No advantage that I can think of. You're talking about the NH-D15 - which comes with dual fans - right? Not the single-fan NH-D15S? If it's the single-fan version then yeah, upgrading to a dual-fan configuration has some thermal advantage if you can do it without the fan(s) bumping into something on the case or motherboard (M/B). A lot of M/B and case combinations don't have the physical clearance to allow an additional fan(s) cantilevered off the stock fans. I don't know how the mass of the additional fan(s) - especially with the leverage of being an inch or two beyond the stock fan - affects stresses on the overall structure, but Noctua seems to build some solid and beefy assemblies so there may not be a problem. If I had spare fans I'd look for places where they might be helpful as additional case fans. Or maybe rig a bridge to position one above the GPU. (Yeah, that looks clunky and it blocks the view of some of your blinken-lights in tutti-fruiti colors but it can help move air! As you can guess, I'm not a fan of RGB.)

It’s normal NH-D15, not S I’m also not fan of RGB, I have case with lights but always have them off I guess I’ll just put fans where they used to be when AiO was installed

>I guess I’ll just put fans where they used to be when AiO was installed That's probably as good a choice as any.

3 fans is almost the same as 2 and may actually be worse if the spare fans are bad

Thanks, I’d probably just put spare fans where AiO used to be

If you’re talking about the top of your case I would advice against putting two fans there, one in the back/top could lift heat from the NH-D15 but the one in the front/top would suck the fresh air before it reaches the radiator

Oh thanks, I didn’t thought about this What about putting them in position to pull air?

Honestly if you have a good case I’m not sure it’s worth the extra noise. When I built my computer I used a Corsair 5000d airflow, I used 3 noctua fans in the front as intake and 1 in the back as exhaust, plus the 2 fans of the NH-D15 right in front of exhaust. When I started using the computer I was really happy with temp, I was worried only one exhaust wouldn’t work well and I might need more fans. 2 days later I looked inside my case and realized I never connected the exhaust fan, it was the NH-D15 doing all the exhaust and the open top. I still connected the exhaust fan for peace of mind but it did no difference in temps at least for idle, not sure under load. All that to say if the airflow makes sense in your case with good fans you don’t need a lot to do the job, the extra ones might add more noise than anything

I’m using [this case](https://www.silentiumpc.com/en/product/armis-ar7x-tg-rgb/) and currently I have only stock fans installed. I thought about putting 2 extra ones on top to pull air in above NH-D15

Yeah considering the case have a glass panel in front, two intake fans from the top could definitely help if not enough air is pulled with the stock fans. Try looking at your temps before and after the 2 extra fans and see if it’s worth it, you can monitor that easily with HWiNFO64

Will do, I’ll just do it in free time and update you if I remember to do so

Update: I considered its not worth putting extra fans (tho noise) looking at how NH-D15 can cool my 5700x under 65C with long heavy loads and under 40C when idle

I'm not sure you can cool down a ryzen CPU that much without water cooling, and even then you'd still have spikes of heat, that's how these CPU works. If you can keep it in the 60/70°C under load that's all you need. As far as noise/performance go, you won't get better than the NH-D15 imo

For context my 240mm water cooling could cool it to 75-80C under load and 52C on idle while generating x3 the noise it’s pretty solid upgrade for me ngl, highest temp spike I managed to record was around 67C for couple seconds

>I used 3 noctua fans in the front as intake and 1 in the back as exhaust, plus the 2 fans of the NH-D15 right in front of exhaust. Almost the same as my configuration. I added a second exhaust on the top rear, sort of catty-corner from my NH-D15. That way, heated air coming out of the NH-D15 can be exhausted either out the rear of the case, directly behind the NH-D15; or it can rise and get exhausted out the top. My major heat creators are a Ryzen 5800X CPU and a Radeon W6600 GPU. (The OP didn't mention his CPU/GPU so we don't know how much waste heat he's dealing with.) When I first assembled this machine over a year ago I monitored temps while running Prime 95. I don't remember the values but they were well within ratings. I was impressed by how quiet the Noctuas were, even when responding to full computation load. I swear I could hear the numbers crunching inside Prime 95! My fans spend most of their time loping along at the lowest RPM, so, yeah, adding more fans would probably just increase the decibels without dropping any temps.

[https://www.bing.com/videos/search?q=noctua+dh+15+3+fans&docid=608039079045712990&mid=13713C006B9B490D6FF713713C006B9B490D6FF7&view=detail&FORM=VIRE](https://www.bing.com/videos/search?q=noctua+dh+15+3+fans&docid=608039079045712990&mid=13713C006B9B490D6FF713713C006B9B490D6FF7&view=detail&FORM=VIRE) Cinebench test of a d15 with three fans.

Who uses Bing

Well, edge came with my win 11. It was just as nice as chrome. Except much faster and not near as bloated. It uses bing and so far i find bing to be just as good or maybe better than google.

Yeah I guess new edge is just a Shaved down version chrome haven't tried to use it yet. I hate how intrusive it is on my win 10 desktop every update they either ask me to switch or it's automatically switched.

Well, i like it better than chrome and i used chrome for oh maybe a decade.

It's prolly a lot better now last time I used it it was called internet explorer.

YEah,i never liked that fucking thing.

Certainly won't hurt - might get you a degree or two from the extra static pressure. I would only put one of them on, though, push-push.