I have an issue with my Nepton 280L not cooling my PC adequately.
Link to my RigBuilder page on overclock.net
Case: Lian-Li PC-T60B
PSU: ABS MJ1100
MOBO: ASUS Sabertooth Z97 MK2 (2012 Bios Rev.)
GFX : 2x 6970 + Accelero Extreme II Coolers
RAM: 2x 8GB A-Data XPG v2 2400mhz
OS HDD: Vertex 4
Storage HDD: HGST Ultrastar 2TB
CPU Cooler: Nepton 280L
Thermal Paste: Noctua NT-H1
Fan Config: Push+Pull Config on the Radiator, 2x Jet-Flo fans front mounted, 2x 120mm Akasa Viper Fans on the back side. Pump connected to CPU Fan Header. Jet-FLO fans connected to CPU_OPT Fan Header. Akasa Fans connected to other MB fan Headers.
Fan Speeds: Pump reports 6553 RPM, JET-FLO's spin up or down depending on heat, same with the Akasa's.
Radiatior is mounted on an optional front-mounted fan accessory kit for the T60B case.
Important Mobo Settings:
LLC: OFF (Level 1)
Core Ratio: Stock
CPU Voltage: 1.23V
Temp statistics AS-IS:
Regular Load (Gaming): 65-75C
Prime95 SmallFFT: 100C+
Intel XTU: 83-95C
Temperatures rise to extremely high temps rapidly, and eventually stabilize, generally fluctuation plus or minus up to ~10 degrees depending on the load type. The fluctuation is lower when gaming, and higher when using a synthetic stressing tool. Some loads, like Prime95's SmallFFT test can not be compensated for by the cooler, causing throttling within about 5 seconds of running the test.
To me, it feels like the CPU is sitting too low, or the water block is too high, and that adequate pressure can not be placed on the CPU in order to permit optimal heat transfer from the CPU to the water block. I have confirmed this every time I removed the water block, only a small portion of the block actually had any thermal paste on it from the CPU.
- Watching the installation video several times to ensure correct installation
- Re-mount water block copious amounts of times.
- Clean and Re-apply thermal paste copious amounts of times (Using both the spread method, and the Pea+Pressure method)
- Reverse Waterblock mounts so the brackets go up instead of down before going horizontal (Results in mount screws not being long enough, but tried with black spacers (still need to try without)
- Using and Not using the Black spacers for the mount screws
At this point I'm pretty much at a loss of what else to try, because I just don't seem to be getting much (or any) pressure at all on the CPU. It seems to be a compatibility issue with my MB at this point, or a failure of some kind of my part that I'm not seeing.
Worst of All, on my last install attempt, I sheared one of the mounting bolts, and ordered a new accessory kit as of yesterday (1/7/15) - but CM isn't shipping until 1/12/15 according to the website.
Needless to say, it's back to the stock cooler until I can get the parts and try mounting the brackets for the block upside down, without using the spacers to see if it will work for me that way.
Any suggestions are appreciated.