So in Prime 95 with my overclock the cooler is really worked hard (the power the cpu is drawing is around 100w) but as the core temp comes up the fan goes up too, but the fan reaches its max but the cpu can still get hotter, but when i touch the heatsink i know that it isnt 80c or whatever the cpu temp is, its barely 35/40c and there isnt that much hot air coming out of the system. Is the CPU heatsink not on properly (every single CPU heatsink i have seen does this bouncing temp thing) but im sure that it was on tight (Noctua have a safety thing). I applied thermal paste (the normal dot in the center with the supplied thermal paste which is supposed to be really good). Does anyone else have this issue, where you are at 30/40c core temp idle but when you go under load (AVx load) the core temps skyrocket but the Heatsink doesnt get that hot because it is getting cooled by the fan.
Well, you have to understand it takes some time for the heat to fully circulate through the sink (not long but still, there's a time factor). Your core temps will shoot up as soon as they are under load. I would ensure that your thermal paste application was adequate/clean and reapply. How crazy is your overclock? Overclocks strongly amplify how hot your processor can get almost exponentially. If you're on air, a common, safe overclock doesn't exceed 0.3-0.4 GHz above what the processor came with.
3.5ghz stock but its on 4.5ghz, i set it to 4.0ghz to stop Prime 95 throttling it but under normal load its fine at 4.5ghz. My cooler is a Noctua NH-D14 with both fans, it does take time i know but it doesnt heat the heatsink that much.
Holy ba**sack that's an insane overclock! Even liquid cooled setups don't push more than +0.7GHz usually.
So... I guess my 4.8GHz experiment on a Hyper 212 Evo would blow your mind then, eh? Also, they make air coolers that are better than some budget AIOs. The Noctua NH-D14 air cooler will go toe to toe with a Corsair H80 liquid cooler. Something tells me that you don't quite understand how overclocking and CPU heat output works.
I've hit 5Ghz on a i7 3770k(3.5Ghz stock and 3.9Ghz stock boost) with a hyper 212+, and I probably could of gone more but I was thermal throttling while benchmarking.
Exactly, at that point you're not truly getting 5GHz because you're throttling. I do understand how it works. Do you daily that speed?
Absolutely not which is why I said it was an experiment. I daily 4.6GHz, I just haven't updated my signature in quite some time. I could daily 4.8, but it leads to system instability due to my CPU not being that great of a high overclocker, not heat. To put it into perspective, to get 4.8 I had to shove 1.35V into the core, which isn't good for it at all, and my Hyper 212 could still keep up (barely, not stress testing) and it's a $30 cooler. EDIT: I've got it stress testing right now to generate some heat. 4.6GHz, 1.23V on the core View attachment 216514 I'd like for you to note how it's running at about 65-75 degrees on, once again, a Hyper 212 Evo with Corsair SP120 fans in push/pull, with a 1.1GHz overclock. By your logic, it should have melted into a blob of silicon and gold by now. Also, I hate doing this. Under a load more stressful than gaming the whole system becomes highly unstable because my particular silicon isn't all that great, it's really more happy around 4.3 GHz. But, again, that is platform related, and not heat.
Well to get back to the original question.... When your temps are high are the heat pipes near the CPU block any hotter? Also how much airflow goes through your case because if there is high airflow the air coming out would likely not feel like any heat is coming from the CUP heat sink.
The alu-cooling fins will never get that hot. Heat has long dissipated near the edges where you touch it. Other than that, the copper pipes (sometimes internal) thats where the heat is, and they can only transfer so much heat at one time which causes heat to build up anyway.
that is just not true. many modern cpu's can run significant overclocks on air. im running my i5 4690k at a comfortable 4.4 Ghz (stock 3.5) at only 1.17v and a maximum of 70°C on prime95. i could probably push it to 4.5 - 4.6 and still get acceptable temps.
