Yes, Noctua fans are the best for cooling / decibel but can you buy a Noctua for £2 ( albeit prices have risen now LOL... ) each & free shipping?.. IMSMR, Noctua fans would have costed 4-5 times more in the used markets!.. I guess the price hike was a pricing error for that evil bay sale LOL, they must have thought they wouldn't sell for a more higher asking price, I assume they guessed wrong!.. LOL...

Off topic but.. what are the best 140mm noctua fans in terms of quietness? Looking at changing my 2 top mounted exhaust fans as they are pretty load at full chat (antec twocool).

These are loud and don't move any air... Noctua or be quiet are the only fans I'll buy. I hear the new fractal ones are good.

in my opinion, the final temperature min/max it is also determined by how well the case is been set up with the cooling or the rest of the fans and corsair are good even so I do not buy them unless provided with the device.
deal ended price gone up, I think it was a misprice after all

Showing as £4.50

Gone up to £4.50 now...

I've used a H100i, H100i V2 and a H80i V2 all with Noctua fans and I've seen drops between 3-6 degrees celsius also they are so much quieter. You can run a Noctua NF-F12 flat out without hearing it over the noise even a quiet GPU will make under load. Noise and longevity is worth it for me, I've been through so many fans over the years.

Also Corsair fans are complete garbage.

As an amateur builder myself I do appreciate your comments and obviously makes sense but here we are talking about a good branded fan which at the time they used to cost much more than £2 and the price is what make a huge difference in what we should buy or not, even rubbish from china would cost more apart from the fact that the good one are also made in rubbish factories in china. As an example the fans that do come with the older corsair h110 280mm radiators are ratling if used to pushair from the bottom to rise ( it does not in any other position), I must say that corsair was so kind to send me 4 fans for 2 radiators from the latest radiator range and I do not get the same problem but obviously the are still noisy if used at max speed or even there somewhere in the middle speeds. I know I can use this fan for the purpose as I tried my low speed non high pressure arctic 140mm and can tell you that they still work ok with radiators, in reality radiators are not like air cooled coolers where air pressure is needed because of the thickness of the cooler. If I run my existing fans at minimum or maximum it is unnoticeable the benefit unless we run heat tests but even so the difference would be 2 or 3 minus Celsius from min to max speed. I said I want to use them for push and pull but can tell you that there is not even need for that. Anyway, at worse can surely be used happily for the cases. The case could run much cooler if people would take care to position enough fans inside it and in the right manner and therefore the cpu and gpu would greatly benefit a lot, instead many do get it wrong by spending fortunes to buy the most expensive coolers and even radiators for the gpu's which are not needed at all. Well if I use radiators it is just because I wanted them apart from the fact that I would spend that kind of money if they come on a sale of course.

I've build hundreds of PCs over the years. Nothing compares to Noctua fans, even flat out you can barely hear the ones in my system (mITX watercooled gaming setup).

They also make proper fans for nearly every application, for example when I moved to watercooling for my gaming rig I could easily buy the focused flow ones for the radiator (higher static pressure) but you can easily buy the ones that aren't focused. The only thing I can't buy from them right now is a 200mm fan, but they're working on one.

Granted you'll not be buying any Noctua fan for £2, but cheap fans aren't worth it. Noctua fans will probably outlive most people.

https://www.quietpc.com/nf-p14s-redux-900?gclid=CPeSrbzng80CFUyeGwodxwcH1w
the cheapest I can find on the quiet low speed side. Better and faster but noisy are around £20 each

Noctua or nothing.

thank you, worth to try for a very quiet push and pull on 280mm radiators despite the fact that they are not the proper one. I keep the proper one at minimum after all, lol.

replaced my cryorig fans with a couple of these. Much quieter.

Great just kitted out my phantom 410 with some arctic 12 fans.... These would have been great on the side and top. Heat anyways.

If these are the fans from the NZXT h440 then they're awful

Worth a try, thanks.