Seidon 240M - refill?

[FireCharge]

Bought my rig back at 2014, hosts a 4670K which was not overclocked until I swapped my old Scythe cooler for the Seidon 240M (which was on sale on 2015's Black Friday sale, that's my main reason for choosing it. Plus I hated my previous cooler). Ever since been running my CPU at 4.2GHz on 1.27v (yea I know a little bit overvoltage, but I don't have too much time to go at this, and I'm also looking to switch my terrible Z87-DS3H mobo).
Back when I got it I managed to get at around 30-37 degrees celsius on idle (OCed), and about 60-65 on full load. About a month ago I started noticing something else however, seeing the temps rise up to 40-45 degrees idle and ~70ish on high gaming load (around 73-75 stress tested). Since then I removed the cooler, swapped thermal paste (Using NT-H1 Noctua paste) and cleaned the fans and little bit of the rad (didn't have compressed air cans to clean it better so I did my best) but I don't see any change whatsoever.
Case is NZXT Phantom 410

Front fans are 2 NF-F12s, rad fans are 2 NF-P12s on pull (above rad pushing air through it to the outside, can't do anything else without modding the rad mount), have the stock case fans pulling air through the bottom and pushing air through the back. 

Controlling the fans via speedfan with pump at full speed.
Do I need a refill or something to get better temps?
Thanks

[belfouf]

ok so nice new thermal paste.

waterblock fans RPM is only 1300, it is low  (http://noctua.at/en/nf-p12/specification)

 

you could change them for high static pressure fans with wider PWM like 

https://www.ekwb.com/shop/ek-vardar-f3-120-1850rpm

http://www.corsair.com/fr-fr/air-series-sp120-high-performance-edition-high-static-pressure-120mm-fan

this will cool much more if needed

 

 

 

[FireCharge]

8 hours ago, belfouf said:

ok so nice new thermal paste.

waterblock fans RPM is only 1300, it is low  (http://noctua.at/en/nf-p12/specification)

 

you could change them for high static pressure fans with wider PWM like 

https://www.ekwb.com/shop/ek-vardar-f3-120-1850rpm

http://www.corsair.com/fr-fr/air-series-sp120-high-performance-edition-high-static-pressure-120mm-fan

this will cool much more if needed

 

 

 

Thanks for the suggestion.
First, the SP120s - if you look at actual specs - the P12s do a better job at full load whilst 15db quieter.

For the vardar, they do get a 15m3\h performance boost, but are 33% louder at 29.5db vs 19.5 of the p12... Still looking for quiet alongside performance and I'm not getting it here either way.

[belfouf]

9 hours ago, FireCharge said:

Thanks for the suggestion.
First, the SP120s - if you look at actual specs - the P12s do a better job at full load whilst 15db quieter.

For the vardar, they do get a 15m3\h performance boost, but are 33% louder at 29.5db vs 19.5 of the p12... Still looking for quiet alongside performance and I'm not getting it here either way.

at P12 full speed let's agree they do better than SP120 (although I have no idea), but don't forget that SP120 continue 75% further in speed / cooldown

 

if you care that much about cooling/ noise I advise you to choose your fans using these guides :

http://thermalbench.com/category/fans/

 

personally I use Nidec Gentle Typhoons 1850 in PWM to cool my waterblock buts it's a bit expensive and hard to find