Intel i7-5775C Prime95 temps

[RNvali]

Hi,
I was wondering if my CPU temps are fine with stock clocks and voltages. I recently upgraded my CPU from i3-4330 to Intel i7-5775C and ran Prime 95 v2.85 for about an hour. I monitored my temps with HWinfo64 v5.10.

System setup:
Case: Phanteks Enthoo Evolv mATX case with stock case fans (200mm intake, 140mm exhaust)
Mobo: MSI Z97M Gaming
CPU cooling (air): Noctua NH-U12S
TIM: Noctua NT-H1
Dedicated GPU (Asus Strix 980 GTX)
Ambient: ~21C
Idle temps: 31-32C
Fan control scheme in BIOS: Max both case fans speed at 65C, max CPU fan speed at 70C
No dust in the case or room (Datavac ED500 duster, Miele HEPA vacuum, Daikin air purifier)

Prime 95 maximum core temps (HWinfo64): 69-73C

What do you think, is that max 73C fine for this CPU with my setup, or should I consider reapplying thermal paste and reseating the heatsink? According to following post the max core temp for Broadwell is 76C with just stock cooler. I would presume NH-U12S should have bigger than just 3C difference compared to the stock cooler. http://www.tomshardware.co.uk/forum/id-1800828/intel-temperature-guide.html

Thanks in advance for any thoughts and input. I highly appreciate it.

 

[gotovato]

You're using a bad version of prime95. Retest with version 26.6. Anything newer is terrible for the newer intel chips.

 

[GhislainG]

73°C on Prime 95 v2.85 is excellent; it proves your system is very well cooled. It would hit 100°C and throttle with the stock cooler. There are no bad versions of Prime95; however there are improperly cooled CPUs. Using applications that take advantage of the new instructions also cause more heat.

 

[RNvali]

@GhislainG
Thanks for your reply. That's good info.

You're using a bad version of prime95. Retest with version 26.6. Anything newer is terrible for the newer intel chips.

Thank you for your reply. I now realize that should have read that guide more carefully. 🙁 Well, hopefully someone benefits of my core temp info. This CPU seems quite rare after all.
I retested with version 26.6. using only the Small FFT test for about 20 minutes. My maximum core temps seemed to settle at 56-59C. I might even try OC'ing to around 4GHz if that is possible with stock voltage. I don't like the idea of raising the voltage. I actually would rather undervolt to keep the temps in check.

 

[GhislainG]

The guide is best suited to overclockers who need/want to achieve maximum frequencies for their gaming systems. Those systems usually throttle when running Prime95 28.5 or newer; therefore the solution is to avoid using it which is fine since games are not using the new instructions.