RAM Latency vs Frequency - Why It's Important - ThioJoeTech
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- Опубліковано 22 лют 2015
- RAM Timings Table: drive.google.com/file/d/0B5eP...
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--------------------------------------------------------- - Наука та технологія
latency is like how fast someone gets off the couch
frequency is how many things the person can get done while off the couch for a certain amount of time.
so you're saying that we all have pretty terrible latency?
Perfect
Frequency is my job
Man helped a ton
Best analogy I have ever heard
I'll remember this next time I download more ram!
Info Teddy are you the one that started this trend
@@natesenft5376 yes he is
Thanks for putting these together, I am a long time IT professional and I try to educate my clients as to the "why" something works the way it does. I am a big fan of education and knowing how a tool works. I would like to add a tail on to this, as I think that this topic is important enough. Pro Tip: This may require a little math or at least the spreadsheet mentioned in the video. There is one more piece to the performance puzzle. That is how much data your CPU will crunch through per cycle, and how it matches up with the operations/second - Total Bandwidth. Try and avoid too much of a difference on either side. if you are starving your RAM, (RAM frequency higher than how much data the CPU sends back, in multiples that can leave a remainder product. This will cause the RAM to fall into wait states or Idle, and in the case of video games, can cause a "stutter" (another thought on this at the end). If your CPU is too fast then, obviously, the RAM gets overwhelmed. When this happens the buffer tells the CPU to go into wait state and operations are paused until the RAM can catch up. Most public sector CPU's have a small finite amount of on-board cache (L1, L2) to hold these commands/information. High end CPU's can be as high as 12MB. Not a lot relative to RAM these days.
About game stutter: If you have ever installed a new graphics card and notice a game you are used to playing is now stuttering even with the HUGE COSMIC POWER of a new card. You have even lowered the graphics settings trying to even it out to no avail. What is really going on is the new card has evolved. There is probably newer logic that handles things like shader operations, or light vector/reflection calculations more efficiently. Freeing up clock cycles. So again, when you lowered the settings, you effectively are starving your data bus and GPU, and they are initializing that wait state until more data has been processed. Stutter. Try increasing the graphics/effects level in your game. In this situation, it will respond favorably. Your new card can take it. Just a 2 cents, I found relevant to this GREAT POST!!
Pretty inaccurate info here!
Watch this video before you buy any more RAM.
ThioJoe Don't forget to download more RAM!
Very good explained 👌
you need more frequency than ram and ram also
okay, alright.
I guess Im kinda off topic but does anybody know of a good place to watch newly released series online?
I am so glad I discovered your channel. This is mostly heavy stuff for me, I'm racking my brain trying to understand it, but it's extremely helpful. Subscribed
Dude I hope your channel will grow fast! A lot of time it must take you to do these videos, really great work, thanks! :D
Such great information dude! thanks to this video I managed to finally decide which RAM to choose. Thank you!
Thank you ThioJoeTech. Good and fullfilling explanation, and doing the hard work on the spread sheet is appretiated!
Good Video. Being CompTIA 801 and 802 certified, I appreciate 1.) That someone covered this aspect of RAM, as I haven't seen another video specifically on latency, and 2.) That you did a very good job explaining it.
So well explained! I watched several articles about this and nobody explained this better than u. Congrats. And thanks for the tutorial.
I just love how he looks in the camera. This is just awesome :D
All your vids are great, Thio! Thanks :)
Thank you very much for this video! Your explanation was very clear and detailed. Now I can build my ultimate music production rig with confidence!
Awesome video, of all YT I watch, videos like this are rare, you just made it perfect!
Thanks for the informational video! It's gonna help me determine what ram I should get and what to look for. I need to check the frequency of the chips I'm looking at
Awesome thank you! I didn’t know latency was in RAM. I had heard of it in graphics cards but now I know more! You are awesome.
Thank you for this clear guide, confirmed what I thought was right - as I'm preparing to build my first gaming pc this autumn.
Thanks for a very educational video. A difficult subject but well described & great excel sheet. I have used it to find my first computer build's memory sticks.
Coming from an assistant professor of engineering, very nicely explained man. I know many professors who can't explain shit.
You forgot to mention that the Mainboard has to support the frequency and latency of the memory you buy, and also you may have to manually setup the latency in bios for high performance ram, otherwise the ram will run at some defaulted "auto" latency.
This is just how to compare frequency and latency from one ram (kit) to another to determine which is actually faster. What your saying is more advanced/installing setting up and using at X speed
Can I put ram from Samsung and kingstone in the same laptop?
@@md_ez The manufacturer of the ram chip is normally insignificant, this is the reason for standardisation of the PC components. So as long as the chips comply with the standart they clame and that is also tolerated by the main board, they should work. For noname or fake chips the compliance with the claimed standard of speed is usually poor or ignored altogether, and that is usually the problem.
@@florinpandele5205 the same clock speed (data transfer rate) and specifications, Samsung and kingstone..
Is it ok to add them in the same laptop??
@@md_ezThe kingstone sounds like a counterfeit Kingston. But if it is just a spelling mistake, you can put them in. Of course they have to match the laptop slot and specs. For example some laptops may not see a configuration of 4gb and 8gb on the 2 slots as valid and only use the first 4gb in the first slot. But this should not normally damage in any way the second ram chip . After installing first check the laptop's bios to confirm that both chips are used. After that run some ram check software like Aida64. Good luck .
Great video...Good job ThioJoeTech! this actually helped out alot
Thanks for doing all the hard work for me :)
+Alexander Libby noooo problem
where to find 2400mhz ram with cl 12 ....it was in the table
Corsair Vengeance CMK32GX4M4A2400C12
@rakshit nasikkar Corsair Vengeance CMK32GX4M4A2400C12 for example
@@LeoBos HyperX Fury ia sau better AND more quality
Seriously the best video when it comes to explain rams, you got a new subscriber ! The only thing missing I think is a possible benchmark of how it affects computer speed for various task like video editing, gaming and such.
Hey Joe thank you so much for putting the chart out I've been watching you for a long time subscribe for a long time and you got a great sense of humor you really put out some valuable information thanks man Dave
Amazing job! Thank you so much. I was looking for that :)
Thank you so much! I’m quite excited to power thru this channel. Finally someone who makes sense lol
This is by far the best explanation of ram latency/frequency I've ever seen. the excel spreadsheet was the cherry on top.
excellent video. always wanted to know the use of latency, now I know. Thanks a ton!!
Informative, practical and a great reference chart thanks man, sub’d
Wow this is what i needed to know, great job with the video. You're a true computer expert.
Great video. You are very good at explaining this stuff!!
Thank you Sir for this tutorial. Somehow got something in to my head a bit :D
Nice one thio for sharing that knowledge👍 just continue doing related videos to fully understand diff components of a pc.
Well explained. Perfectly simple. Thank you. Flawless execution.
Thanks. This video and the chart saved me a huge amount of toil and research.
This is the best RAM video on UA-cam. Thanks :)
Ever wonder what the heck CAS Timings were? Well they're more important than you think.
I somehow can't trust you anymore Joe, your joking channel did this to me...
NeedMoreMushrooms oh well, you shouldn't trust anyone anyway
***** Thanks for the advi... wait... 0_0
***** You want the lowest response time. Doesn't matter what the frequency or latency is alone.
***** riddle me this... please go to this link and sort by price high to low:
www.corsair.com/en-us/memory/dominator-platinum?memorytype=DDR4|&memorysize=32GB%20Kit%20(4%20x%208GB)|
Why is there such a big price difference between the top 1 and the next 2? Ok, 1.2 v is the major difference between the most expensive and the 2nd most expensive. But the difference between 1 and 3 is only the CL and Freq which isn't "huge". however for $500 bucks difference there must be something driving the price? You can select the 3 and compare to get the difference in specs.
Thank you for this video, it was very helpful :)
+ThioJoeTech, Thank you for making that spreadsheet table, it has helped me understand the Frequency/Latencies much better. You're awesome!
Thank you for making this video. It was very informative.
Awesome video, very useful!
Thank you!!
I watched every popular video about the subject and I never understood RAM speeds/latency .. until i watched this video
Great video Thank you!
Hugely usefull video! Thanks Jeo! :)
I wanted to know the details for the last few months. Best explained with quality video as always.
Best explanation! Thx for the timing table!
thanks bro... nice and simple and a very handy resource
Thanks mate. You broke it down very clearly and have made it easy to understand.
The only other thing I would have added is there are usually sets of CAS numbers quoted instead of a single CAS number. I don't understand about these sets.
love the videos man
thank you so much! helped me to pick the right ram
Thank you for the nice table! :)
Thanks Joe, that table is very helpful!
Any one else notice the tube of vasaline?
Lmao
Next to the dual monitor setup...
Shake shake ✊💧💧
😂
Lol
Finally someone who explains it perfectly!! Thanks for the info!
Thanks for the table, that's really useful ;)
I kept expecting the wrong information as a joke per your tutorial videos but I was pleasantly surprised it's a serious video. Thanks for the info.
thanks for sharing your knowledge, man!
Old but useful. Now I'm glad I discovered your channel.
Glad I saw this video before going buying my RAM. Kudos to you for putting all the time in.
Exactly what I needed. Thanks!
Thank you so much for this video
great video,i learnt alot!!
Excellent explanation, thank you very much!
Thanks for the video!
Thanks man, that was awesome! :)
Very informative video, thank you!
Wow thankyou so much. Ive always wanted to understand more about the hardware of computers but the terminology always bamboozled me. You help put it in terms i can actually wrap my brain around and absorb!!! Makes wanting to build my own gaming rig seem less intimidating!
For most normal gaming and all normal work, RAM capacity is the most important, just pick the best cost with the capacity you need. Faster RAM has almost no influence to your PC performance (some consider that an extra 1-2 fps is already a huge impact, I won't argue with that).
Aiming for faster RAM will be beneficial mainly if you do content creation and on some games e.g. GTA V. Here, keeping cost in mind you would probably want to find the best RAM for you after you decided the capacity you will need. The calculation in the video will spin your head off in real life...try this instead...which is basically the same...Just remember, this will be less precise but a lot easier to remember.
Just do simple math: Freq/latency is A. Look for RAM kits with the highest value A with the best cost you can find. You will then find e.g. 1600/8= 200 is as fast as 2400/12=200. In this case, no need to spend more for the 2400MHz CL12, if the 1600MHz CL8 is cheaper. (not very realistic example, this is only for example)
good info ThioJoe ,
thanks
Excellent, thanks!
Great video explaining latency, I must admit before watching I didn't know exactly what RAM latency referred to. You make the math seem simple but I can't help but wonder how CPU cache pre-fetch would impact things, perhaps shifting the advantage to higher frequency again.
Higher frequencies I imagine would have the advantage again until unexpected memory is accessed creating a speed bump in the road back to latency. Food for thought on where the sweet spot would be then, results would vary depending on cache size, level architecture and pre-fetch algorithm.
thank you! very helpful video!
that was extremely informational! I now am questioning my RAM purchase.
for sure dude, lower the cas the better ive know about this for a few months, ill report back to this video after I change my ddr3 1600 cas 11 to my new ddr3 cas 8 1600. I'm expecting a big performance improvement in my cpu clock speed and my gpu scores. :D
Thank you very much, you helped me choose the suitable memory for my computer.
Well explained, that helped. Thanks :)
Thanks, very informative!
Really nice video, you should also add the rest of the timing calculations and equations. It gets really technical, but all 4 of the timings play a factor in the overall speed. That being said CAS latency is the most common, however the RAM I bought for my computer(on sale, so it was more economical than the normally cheaper RAM I bought in the first place) is actually a little slower than the old stuff I had and according to just frequency and CAS latency it should be faster. The tRP is the latency slowing it down compared to the other.
This. I'm watching this video in 2021 where there's a massive chip shortage in the world, and manufacturers are shipping their products with slower tRP to meet the supply demands. This makes a massive difference to memory performance, and by extension CPU performance as well.
Thanks a lot man!
Thanks for the no bs quality video.
Thanks for clearing this up
Thanks for this video :)
What to do while adding an additional ram. should we match the Cas latency [CL] and Frequency [MHz] both?
And also if both are same can we use different sizes(like 8Gb and 16Gb sticks together)?
thank you very very much for this helpful info
Good information for my X99 Build. Went with 32 GB 2400 MHz with a latency of 14. Cost only 229 dollars instead of 300 - 500 dollars. I also can overclock it hopefully if they did not lock the voltage.
Thank you for the explanation.
i dont install more ram because i dont want to get a virus
Thanks man!
Thanks bro!
thanks a great educative video
Nice CAS Latency explanation man. Thanks!
I'm looking for 28.5THz with CL 0.0000000001
+Born Boy >all those up and down and quarter clocks
Did u find it :D
When your frequencies have frequencies
Great job ! thanks !
My english is pretty bad ( im from germany ) but i understood everything you said.
it was very unterstandable how you explain how Latency works.
good vid bro!
One thing. Faster memory with higher latency will perform better than the slower memory with matching lower latency once the request is received because you don't need to send a request for every byte of data in memory. ;-)
so basicly more ram less speed and less ram more speed
so basicly more ram less speed and less ram more speed
An example of a tech not knowing everything I didn't know this, thanks!
Thanks for educating me ^^
This video is awesome, thank you. That said, I still can't figure out if I should buy 3200 speed RAM with CL of 14 or 3600 with CL 17. According to this video, if I'm understanding correctly, the 3200 would be the winner. Is that true?
Must say this was helpful. Thanks
Which is better? 1600 mhz cl 9-9-9 or 1333 mhz cl 7-7-7 ? For gaming , speed open apps?
Thanks! Saved money!
Best informed information about ram😎🍻✌🏽