I assume that the 80c your talking about is just temp spikes, right?
Nope, steady-state under all-core loads or heavy single-core loads. A single CCD consuming 120-130W gets hot. Well, with my current config it sits around 75°C, at ~4.55GHz/120W doing things like video transcoding. At stock it ran somewhere between 80 and 85 - though I've also changed my fan/pump profile since then. The reason is pretty simple: the Aquanaut is a reverse-flow water block, i.e. the DDC pump doesn't push water through the microfins, but sucks them out through it. That leads to relatively poor utilization of the cold plate, and thus high temps. My loop is configured for silence first, fans are controlled only by water temperatures and not component temperatures, which when coupled with low pump speeds means the CPU is allowed to run hot. Though I've configured Aquasuite to switch over to a 100% fan speed/60% pump PWM (which is essentially 100% speed - its PWM response is weird) profile if CPU load is above 90% for more than 10 seconds. That's what nets me temperatures in the mid 70s under full load - though IIRC Handbrake uses AVX. Haven't tested any lighter all-core loads after tweaking.
This is what a pretty typical desktop usage scenario looks like for me:
Yes, the intake is quite hot, they've just started ramping up the central heating in my building, and it's taking some time getting the radiators dialed in. Typical fall
I think 80°C is definitely biofouling territory. Whoever runs water coolers at that temperature is asking for it.
If your water is 80°C you're definitely not getting biofouling, unless you've sampled some extremophiles from your nearest volcanic sea floor vent. Most bacteria and other organisms die at around 60°C. The problem is that your pump, tubing, fittings, o-rings and other components wouldn't do well under that temperature for long. Plus the thermal transfer between water and a hotter component would be trash with just a 10-20°C delta between them. Also, where did you get 80°C liquid temps from?
That is how you get a dead system long term.
Lolwut? Show me proof of a CPU that died from runnning at 80°C with a TjMax of 95-100 and I'll give you $100. CPU/APU/GPU silicon has no problem with those types of temperatures unless there is something
seriously wrong with it. Heck, most laptops
idle in that temperature range (as that's their only way of being reasonably silent at idle). And while laptops do fail often, the CPUs are
not what typically fails - that's mostly batteries or other components failing due to
them not handling high temperatures well, not the CPU.
This was a reply to that. You need to dissociate between cpu life and loop life which is heavily compromised by temperature.
Yet you were the one bringing loop life into this, after I talked about my CPU temperature?
How much money you spend is not in direct association with what you get out of it. Hobbies can be utilities. PC can be free heating, believe me it just needs a good and efficient cooler and you have a cozy radiator with led lights.
Eeeh ... unless you're running some crazy HEDT CPU and a few GPUs that heating is negligible. Most electric heaters are 1000-2000W if they are meant to produce noticeable heat in anything but a very small room. A PC outputting 3-400W does obviously deliver
some heat, but it's really not a lot. And calling it
free is also a bit of a stretch, given that a $100 high quality space heater can do a lot more for a lot less.