Gadgetory

some crazy news for tech enthusiasts has just broke out and this is a potential security flaw in intel x86 CPUs that apparently dates back as far as the first generation core of ice series chips these are CPUs like the i7 920's and i-35 50s for example and this security flaw which needs to be patched still on Windows has already been patched on Mac and Linux operating systems and it was rumored to see a five to thirty percent performance drop post patch but has since been reported to see some drops that are even bigger than that and other applications where performance hasn't dropped at all so what exactly is the problem well we won't know 100% until Intel lifts their embargo on the issue and that will be very soon as Windows is rolling out and update within the next few days to fix this issue like Mac's and Linux have already done but a user on twitter named brain smoke has already confirmed that the exploit is real and it directly affects the Intel CPUs as rumored now the issue itself apparently comes from a security check that should be present but is not present on intel x86 cpus dating back nearly a decade and also a RM CPUs - oddly enough and here's where the problem lies apparently low privileged applications can access higher privilege application data through the kernel page table now you're probably wondering what is the kernel well here was this guy who made some awesome chicken there know on a serious note that's not the kernel we're talking about the kernel in this regard is a layer in your operating system that exists between your applications and the CPU and memory itself kind of think of it as a core of the operating system it also routes applications to use device drivers - though within this kernel is essentially a page table which helps speed up maps between virtual addresses and physical addresses which is the memory of your ddr4 or ddr3 and within that is the same addresses that are constantly being used then a portion of cache dedicated the page table mapping will then remember where to map the virtual to physical addresses and save time though with the TLB aka translation lookaside buffer doesn't have a memory of the mapping then the applications virtual address will then go to the page table to see if the mapping of the physical address is there if not then it will subsequently access something like your hard drive or SSD so now the problem itself lies within this page table and the solution on Intel CPUs is to momentarily isolate this page table at least until the physical address is mapped and then after that the processing can continue forward however of course by doing this isolation there is a delay introduced and of course delays equal less performance and this is not what we paid for when we bought those brand new Intel shiny CPUs or even $7.00 eons from our Lee Express though the good news is that AMD CPUs especially the price performance hitters Verizon are not affected by the security flaw at all as their CPUs implement a security check where lower privileged applications that try to access this higher privilege information within the kernel or page table will be met with a page fault or quite simply rejected though that still leaves us with the question of how much will performance be affected and a Linux Hardware site called for onyx has already tested the post patch performance versus the pre patch performance on two different Intel CPUs a 6800 K and an 8700 can I'll put the links in the description below and they found there to sometimes be a huge performance drop even to the tune of more than that reported 30% and sometimes absolutely none and the half decent news at least to the majority of you guys and myself included is that the update doesn't affect gaming or single computer star workstation productivity at least preliminary numbers and that's things like video encoding or rendering to now of course here at Tech yes City I will be crunching some numbers for you guys post windows 10 update and letting you know if there are any funny bug is taking place though of course the performance hits are looking like they will affect one market in particular and that is the server market at least when massive amounts of data input and output rights are concerned that is Google Facebook and Amazon servers cloud storage services virtual machines and the list goes on and this unfortunately fair Intel is a massive amount of their market share and to further complicate things the CEO himself has reportedly sold off practically half of his stock in the last couple of months and now holds the bare minimum required for the job so interesting times ahead to say the least but honestly Intel can't you just get things right i mean by apparently not having the cpu security check enabled they gain more performance and with that they're now doing a number on themselves but i guess with that they did get the short-term gains but ten years so probably not short or medium-term but they probably actually got long-term gains out of this and yeah though honestly this doesn't surprise me I mean just look at the thermal paste Fiasco in the history of rigging benchmarks and suppliers NuForce motherboards with same sockets every single year and you can only wonder why people while wanting to buy AMD CPUs now on other news AMD stocks are up five percent and Intel stocks are down four percent an Nvidia stocks are up 6.5% so I guess this whole cpu fiasco makes people want to buy a graphics card and that's about it for me today guys if you enjoyed this video then be sure to hit that like button and let me know in the comment section below what you think of this whole fiasco I honestly think that it comes at a time when really weird things are going on in the market I mean take a look at the top two institutional investors for AMD and Intel they're both the same companies I mean the sales of CPUs have been in decline in the last few years anyway so wouldn't you pick either one of the other but both I mean something seems a little fishy here also the new urgency P use apparently won't be affected as much due to a technology called PC ID or process context identifies so I just have this inkling that for some reason ask price performance enthusiasts will get screwed over the most I mean the exploit has potentially existed for ten years and it's just ironic that it's coming to the surface now when use price performance pcs are getting very popular ddr4 Ram prices are very high though really nothing surprises me in a market where the whole industry is built on new products and sales of those new products anyway guys I'll catch you in another tech video very soon peace out for now bye