OK... so I have some new results. Promising results.
I'm at stock UEFI settings.
- VCORE/VCCIN/etc. stock
- Turbo ON
- Cores synced
- Batch: L421C128 (lets include the full batch# guys)
- 3.16.3 kernel (Fedora 20)
Load: Tested an ffmpeg 1080p h264 encode, uses all 8 cores at 100%
Intel stock cooler (properly applied, checked twice!)
Idle: 40C, 800mhz, 0.7v, 40% fan speed
Load: 100C, 4.4ghz, 100% fan speed (don't have a way to read voltage)
Zalman CNPS3900 Extreme with Noctua NT-H1 paste
Idle: 35C, 800mhz, 0.7v, 40% fan speed
Load: 75C, 4.4ghz, 100% fan speed
Instant improvement by cooler alone. The stock Intel cooler can in no way dissipate the rated TDP of the 4790k.
@allan_intel, the stock cooler is a serious problem and prohibits the advertised speed of the 4790k. Your customers should not have to buy a secondary cooler. Maybe you should have not included a cooler with this CPU.