Not the best, but they are more than OK....Nocs are in the top 3 ...
but you have better fans in your case already.... the ones that came with it. The top fans available are the Phanteks and Silent Wing 3s. Here they took the Phanteks fans off of a Noctua Cooler and replaced them with Phanteks (the ones that came with your case) ... the CPU temps dropped a whopping 6C at same rpm.
View attachment 167517
Also, see the chart at ling below, have to scroll a lot to bottom of page.
140 mm fans from Noctua, Phanteks, and Xigmatek battle in our latest fan roundup with one emerging as a clear winner in both thermal performance and acoustics. May 21, 2013 by Lawrence Lee Last month we staged an epic shoot-out among some popular 120 mm fans. Some great sounding fans emerged but...
silentpcreview.com
"The Phanteks PH-F140HP/TS is the clear winner in every respect. It edged out the new Noctuas every step of the way, delivering the best overall results of any fan we’ve tested thus far. To top it off, it had cleanest, smoothest sound of all the new fans in this roundup. If we had to start from scratch, this might be our new reference model. "
By sticking with the Phanteks fans you also remain compatible w/ your case's LED control system.
If all ya want is RGB since ya have the one of the 2 best fan models available today, this will be a less expensive alternative
Buy Phanteks PH-FF120RGBP Halos RGB Fan Frame – High density LEDs, RGB, 120mm fan mounting with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com
Buy Phanteks PH-FF140RGBP Halos RGB Fan Frame – High density LEDs, RGB, 140mm fan mounting with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com