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Core i9-12900KS World Record: How I Hit 7.8 GHz on 8 Cores
- xupybd 5y agoI'm not sure how you avoid condensation damaging your motherboard at that temp?
- giuliomagnifico 5y agoInsulation. Here you can see the motherboard getting prepared for LN2 overlock: https://www.tomshardware.com/reviews/overclocking-amd-ryzen-ln2,5116-2.html https://www.tomshardware.com/reviews/overclocking-amd-ryzen-...
- Dylan16807 5y agoYou cover it with kneaded eraser or petroleum jelly or some other sealer, and cover that with lots of towels.
- megous 5y agoYou can see on the pictures the MB is modded to avoid this.
- xxs 5y agoyou prepare it using wax/conformal coating (+towels) - it's quite a standard procedure for sub-ambient cooling.
- wyldfire 5y agoYou could use one of those non-conductive liquids [1]. They have products with pour points going down below -100C. Depending on the interface between the liquid nitrogen and the coolant it might still flow well. [1] https://www.3m.com/3M/en_US/data-center-us/applications/immersion-cooling/ https://www.3m.com/3M/en_US/data-center-us/applications/imme...
- cl0ckt0wer 5y agoIf you're interested, here's a video of when a youtuber did it live on a 5900x about a year ago. They go into fine detail about the process. https://www.youtube.com/watch?v=ISmyfzlf8SY https://www.youtube.com/watch?v=ISmyfzlf8SY
- WaxProlix 5y ago5950X* And it's GN, a very rigorous testing, review, teardown channel with a team behind them. Feels like "a youtuber" sort of does em a bit of injustice :)
- svnpenn 5y agoSaying GN doesn't really mean anything, unless you already know who they are, which obviously the person you replied to doesn't.
- xupybd 5y agoThanks that answers my question. Much appreciated .
- gnopgnip 5y agoYou use Vaseline, electrical tape and duct tape, paper towels, and good airflow for extreme overclocking. And there will be condensation, but a motherboard won’t last long anyways, burnt out vrms and fried cpus
- olddustytrail 5y ago
- blackoil 5y agoCan extremely dry air be used for it, or will it have some other side effects on Thermal conductivity?
- c_o_n_v_e_x 5y agoYou apply a conformal coating to the PCB.
- Ratiofarmings 5y agoWell, partially with good insulation, Vaseline or plastidip coating. And partially, you just don't. It'll freeze over and since this is for competition and not daily use, that is okay. Usually nothing gets damaged, sometimes it does. Extreme OC is expensive.
- kllrnohj 5y agoThe other answers all cover the prep, but the other key part here is you just don't run like this for very long. You run in like 1 hour bursts, and let everything dry out (and warm back up) between runs. So you're just not giving condensation enough time to build up enough to cause shorts in the areas that are not fully sealed off, or at least that's what you're banking on.
- namecheapTA 5y agoAuthor was given these parts for free. Basically worthless test. If he was given the funds to buy parts at random somewhere, it would be interesting. But to get parts sent to you from Intel and then say "omg look how overclockable" is advertising at its finest and by finest I mean worst.
- Dylan16807 5y agoI'm not sure why the price matters. And reviewers don't tend to get golden samples in general; it's possible overclockers get some but I'd want to see evidence. Since they sent 14 this is probably legitimate.
- deleted 5y ago[deleted]
- namecheapTA 5y agoIt's not the Price that matters, it's the source. "Since they were sent 14 this is probably legitimate"??? Are you saying intel couldn't find 14 of the best of the best to send him? 2 they could pull off, but not 14?
- pmontra 5y agoIt's inherently worthless because none of us are going to overclock our PCs and cool them with liquid nitrogen in daily use. It's a sport and top athletes routinely get their tools for free from manufacturers. In some cases they are custom built. An example where tools matter much more than the people using them: Formula 1' 1.6 liter engines are built, tested on a bench and only the best ones go into cars, 3 of them per car per year if nothing goes wrong. The author basically did that with CPUs.
- szundi 5y agoAccording to this logic, life is meaningless
- 5y ago
- ehnto 5y agoThis was the kind of stuff that excited me back when I was first getting into PC gaming. Nowadays, computers are so fast and games are so forgiving that I haven't had to fuss with overclocking for years. Back then it felt like the only option, getting maximum frames was a function of my ability to build a highly effective cooling setup and how much patience I had to tweak everything. My very last foray into custom cooling was a homebrew phase change cooler using a cell I had bought off eBay. This is making me want to jump back in just for the fun of the build. But without the need for performance, it does lack a bit of thst purpose it had back then.
- the_only_law 5y agoUnfortunately one of my favorite games of recent time (Total War Attila) is almost incapable of running on my current vanilla setup at decent frame rate (not a top of the line gaming PC, but a decent machine with a Ryzen 9 and a 30 series GPU) due to poor optimization and abdonment. The hardware used is years ahead of the game.
- sph 5y agoSame. I got tired of arguing on forums that some games I play are badly optimised, and it's not my $3000 desktop PC the bottleneck, especially when the vast majority play on a thermally constrained laptop. There's some nasty software around that would have issues running on this nitrogen cooled rocket. Good hardware in gaming has somewhat become a waste of money because often the bottleneck is just bad unoptimised code, and if you had worse hardware you'd be happier compromising; meanwhile good game engines (like id Tech) fly on any modern hardware.
- the_only_law 5y agoIt becomes ever worse on Linux. I remember being basically unable to play native ports, only saved by proton. > and if you had worse hardware you'd be happier compromising hah, when the game in my original post was new I was running it on garbage tier hardware. I got spoiled when I had a top of the line GPU. Nowadays I have to run it like I still have decade old hardware to get decent perf.
- userbinator 5y agoIf you're curious about absolute maximum clock frequency records, the top is at another GHz more: https://hwbot.org/benchmark/cpu_frequency/halloffame https://hwbot.org/benchmark/cpu_frequency/halloffame Almost entirely AMD FX-8xx0, with two Celerons.
- winrid 5y agoThose Celerons were not known for running cool when stock, either. Evidently the Celeron D is very overclockable. Still, 8ghz. Wow.
- userbinator 5y agoHaving a longer than average pipeline for the frequency (and the longest pipeline ever made for a production CPU, in the case of the Celeron) certainly helps. They have a 31-stage pipeline, and the AMDs have 20, while other CPUs are around 15: https://en.wikipedia.org/wiki/Comparison_of_CPU_microarchitectures https://en.wikipedia.org/wiki/Comparison_of_CPU_microarchite...
- speed_spread 5y agoImagine a liquid deuterium cooled Mill CPU running Half Life 4!
- 867-5309 5y agothat one person on the table using liquid helium - bet they did it for a laugh
- userbinator 5y ago...a very high-pitched laugh.
- 867-5309 5y agoindeed! I was confusing it with nitrous oxide
- londons_explore 5y agoI'm sorta surprised there is nobody running liquid nitrogen cooled overclocked chips 'in production' and rentable. For some usecases, such as running a single threaded application you just can't optimize any more, it would be worth the added cost and complexity to get a chunk more single threaded performance.
- deleted 5y ago[deleted]
- etaioinshrdlu 5y agoI think it would be good for server applications. Possible reasons why it's not done are the very high energy cost of the cooling setup. I'm not sure if it's possible to bring the cost down enough to a practical level. Another reason might be lower lifetime of many of the parts involved.
- PartiallyTyped 5y agoI think that this would be great for HFT, but ... what do I know.
- caffeine 5y agoNot nitrogen-cooled, but liquid-cooled overclocked rackmount servers (with consumer gaming CPUs rather than the usual Xeon CPUs) are a thing in HFT. They’re crazy because they are so unstable that you basically can’t reboot them and expect them to reliably come back up, so you are stuck on that given kernel version and firmware etc (important for eg the custom network cards that often want firmware updates). You just turn it on, run it for like a year, and then it dies and you trash it and get a new one delivered.
- bitcharmer 5y agoWe use heavily overclocked 10980XE and beyond common teething issues with voltages and some specimens just frying the survivors definitely offer stability if you don't push them insanely far. But I'd agree on the bleeding edge being generally more bleeding than edge (esp. from a performance engineer perspective) with problems ranging from kernel not supporting TSC calibration correctly to acpi issues to faulty (fried) instruction cache.
- mrtksn 5y agoDoes anyone have an idea how would the situation would be with Apple M1 if actually pushed as hard as this CPU? Sure, Apple doesn't allow it out of the box but are we out of luck for hacking it? Would it actually have dramatic performance increase when overclocked? Is Apple leaving some performance on the table in order to achieve silent operations? All the tests I've seen with Apple M1 vs Intel, have been between Apple M1 chilling at full load vs Intel being cooled with a loud and powerful cooler(or liquid nitrogen in this case). What if M1 was held at 100C with loud and powerful cooler or liquid nitrogen?
- chickenimprint 5y agoApple is using a high density library on TSMC 5n. I'd be surprised if golden samples could hit even just 4GHz on LN2.
- deleted 5y ago[deleted]
- lynguist 5y agoYou would theoretically get something akin to the latest Intel processor running at over 10 GHz. I fully expect that once Apple releases their server class CPUs at the end of this year we’ll get something that’s equivalent to the latest Intel processor running at 7 GHz.
- InvaderFizz 5y ago> I fully expect that once Apple releases their server class CPUs at the end of this year I assume you mean MacPro by this. I haven't seen anything indicating something bigger than the M1 Ultra coming anytime soon(pre-2024). Hell, the M1 Ultra itself was a surprise to me.
- Bilal_io 5y agoI saw M2 mentioned somewhere, but not sure if we'll see it this year.
- rbrbr 5y ago
- Wright123 5y ago[flagged]
- Wright123 5y ago[dead]
- c_o_n_v_e_x 5y agoTo the home experimenter, please do this in a well ventilated area. Nitrogen asphyxiation is no joke.
- rwmj 5y agoIntel fused off AVX512 instructions completely on the Core i9-12900KS Am I right that this is something to do with scheduling and the Efficiency cores not supporting AVX512? So a process that's in the middle of running an AVX512 instruction might get scheduled to an E-core? And so with better OS schedulers this could be fixed?
- willis936 5y agoI don't think Intel ever intended AVX-512 to be used by people who buy non-enterprise chips. People getting them enabled with workarounds (disabling E-cores) probably signaled to Intel that they needed to shut it down. It's nasty, but it's how Intel operates. AVX-512 and ECC are some of the few value adds for their Xeon line. They couldn't get away with charging 3x as much for the same processor otherwise.
- eMSF 5y agoAVX-512 in consumer chips was not new to Alder Lake, though; the previous generation did support it without any workarounds (there were no E-cores to disable to begin with). Intel may have changed course regarding AVX-512 but I wouldn't be so sure about the reasons.
- willis936 5y agoThat's true, but it seems like the consumer chips that did have AVX-512 came out when Intel did not have the single threaded performance crown. We can only speculate on what Intel's motives and plans are. I think they should embrace any ISA advantage they can muster in every CPU they sell.
- tyrfing 5y agoThe Xeon exclusive for this generation is AMX, and I believe Sapphire Rapids has 2 AVX-512 pipelines (sorry, too early to remember the correct term) vs 1 on Alder Lake / Rocket Lake. Disabling it on the consumer chips is related to the heterogenous architecture, since E-cores don't have support. Nobody knows exactly why they decided to fuse it off to disable with E-cores turned off, my guess is because it isn't fully validated/tested (save money) and a very unusual config to start with. Sucks for the 50 people who wanted to run that one emulator, and "save money" is a pretty bad reason for a halo KS product. ECC is available on the consumer chips as of Alder Lake, it's supported with the W680 chipset.
- netizen-936824 5y agoTitle is a bit confusing. When using "L" for liter it must be capitalized, plus the mention of 70 liters is not in the actual title only the article itself
- jvanderbot 5y agoInteresting to see they fused off the avx512 set. You just can't run that kind of code on these. That jives with my experience with the 10?00K series in the Intel extreme compute element. I can glide cool at 3.5ghz x8 and get some thermal throttling up to 4.5x8, except when running avx512 workloads. Then it's much hotter.
- dtgriscom 5y agoThis seems wasteful and pointless. I have a compiling machine with an AMD Ryzen 7 3700X 3.6GHz 8-Core, the AMD cooler, an M.2 SSD, a relatively efficient PS, and a very simple video card. Draws a silent 25W total when idle; hums quietly at 125W when compiling on all sixteen threads. Switch this system back to water-cooled; what would it draw while idle? While fully loaded?
- greggsy 5y agoI’m a curmudgeon, but I still think the gaming industry has a lot to answer for in terms of power consumption. Steam even has a ‘Earth Day’ banner today, why should probably read: ‘turn off your PC’.