blackweb Posted January 21, 2016 Share Posted January 21, 2016 My system: Asus Maximus VIII Hero (1001 Bios) i7 6700K Corsair Vengeance LPX DDR4 2800 Corsair H80i Cooler 2xAsus Strix GTX 970 SLI (1279 GPU Boost, 7010 Memory Clock) Corsair ax860i PSU Corsair 230T Case 4xCorsair 120mm Red LED High Static Pressure Case Fans - 2 front, 1 pull me bottom, 1 push me top Asus BDR Internal Samsung 840 EVO 1TB SSD Asus ROG Swift WQHD 1440p Monitor Nvidia 61.43 Driver I have been reading a lot about overclocking the i7 6700K. I have found two good guides: http://www.overclock.net/t/1570313/skylake-overclocking-guide-with-statistics http://rog.asus.com/454262015/overclocking/guide-overclocking-core-i7-6700k-on-the-maximus-viii-extreme/ This spreadsheet is very useful: https://docs.google.com/spreadsheets/d/1wQwYMGsSnMpKxrEesNVUSoP7hGykFWw1ygJsxwx64e8/edit#gid=0 Most guides involve setting voltages. I have achieved a stable 4.6 or 4.8 GHz overclock without setting any voltages except through the XMP memory profile. I let the BIOS handle managing voltages as much as possible. I have not seen this approach recommended anywhere so I am posting it here. The settings are fairly simple. 1. Enter the BIOS setup. 2. Hit F5 to load the BIOS defaults. 3. In the Tweaker set the AI Overclock Tuner to XMP and select the default XMP profile for your memory. 4. The BCLK should be 100, leave it at that. 5. Set the CPU Ratio to 46. 6. Make sure your DRAM Frequency matches the XMP profile. 7. Set TPU to TPU II if you have liquid cooling. Everything else should be left at default or Auto. Don't set any voltages. The XMP Profile will set the correct DRAM voltage. Reboot to test your overclock. You may want to run RealBench to test system stability and performance. I have pushed my overclock to 4.8 GHZ and XMP 3000 using this technique and found my system to be fast and stable. At 48/XMP 3000 your system will start to get warm. If you dont have good cooling, dont go there. Use RealBench to check your cooling effectiveness. I strongly suggest letting Q-Fan control manage your fans for you. At 46/3000 I got the following Fire Strike Extreme score: http://www.3dmark.com/fs/7134987 I also ran the RealBench, Valley and Heaven Benchmarks. My RealBench score was 81790. I will post more benchmark results later. I may go back up to 48/3000 but I just upgraded my video cards and I am being careful about heat and power consumption. To sum up: 1. Set BIOS defaults. 2. Set XMP Profile. 3. Set CPU Ratio. 4. Set TPU to TPU II if you have liquid cooling. I hope this helps! Benchmark scores 46/2800: 3D Mark Run Primary Tests Unigine Heaven Benchmark 4.0 FPS: 72.6 Score: 1829 Min FPS: 32.1 Max FPS: 149.0 System Platform: Windows NT 6.2 (build 9200) 64bit CPU model: Intel® Core i7-6700K CPU @ 4.00GHz (4007MHz) x4 GPU model: NVIDIA GeForce GTX 980 10.18.13.6143 (4095MB) x2 Settings Render: Direct3D11 Mode: 2560x1440 8xAA fullscreen Preset Custom Quality: Ultra Tessellation: Extreme Unigine Valley Benchmark 1.0 FPS: 74.9 Score: 3134 Min FPS: 36.3 Max FPS: 142.9 System Platform: Windows 8 (build 9200) 64bit CPU model: Intel® Core i7-6700K CPU @ 4.00GHz (4007MHz) x4 GPU model: NVIDIA GeForce GTX 980 10.18.13.6143 (4095MB) x2 Settings Render: Direct3D11 Mode: 2560x1440 8xAA fullscreen Preset Custom Quality: Ultra Update: I have just made the following upgrades: Corsair Vengeance C70 case 3x Cougar 120 mm fans to replace the Corsair case fans Corsair AX1200i Power Supply Corsair H100i GTX Liquid Cooler My system is running much cooler. The AX1200i/H100i GTX combination makes a huge difference in overclockability and stability. My system boots faster, runs much cooler and is much easier to overclock. I have now achieved the following stable overclock: XMP 3000 Overclock Profile 48 Multiplier 100 BCLK TPU II 2x Strix 980 @1299 All other settings Auto. 4.8 GHz overclock. 10170 Firestrike Extreme @QHD score. Stable through hours of ultra settings gaming @QHD. There is one major caveat. The Balanced or Performance profile in CorsairLink in order to achieve stability. Quiet is not sufficient. The i7 6700k is very sensitive to heat at high mulipliers or clock rates. I hope this helps :) Link to comment Share on other sites More sharing options...
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