Gadgetory

the central processing unit aka the CPU they are the heart and soul of any computer they go into the motherboard it's in this case the one sitting under this nice fancy blue LED and we like to think that they either work or they don't work and I know in my history of using Tec when I've been doing extreme overclocking I have a burnt up some of these in the past most the time having fun however sometimes it's a very rare case you can get a faulty CPU and in fact it's so rare that we don't like to think of it as a problem or really anyone never really diagnoses it as a problem when a computer starts malfunctioning however in this case this PC right here has come back to me now the second time from a client well should I say ex client now because and put it this way he wasn't happy to say the least here's the thing with this PC I have replaced every single component but the CPU so today we're gonna take a look at this computer and then see what's wrong and see how you can identify faulty CPU if you ever come into one I'll go guys my computer's smoking up it's smoking up guys you're cool I have never seen a background like this before so we're now on the desktop and we've got two programs here which one of them's called UniGene heaven benchmark which is for the graphics card and the others called prime95 both of these are free to download I'll put the links in the description below for you guys but prime95 is the one that we're gonna focus on today this one will test pretty much everything so if we open up the folder and then open up the program this will essentially allow us to start stress testing our program so it'll give you an option between tests and if you go here to blend tests this one will test everything even your RAM and I find if there's a problem with the computer this will usually get down to the bottom of it relatively quickly as opposed to I 264 which is the program that I was usually using for testing out CPU temperatures which that does a great job of but sometimes in that program problems can slip through so we're gonna leave this running now for as long as we can and see if the computer will crash thousand years later so after a little while is stress testing our computer has completely froze nothing is responding and if this happens this is one of the types of errors you can get you can also get a complete black screen as well in my experience as seeing a critical error 86 code I believe it is that's a quick blue screen and everything will just restart now one thing I'm also gonna try or actually gonna try two more things and that is to quickly replace the memory again because it is probably just as likely that you could have two faulty sets of memory as it is that you would have a faulty CPU if that makes any sense and we're also going to restart the computer and go into the BIOS and do something quickly so now we're in the bias we can usually get here by hitting the delete or f2 key on the keyboard as soon as we start the machine and when we're inside here we can quickly hit f1 that will bring up the help menu and we should see here a setting called load optimized defaults or load default settings and in this case it's f5 on this particular motherboard so we're gonna hit f5 and we're gonna hit enter and then we're gonna find the exit tab and save changes in exit usually that's f10 key if you want a shortcut the Save Changes in the exit so we've got a quickly interlude before we try the next step now and that has to do with this architecture of CPU so civically and we'll look at that very soon but if you do come into a problem like we saw here today where your computer just completely freezes doesn't even give you a blue screen doesn't even give you anything else like an error message or things aren't working normally it basically just gives you a cold hard freeze or the system just shuts off completely in this very rare case you may be able to do a couple of things still and that is if you are still in the warranty period of the CPU and that's usually three years so if you bought this CPU within three years and you have the receipt still and it's from Intel and AMD and you can usually get it replaced free of charge but if your CPU is falling out of this warranty period you're no longer covered then there are some things you can try and that's what we're gonna get onto now so let's get back to so now we're back on the desktop we can open this program up called aida64 and I'll put the link in the description below for this you do get to use this for free for 30 days and that's all you're gonna need in this case anyway so we'll open up this program and then we'll go to tools and we'll go to system stability tests and this should open up the stress tests that were talking about earlier in the video but this time it will show us temperatures of the CPU now we can also open up CPU ID and since this architecture is one that's called has well and this CPUs in AI 74770 was known to have temperature problems in that they used between the heatsink and the die they used a thing called thermal paste instead of Sol during these together and this did cause major issues for a lot of people especially overclockers who wanted to extract the most out of their CPUs but regardless we can see that our cooler is connected to the CPU absolutely fine as indicated by these temperatures on the right here they're hovering around 30 to 40 degrees so our cooler is connected and it is idling okay if these temperatures are going to a hundred degrees or really high straightaway then you know you have an issue with this CPU cooler not connecting properly to the CPU so what we're gonna do now is we're gonna load this up we're gonna start the stress test and we're gonna see how hot the CPU gets after running this stress test for a few minutes so now the CPU is unfortunately getting very hot it's getting close to a hundred degrees on one of the cores it actually got to a hundred degrees and you can tell it's not the CPU cooler because when you touch it it should be getting very hot if it actually is a CPU cooler problem in this case I can leave my hands on the cooler it's only a little bit warm so what we're gonna do is take this CPU cooler off take the CPU out and then change the paste between the dye and the integrated heat spread up and then run the tests again and also another thing as well as the cable manager is definitely not how I member leaving this thing when it left the studio all that time ago maybe we have a mystery on our hands scooby-doo it's called deleting there's only certain CPUs you can actually do this on the i7 4770k be one of those CPUs so I've gotta say first impression so far this CPU actually doesn't look too good they see here the thermal base is all dried up and I'm guessing it's not doing too good of a job in terms of transferring heat from here to here but regardless let's clean all this up and put it back together so now we've booted all up again and the good news already is that our CPU temperatures are much lower they seem to be stabilizing just under seventy degrees which is great we see actually a max of 74 already so what we're gonna do now however is leave this on completely overnight and then see if it survives but also I'm gonna still give you guys some pointers and tips if you crash or you come into this stage and you still have weird problems so now if lift is on for about eight hours and the good news is is hovering under 80 degrees which is really good news considering it's about 26 degrees ambient in this room at the moment which is still very hot for 6:00 a.m. in the morning but my guess is with this PC what happened was is that the person who bought it they bought it during winter in my defense so this is the last thing I thought about was things getting hot too quickly and when I tested it when it left the studio is in really good Nick because my higher-end builds I do guarantee them for quite a while and so this is just one of those things where I think something happened in those previous six months but the good news is the CPU is working now but we're still gonna look at what you guys can do if you come into a similar scenario with an older CPU so now we're back in the BIOS and if you guys don't remember how to get there when you boot up your computer you hit the delete or f2 key and here's where we can change a few things around sometimes in a rare case have you been using a CPU for a very long time or you've bought a CPU off a person who's been overclocking it sometimes that CPU over time can degrade and here we've got a few things you can do in this case the test this out the first thing to do is just to grab the CPU core ratio here and simply go sync all cause there should be a setting in your motherboard if you don't have this setting then we'll talk another setting that you can do but what we're gonna do is we're gonna drop this all the way down to say 25 and it's very low but it's going to test out if our CPU can survive at these speeds and not be faulty so here we can go here as well the max CPU cache ratio which is the same thing it say on this platform the i7 4770k all suites so we're gonna set them both to 25 and then another thing if you don't have these options to change the course speeds you can go to a thing called CPU core voltage which is right here on my favorites but if we've got extreme tuna we should be able to find it in these BIOS settings here and I'll actually put a link to a CPU overclocking tutorial if you guys want to get familiar with this but here we got CPU core voltage we're gonna change this to one point we're gonna go I say Intel and you get manual mode and then type in one at 0.15 volts and now what this is gonna do is it's going to over volt the CPU a little bit so we've got a combination of lowering the clock speeds and over vaulting the CPU which this time around we don't really need to do this I'm just illustrating the core voltage in case you don't have this setting here so this will give your CPU a little bit more power and so if it's not running at its default speeds because it's just very old then you can try upping this as well and then just Save Changes an exit and you can give that a shot so there it is with my PC build it was the i7 4770k I'd replaced every single component on this build but it wasn't in the way that I thought it would be and so this was actually fixable in that when I replaced the thermal paste in between the heat spreader and the silicon itself it did fix the problem and I'm guessing when the person boarded they were happy with it for a few months and then things just started over he eating and this can happen is just another problem that I'm going to have to look out for now if I do sell pcs and that's pretty much dee lid every Haswell CPU that comes through here because what Intel did with this architecture to to add to the problems was that they put the integrated voltage regulator on the actual CPU itself and usually before that they'd put it on the motherboard and that actually added heat to the CPU and inside things itself so I'm grateful that my problem was fixable because the i7 4770k PU however also my time with dealing with pcs I have seen another two cases of CPUs being faulty the first other case that I dealt with was a q9 550 where in some of the computer just suddenly switched off I'm guessing the computer got too hot and then after that the q9 550 never really worked the same again in that it would have been slightly faulty and I actually had to get it replaced so in that case I sent it back to the retail they sent me another CPU out and things were all fixed in my computer the other case that I have seen was an i7 7700 K and this just didn't work probably out of the box and we did manage to over vault it and then it did work again but the thing was it was still under warranty so again we sent that one back and got it replaced so there is some weird cases that you can come in to with the faulty CPU now if it's definitely still covered by warranty I employ you guys to go get it switched over because it will give you headaches going forward as we said before in the intro the CPU is the main component in any computer that doesn't work probably everything else is not going to work properly but unfortunately if you are out of warranty then you can try doing the two things that we did in today's video so if you enjoyed this one and be sure to hit that like button also if you have ever come in to a faulty CPU and you fixed it or you replaced it or you know someone who's coming to a faulty CPU or you're still having problems let us know in the comments section below love reading your thoughts and opinions as always and I'll catch you in another tech video very soon where we have something dark something Star Wars II you guys have been waiting for this video for a very long time so if you want to see at the moment of drops be sure to hit that sub button turn that notification Bell on and also if you want to check out an inside scoop before it even gets to YouTube Instagram check yes City and I'll catch you guys in the next one he's out for now bye