The NH-D15 is a direct, no interference, no problem fit on the Z97X-SLI according to the Noctua product page. And I've seen this board with all of the big air coolers on it at various times. The are no indicated memory interference issues listed as there are with some other motherboard models. It's a beast of a cooler. Probably the best air cooler you can buy. Bear in mind that the 7700k is a very hot running CPU, so don't expect to hit 5ghz without having a bit of silicon luck, or the good old Intel delid procedure. Without it, temps @ 5ghz have been known to go into the 90's, with with a big unit like the NH-D15. The DeltaT on the NH-D15 is only 2 C° lower than the U14S on a 85W Intel CPU. Sure the NH-D15 will give you more headroom when overclocking but the U14S has you covered for a mid-high OC too. but still, it's way better than most IMO Water coolers and other air coolers, even with a single fan, plus, you can run it with two fans, one in the Noctua NH-D15 (I know it is better, the best of them all actually) Dark Rock Pro 3 I will overclock an i7-3770K to 4.4Ghz or above. My Zalman 9900Nt is only properly handling 4.2Ghz and at the peak of the summer temperatures will rise another 5ºC or so. The question is, the Noctua NH-D15 might not fit with my G-Skill Trident X 2400Mhz. NOCTUA NH-D15. Price: $99.99. Website: NOCTUA. It seems like an eternity since I last reviewed a traditional air cooler here at TheOverclocker. Given the overwhelming success of AIO units in the medium to high end desktop markets, there’s perhaps no reason for any enthusiast to consider anything else. After all, these traditional CPU coolers If you're wondering why I don't just buy the NH-D15, it's because of RAM clearance issues. Now, with that out of the way, Noctua has an array of 120mm fans available on their product page; however, I am not sure which one is the best choice to attach to the NH-D15s, or if they are even all compatible with it. Based on the statistics that are Recently i purchased Noctua NH-D15 cpu cooler. Works fine, but because of RAM height and computer case height i'm unable to close side cover due to second fan sticking out too much. So i was thinking to buy another Noctua cooler (120x120x25) , possibly NF-F12 PWM, and put the 140mm fan that came with the cooler as front intake on pc chassis. With what is available right now, on paper, the d15 will outperform the u12a. Driedmangoh • 6 mo. ago. I’ve only seen better performance from the U12A at very low rpms (below 500rpm) due to the better static pressure of the A12x25. At higher rpms the D15 will definitely start creating separation from the U12A. But that's the case, not the board. So long as the case fits your nh-d15 you should be fine, it's a taller air cooler. My nh-d15s sticks out a bit further than a 3080 so even if the 4090 is a tad wider (mobo to side panel) than the 3080 should still fit. Just be sure to have ample room for airflow. And enough case depth to handle the card 13600K running hot on NH-D15S. I recently upgraded my PC from a 5820K with a GTX 980 to a 13600k with a GTx3090. I used the NH-D15s from the previous build, but had to the buy the adapter NM-i17XX MP83 in order for it to fit. I can't run ANY multithreaded synthetic benchmark without the 13600 thermal throttling around 10-15%. rToWYzR.