Tostr4

You won't get 100 HM/s just by running some program. Mining takes some study. I have no experience with 3080's, and petty much no Nvidia cards in general. I mostly buy used amd cards like the RX 480 570 580 or the Vega's. If you wanna put your card to the test for a prolonged time, I advise you to try some 'Folding at Home'. And than you can compare your results with other 3080 owners. Basic mining, without changing the BIOS, does not alter your GPU, and will not decrease performance. You can allways let it run a little on Nicehash, but I would strongly advise against it, if you use that PC for daily use. Fraudulent software may ruin your day, and your bank account, etc.

Congratz on obtaining a 3080 (100MH/s) card, btw.

The components that heat up above 60°C will wear out sooner, and may become unstable. But I believe that the team of engineers foresaw this, and mounted high end components, that resist this deterioration better. I'm not hearing much complaints about fast wear from the mining community.

From a miners' experience: the 3000 series run very hot on de VRAM's. The 3090 run at 110-120°C in some miners. Not mine; don't have 3090's. So temps are not unusual, but I woudn't consider them healty neither.

You can still mine Ether if you're fast enough, but that will also be non profitable in 1 or 2 years. Bitcoin mining is now strictly for ASIC farms, located in regions with very cheap or free power. But in short: Yes, you're too late.

No isolation. The oil should be non (very low) conductive. Just make the plunge. No HDD's no optical drives. Fans wil run in oil, but slower.

Bigger iz allways better:

Don't run a regular waterpump on oil ! I have killed 2 pumps in order to gather this information. Check out my build for some inspiration. I used a digital thermostat from a refrigerator to power my gear pump on and of. Just finished the folding month at a steady 40°C. Pump runs about 1 minute every 30 minutes at 30% PWM. Edit: I just realized you probably allready read 'Oil dip'. The Amazon thermostat will do, but you need a oil transfer pump like this https://www.wish.com/product/5dfc82d066a2540b025f2486?from_ad=goog_shopping&_display_country_code=BE&_force_currency_code=EUR&pid=googleadwords_int&c={campaignId}&ad_cid=5dfc82d066a2540b025f2486&ad_cc=BE&ad_lang=NL&ad_curr=EUR&ad_price=19.00&hide_login_modal=true&share=web rather that the standard computer parts pumps. And better run it on an external power supply and a manual PWM controller.

You can plug a 3-pin connector in a 4-pin socket. The rectangular cutout corresponds. I believe that the difference between 3-pin and 4-pin is that the 4th is a tacho feedback, so the speed of the fan can be regulated better. The 3-pin fan will be puls-width-modulated, but you won't be able to set a certain speed in rpm. just a percentage.

Am I the only one wondering why there is so much resemblance between the 3 GPU's from Nvidia and the 3 GPU's from AMD? They all 3 roughly match each other in performance, while structurally beeing entirely different. And the one month difference in launch date can't simply be enough time for AMD to alter their specs to match those of Team Green. My only logic conclusion is that both companies have been watching each other very closely, trough espionage I hope. Because if they didn't, that would mean that they just 'worked together a little' to sell us electronic devises that cost roughly 25€ to produce, but sell at 500 - 1500 €.

If you watch comparison reviews, the difference between the range of 'high end' pastes is minimal, and variations are more influenced by mounting errors that the kind of paste used.

With the GPU releases from both Nvidia and AMD I suggest to wait at least one more week before coosing a GPU all together. I have bought a GTX 1660 in april, and it was good value for money, but I wouldn't buy it anymore under these circumstances. If you can't wait to assemble, buy you GPU second hand (the 20xx series will spawn very fast on the used market when the 30xx series roll out together with the AMD's) and wait 6 months for stable drivers before you buy your own 30xx or Big Navi.

I can also recommend the asrock B450. Decent value for money without any fancy esthetics or heatsinks.

Keeping it running without leaks.

Beer tap cooler: https://en.calameo.com/read/0026057501350e843b0f3 Ready to use at 4°C. If you upgrade, you might even get subzero.