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Ask GN 17: Why Only 99% GPU Utilization? (& Coil Whine)

2016-05-11
everybody we're back for another ask Jian episode I am freshly back from Austin Texas where we did that and video preview of the GT X 1080 you can check all that content on the channel already but this is our series where we answer some of the questions that you all submit so if you have a question post it below I will try to get to it I will say last time there were some very good questions I'm not gonna get to them all today if I miss it you want to try again leave it below and I'll see if we can do in the next video today he starts off with a weird name its ex ex Sharik xx YY oh I guess he says or she says hey Steve went under full load why is the GPU maxed out at only 99 percent when the CPU can be at 100% so I actually checked on this because it's a really good question I didn't know the answer to and I emailed that some of the people at Nvidia talked to Jo vivoli who said that it basically comes out to a rounding error so that's all there is to it it's effectively 100% load and by gpu-z will report that as 99 percent loads just a rounding thing but you can basically imagine it as 100% so that's the quick answer to that one the next question is from exiled storm who says quick question that you could probably address a couple of seconds unlikely I have an MSI z97 gaming 5 motherboard and I noticed when in the EOC settings on the BIOS that there is a memory try it mode and I'm not sure what it does or what it means what is it so memory try it is MSI's way of really quickly and sort of lazily tightly timing the memory timings so there's the cache latency CAS latency and if you have maybe 11 13 13 latency on your memory you can do memory try it for cats 11 and it will just quickly tie in all of those tertiary timings and all the low-level times that are harder to work with manually and and basically take care of it for you so that's all that is you would basically use it if you're trying to do some sort of lazy mode memory overclocking there's nothing wrong with that but that's that's all that's for next question amir mahmoud who says i have a question for the next ask GN i would find an answer to any where all caps and it slowly become the bane of my existence my pcs fans are connected to the motherboard via three pin fan and controlled via BIOS so this all done through BIOS with a user made custom fan curve but that's that's not really controlled by BIOS with a user made custom fan curve the fans will randomly ramp up to 100% and spin at that speed for a few seconds and then slow down and then ramp back up the only fix I've found is to increase the minimum fan speed in BIOS slowly so it sounds like this boils down to something with the fans I don't know what motherboard you're using but some fans will have sort of a minimum speed where the motor can sustain the rotation and if you fall below that speed then it's it's just not gonna work you'll either depend on the fan either turn itself off or it'll spin at a higher speed than you asked for because it can't sustain certain speeds at a certain rpm and depending on what the motor is capable of pushing so that might be it might just be a case of needing better fans for pin pwm header might help you out a bit the three pin headers that are controlled through the motherboard are basically just being put on to a 3 volt 5 volt or a 12 volt rail from the power supply going into the board so if your fan speed doesn't happen to really fit on one of those very well then you might experience all the issues you're talking about otherwise it could be something with the motherboard maybe a BIOS update well that's where I would start as those two things next question is demagogue who says a gamer is Nexus can you touch on how to buy quality products that do not produce coil whine this is a big problem for me when I'm bowing for power supplies and stuff like that there's another part of this question too for the first part coil whine is an issue especially with diffuse where if you're producing maybe 3000 FPS on a menu screen for example in The Witcher a lot of cards will start whining pretty high-pitched noise and that's just from the coils in the card being unhappy as far as looking for something that doesn't produce that it really just comes down to reading professional reviews so for power supplies we don't review them because to do it properly I would want to buy like 10 thousand dollars of testing equipment so we don't review those the people I trust he do review them would basically just be Johnny guru I would check Johnny gurus reviews on a power supply you buy it if you're really concerned about coil wine and see if he was able to produce some and if not then you're probably good shape but that's really all it comes down to there there's no secret trick to what components do these manufacturers use it's it's really just how does it perform in the review and what do people think of it and in our video cards you card reviews will note that if it has coil wine or something as well quality products you're basically looking for things like solid capacitors on them some people call them black capacitors some people call them Japanese capacitors but you want solid capacitors higher-end vrm or electrical design and that's stuff that really without looking at it and knowing what you're looking at you you wouldn't be able to gauge what's better than the other but manufacturers of course will all say that they have the best electrical design so you can't really just take their word for it either so it just boils down to reviews now the second part of your question do you think some companies are lying to us about stable overclocked speeds at 1400 megahertz I guess where it's actually not stable for the components and where I should have gone with a 980 I at 1,100 clock versus the overclocked one I so there's a couple things here over clocks depend on what's called the silicon lottery so there's sort of a limitation on every GPU and everyone is different or every CPU they all have different voltage allowances and frequency tolerances and it depends on the ASIC quality depends on just how well your chip Bend because they're not created equal and that's not an intentional thing it's just that it's silicon manufacturing isn't a perfect process so that's certainly some of it they may have if your case is personal it may be that they were able to work on a higher or a better bin chip than you got in your retail card whether or not I would use that I don't know that I would use the phrase line to us when you're talking about over clocks most manufacturers should be pretty conservative if they're listing a number that they think is achievable you I know Kingston and Corsair are both fairly conservative in their memory over clocks for example where they'll say what's realistically expected for that particular chip as for video cards 14100 is megahertz for certain devices like a 980ti is certainly sustainable we've been able to sustain it but it does depend on what you put for voltage depends on the vrm design of the card not all cards have the same vrm some have more phases depends on the chip itself silicon lottery again so if there's a lot of stuff at play but I don't I wouldn't go out and say that companies are intentionally lying to you it just it there's a lot of stuff moving around but you can check our reviews we do overclock and we'll list like what our stable clock rate was after efforts to do a high OC and that should inform your decisions about 1400 I will say 1400 1450 megahertz is fairly high to sustain in the long term like a couple of years but if you're just going for an immediate short-term overclock maybe a year or so of uses usage then you can get away with something like that on most devices I've personally tested last question for this week is from ill to Xbox who says hey Steve I have a question on my since I was thinking of upgrading from my cheap standard Mouse to something better suited for gaming how much does polling rate actually matter is 500 Hertz good enough or will I actually benefit from 1000 Hertz and games is 1,000 Hertz of meaningless marketing strategy thinking of buying the g6 r2 whereas the similarly priced yrg 502 has a 1,000 Hertz polling rate the g6 co2 has over 500 spline rate so we talked about this a lot in the G 900 review that we recently posted first of all I would suggest checking that out and that's for everyone because that has some pretty cool engineering stuff we talked about that we don't normally go into but with regard to this question specifically I am NOT the best person to purr to answer if 500 Hertz raises a thousand Hertz actually really creates a perceivable difference because I'm not I'm not at that level of competitive twitch gaming where I would see it myself I would be better off improving my own skill first but if you're a really competitive gamer then maybe I will tell you that the difference is effectively one millisecond so if you have a 1000 Hertz polling rate it means that your mouse is communicating that input and all of the movement to the computer every one millisecond and that's different from from the click latency and things like that this is specifically talking about the latency from the the device the mouse to the system or to the host so a thousand Hertz is one millisecond pull a response time 500 Hertz it's going to be 2 milliseconds half that speed so there's there's a one millisecond difference there whether or not you can see that top to say I will tell you that I personally do not see it I just not I don't know maybe you have to be like a pro eSports player or something but even when I was very competitive with Starcraft 2 I didn't see that difference really so that's my take on it certainly if people who are watching this think that they can tell the difference leave a comment below maybe help ill to Xbox out with what you do and how you notice it as far as the next part the g6o tubers the G what is it G 502 I really like both the g6 r2i I haven't used in a while but it was one of my favorite mice when I did use it it's got a good feel to it it has a good weight it's not nearly as light as the G 900 if I remember correctly the G nine hundreds pretty impressive but it's also $150 so that would certainly be the best of both worlds if you want to drop 150 bucks on a mouse but for most people I think you'd be happy with G 602 or g502 if you're looking strictly at Logitech if you want to look outward of course there's m65 Pro we're working on reviewing right now it's another one to consider or cheaper versions Logitech G 303 something like that SteelSeries sensei but yeah I like G 602 just fine so it just depends on on what you're going for I guess but for things without a wire and that aren't $150 I would definitely consider it strongly that's all for this week I don't really have any hair or beard questions from you all I'm very disappointed as you can see I grew one over the past few days anticipating such questions but alas you've left me to have your comments below if you have questions for computer hardware or whatever else thanks for watching pay traveling special video I'll see you all next time
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