UltimateByte

Well, just got a replacement 4790K. Guess what? Everything is back in order.

I've added the sum up to the begining of my original post. To answer your question: no, it didn't report correct information before the flash (BIOS was already to the latest version... from 2014 on my z87 board) which is why I tried flashing my BIOS with a newer microcode in the first place, without much hope, but I was short of ideas.

Running Windows 10, you can easily check the task manager during a gaming session and see if your GPU is at 100%. If it is, then the CPU is not really bottlenecking your performance on games you play. There are of course more accurate tools and even OSD overlay ones. Afterburner + rivatuner statistics server work pretty well for OSD. You can use task manager along with GPU-Z for simple statistics, just alt+tab your game to check it, especially after experiencing low FPS and see where is your bottleneck

Well, because of this issue I basically modified my original BIOS using UBU and MCE just to add the latest Intel microcode, that's the only difference compared to the original. I followed this guide https://www.win-raid.com/t154f16-Tool-Guide-News-quot-UEFI-BIOS-Updater-quot-UBU.html and it actually took just a few minutes to do it and flash it using the BIOS flashback function. That way my computer is a bit protected from Spectre/Meltdown as well Unfortunately, it didn't help.

@TechyBen As said in the original post, I flashed a custom version of the latest BIOS (which was already installed) with the latest Intel microcode added to it.

I bought it second hand, already delided, so I got no way to tell if it's the original IHS, but it's a retail IHS, not engineering sample. What was your idea? Thanks for your attention.

Hi, Something really weird that I never experienced in many years of practice happened to my Intel I7 4790K. It seems so rare that I can't even find anyone with the same issue using Google, and my posts on French forums basically had no answer because nobody knows what the heck is going on. The most trustworthy explanation being that the CPU is starting to die. Long story short I had a 4790K CPU working well, then it did some momentary crap having one core warmer than others which I solved by resetting CMOS settings and the name suddently stopped being fully displayed in the BIOS and every software. So either there is a way to repair that, either not. Before you come with your suggestions, please make sure you read what I tried already because I tried a lot of things. The problem in details One part of the CPU name, the one containing working frequency which I believe is stored into the CPUID totally disappeared. It results in missing information basically everywhere: in the BIOS, in hardware information softwares, in Windows, even in Linux (cat /proc/cpuinfo won't show the CPU name) and in Benchmarks that won't be validated. The CPU is working perfectly fine other than that, but it's not a good sign and if it's becoming defective and there is no solution, then I will have to replace it. Where does the CPU comes from This is a second hand delided CPU with a light overclocking and speedstep enabled (wasn't before but gotta reduce the electricity bill) and a light OC@4,6Ghz, which has been running at very decent temperatures, 80°C peak during OCCT testing. It was previously cooled using a Thermalright Silver Arrow, and now using a Be Quiet Silent Loop 360. Symptoms - Around a month ago, I had a suddent isuse where Core 0 was 35°C warmer than others for no reason. I resolved the issue by doing a clear CMOS. I believe this is the moment when the CPU lost its CPUID information because: - After that, I noticed that 3DMark was unable to validate the result because it doesn't detect the CPU properly: https://www.3dmark.com/3dm/26385270? while I was able to run proper benchmarks with the same CPU before https://www.3dmark.com/spy/2384642 - Geekbench has the same issue : Now it is unable to detect the CPU and shows a Pentium II/III https://browser.geekbench.com/v4/cpu/8190856 while it didn't before https://browser.geekbench.com/v4/cpu/3964381 - The BIOS doesn't show the CPU name and frequency, but other than that, all stepping and other information as well as voltages are correct. - Windows won't detect the CPU name neither, both in computer details and device manager. - Basic displays of CPU-Z and HWInfo show no issues at all, but the data export from CPU-Z shows missing information My diagnostics While I'm not 100% sure, I think this issue was not here before, especially thanks to my old benchmark links that showed proper information, unless 3DMark and Geekbench now use different ways of telling which CPU this is. Unfortunately, I didn't dig into this before because CPU-Z showed proper information at first glance, so I had no reason to. Using a spare Celeron I have handy (used it in a home NAS), I checked if it wasn't a motherboard issue by swapping the CPUs and using the CPU-Z export function. This test was very relevant because I found that there was missing entry in the CPUID: The "Specification" field was empty. You can download CPU-Z exports here https://cloud.lrob.fr/index.php/s/VWrxyzzNoi5zJsL What I already tried I also tried many other things that didn't lead to any solution, including: - Removing CPU drivers from windows on each thread and try forcing the proper one, but still shows "Uknown device" - Reset factory (aka "optimal") motherboard settings, both within the BIOS and by removing the battery - Trying with another CPU (celeron) to see if it had proper CPU info, and it had, so it doesn't seem to come from the motherboard - Modifying my BIOS to contain the latest Intel microcode and flashing it Lastly, I will try putting my CPU in a friend's PC to check if it detects the CPU properly, but my guess is it won't. My request If anyone here has any idea, any clue on how to resolve that issue or just wants to show some compassion, please share on this thread! TBH, I'm already on my way to getting a new second hand 4790K but I'd still like to save this one... Thanks! Screenshots Aida64 showing missing information With a Celeron, the BIOS shows proper CPU name information: But with my 4790K, it shows nothing. Windows is unable to detect the CPU

Followed them on Twitter, i didn't know about that brand that seems cool, so thanks for this partnership. Currently, I have a shitty Dell Keyboard as my Logitech Illuminated died after 5 years of loyal service. As a Mice, I own a Steelseries Sensei with a good enough sensor but Laser makes crap on my QCK+ Mousepad which is disappointing, so i have to use my old 9HD pro. The glide is quite bad and the mice still not light enough to my liking. I can't complain about my audio setup : as sound is one of my jobs, i'm running an external firewire soundcard, with audio pro-grade monitoring speakers/microphone/headphones. However, I'm curious to discover what's an Aria headphone worth. Hopefully i can finally win a giveway once in my life !

Well, i built and offered a PC to the best woman in the world, with an HD 5870 in it, a few years ago. The computer is running fine, especially the OCed 2500K, 32GB RAM with an SSD, but the GPU's becoming to feel old. I'd love to offer her a GPU upgrade in order to see the difference in Adobe programs and to be able to play newer games with decent framerates. Ultimately, she would finally consider a monitor upgrade, improving her already amazing photography work. Hopefully i can win a giveway once in my life for the most amazing person in the world.

I have to change my fragile mice from a competitor because it's nearly dead and always wanted to try Roccat products ! I enter this giveway with a huge joy ! <3 Many thanks to Roccat and LTT !

I take part of this Giveaway ! So much to love about that phone ! Not sure if i prefer the slow-motion, 4K, or the 5 Mpixels selfy cam that looks kickass or even the main cam, but cameras are definitely the greatest thing here. Let's say slow-motion is my favourite !