent memory performance.

　　In "Extreme Racing: Horizon 4", the average frame rate simulated by CPU is 375.8, the lowest frame rate is 319, and the highest frame rate is 441.3. The number of frames is higher than that after opening XMP. Thanks to the powerful memory performance, especially the improvement of the minimum frame rate, the game’s image quality fluctuation can be reduced greatly, and the experience is more stable.

　　Kefu CRAS XR RGB memory uses Hynix DJR particles, plus DDR4-4000 high frequency, which brings excellent memory performance and can bring a higher level of performance to the overall performance and game experience of the computer. At the same time, the starting voltage of particle 1.4V and good overclocking potential lay a solid foundation for it to surpass DDR4-4800. With the strong memory performance, the frame number is more stable when experiencing high frame rate games.

　　Secondly, its metal heat dissipation vest can bring efficient and stable heat dissipation performance. The existence of corner-free annular RGB light guide bars adds icing on the cake to the face value of Kefu CRAS XR RGB memory. It also has good compatibility and supports a variety of mainstream lighting effects. It is a high-performance e-sports memory chip that gamers deserve to choose.

Reporting/feedback

How to improve heart rate variability HRV and live healthier and healthier？

2025年9月15日 | admin | D4

What can HRV monitoring of heart rate variability bring to heart patients? ",we already know that higher HRV means better compression resistance and cardiovascular function.

HRV is an index that can reflect the general health. Usually, we hope that the higher the HRV, the better.

So, what can we do to improve HRV?

1. Increase your exercise frequency.

It is a great way to increase the training intensity appropriately, but people often underestimate the importance of training frequency.

Speaking of increasing HRV, one of the easiest ways is to increase the frequency of your training.

Especially when your average HRV value is always low, you can try to reduce the intensity of training, increase the weekly exercise frequency, and keep yourself training at least 5 times a week.

2. Improve your aerobic cardio-pulmonary endurance

Your HRV is directly related to aerobic health indicators such as VO2 max and anaerobic threshold.

This is because the more mitochondria you have, the better their functions, and the higher your HRV, which is why endurance athletes usually have higher HRV.　

You may not have any idea of becoming an endurance athlete, but there is no doubt that the fastest way to improve HRV is to improve your cardiopulmonary endurance.

If your original lifestyle is sedentary for a long time, I suggest that you don’t exercise too hard in the first two months when you just start exercising.

You can monitor your heart rate during exercise and HRV at rest with the Good Friend ECG Machine (out-of-hospital management version) and the Good Friend Online APP PRO version to ensure that your heart rate during exercise can reach 55-70% of the maximum heart rate without overtraining or insufficient recovery time.

You can do a little exercise every day and gradually increase the exercise time. At first, you only need to train for 15 minutes every day, and make sure that you can complete the training to reach your target heart rate five times a week.

When you make significant progress in physical fitness, you can gradually start to strengthen your exercise intensity to improve blood flow and increase your aerobic cardio-pulmonary endurance.

The goal is to train at least 30~40 minutes a day and five times a week, including but not limited to yoga, running, swimming, ball games and other sports, which can help improve the level of HRV.

3, a reasonable diet, appropriate nutrition.

If you have tried your best to improve HRV, but HRV is still low?

Then your body may have some symptoms of chronic inflammation, because one of the functions of the parasympathetic nervous system is to regulate and reduce inflammation driven by the sympathetic nervous system.

When the sympathetic nervous system produces too much inflammation, it will lead to long-term low HRV, which is an important part of HRV as a powerful predictor of health and longevity.

Chronic inflammation is our most common health killer, such as cardiovascular disease and stroke, and even related to weight gain and obesity.

People with higher HRV also have better ability to regulate inflammation, so they have a higher chance of being healthier and living longer than those with lower HRV.

In addition to managing your training methods correctly, another simple way to increase HRV is to use the power of food and nutrition.

First of all, the most obvious thing is that we often don’t realize that even a small amount of junk food has a huge impact on health by reducing any junk food with high fat and sugar that will promote inflammation and eating healthier anti-inflammatory food.

Eat more anti-inflammatory foods such as vegetables, fruits, nuts, fish and grains, and eat less western-style fast food, meat and high-sugar and high-fat diet.

If you can’t, try to eat real food and try to avoid over-processed food.

Rejecting junk food in your daily diet is a good starting point. Next, you can also try anti-inflammatory supplements to supplement your normal diet. Such supplements can help reduce inflammation and stimulate the increase of HRV.

You can also eat some key foods or supplements to increase mitochondrial function, which is another important way to increase HRV.

4. Improve your sleep quality.

Undoubtedly, one of the biggest factors affecting your HRV is your time and quality every night.

You can improve your sleep quality from the following aspects:

1) reduce the influence of external light.

It is strongly recommended that you use curtains that can completely shade your bedroom. If your room is exposed to a lot of sunlight in the morning, they will have a great impact on your sleep quality.

2) reduce noise

Do your best to reduce the noise that wakes you up as much as possible, including from any 3C product.

If possible, the room can be coated with a layer of noise-proof material.

If you can’t avoid it, wearing anti-noise headphones can also effectively alleviate it.

Nothing is more destructive to the quality of sleep than the constant noise.

Even though it may not wake you up completely, it can make you sleep lightly and lower your HRV.

3) Develop good work and rest habits.

Simply put, go to bed on time, get up on time, and don’t stay up late.

You can buy a comfortable bed. We have to sleep in bed for 7-8 hours every night, which is equivalent to lying in bed for one third of the day. A suitable bed is very important.

Before going to bed, you can drink a cup of hot milk, soak your feet, listen to light music and learn to meditate, so that the whole person can get rid of the busy day and relax physically and mentally.

CCTV exclusively reveals the original file of Rabe Diary and records the facts of Nanjing Massacre from a unique perspective.

2025年9月6日 | admin | D4

　　CCTV News:Rabe’s Diary, which records the detailed evidence of the Japanese invaders’ massacre in Nanjing in 1937, has long been known to the world. Not long ago, john rabe’s descendants donated the original of Rabe’s Diary to the Central Archives of China. A few days ago, our reporter got permission to shoot this precious file exclusively.

　　Opening this yellowed paper, lines of German recorded the terrible massacre made by Japanese invaders in Nanjing from December 1937 to early 1938. This is the famous original of Rabe’s Diary.John rabe wrote in his diary: "There are corpses all over Zhongshan North Road. In front of the city gate, the corpses are piled up like hills … … Killing people everywhere. "

　　In December, 1937, john rabe, a German in China, and more than a dozen foreigners jointly initiated the establishment of Nanjing International Security Zone. In the extremely dangerous environment at that time, they provided temporary shelter for about 250,000 China refugees in the safe zone. Rabe recorded a lot of shocking facts with a unique identity and perspective, witnessed the heinous crimes committed by Japanese militarism in Nanjing, and showed a touching humanitarian spirit.

　　Wang Hongmin, Director of Foreign Affairs Office of National Archives Bureau"Rabe Diary is a very important supplement to the existing historical archives, a true record, and an international third-party record, which is a very important supplement in our historical materials."

　　Rabe’s Diary in Nanjing, that is, the enemy plane flies to Nanjing, consists of six volumes and eight books. A red cross armband used by john rabe, a No.1 pass permit in Nanjing, and a jade medal awarded by the National Government in recognition of john rabe’s outstanding contribution to War of Resistance against Japanese Aggression, China. These precious historical materials brought back to Germany by Rabe after several battles have high archival value and cultural relics value.

　　Wang Hongmin, Director of the Foreign Affairs Office of the National Archives Bureau: "Nanjing Massacre archives were selected ‘ World memory ’ In the future, many people hope to learn more about the historical facts of the Nanjing Massacre. Therefore, Rabe’s diary entered the Central Archives of Tibet, which provided very important historical materials for our historians to further study this period of history. "