aubsxc Offline Upload & Sell: Off
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I don't have your exact motherboard, but yes, set the physical switch on the board to disable which should be the default setting.
Your i5 4670K is unlocked and should clock nicely on the Z97 board. The key to overclocking is to tune the CPU performance and balance it against the thermal load. With a moderate overclock in the range of 4.2 to 4.4 GHz with a core voltage in the range of 1.15 to 1.25V there is virtually no fear of damage or degradation of the CPU over its useful life (4 years typical). I have been overclocking my processors for 17 years and spend a lot of time browsing computer hardware forums and have never experienced any issues related to moderate overclocking, or read of any issues experienced by others.
You WILL NEED an aftermarket CPU cooler to overclock. The stock Intel cooler can't handle the thermal load for the stock chip (84W?) when running stress tests (it will throttle in a few minutes when the temperature hits 100deg C), much less running the CPU overclocked. You can pick up a nice cooler like the Cryorig H7
http://www.newegg.com/Product/Product.aspx?Item=9SIA4UF2DZ6565
for about $35 from newegg, or an all-in-one water cooled unit like a Corsair H55 or H60 for about $55 to $60. These coolers will allow you to run the CPU around 4.2GHz using 80 to 90W under load and capping out at a peak draw of 115 to 120W under stress testing using AVX instruction sets. I would recommend an aftermarket cooler even if you run the CPU at stock speed.
For your 4670K, overclocking is as easy as doing the following:
Enter the BIOS/UEFI using the DEL or F2 key when the system posts
Select the ADVANCED MODE if the BIOS enters the simple mode by default (usually found in the top right corner on Asus boards)
Select the XMP profile for your memory (the board will automatically select the appropriate timings based on the XMP data stored in the memory module). You will NOT be overclocking the memory.
Set the Clockspeed Multiplier to "All Cores" or "per Core"
With Per Core, you can select multipliers of 44, 43, 42, and 42 for simultaneous loading on 1, 2, 3 and 4 cores, respectively
With all cores, set the multiplier to 42
This will allow the CPU to run one or more cores at the assigned multipliers (instead of the default values) when they are loaded (4.2 to 4.4 GHz instead of 3.4 GHz which is default)
Leave the Base Clock/Strap at 100MHz
For core voltage, select "Adaptive" and start out with an offset of +0.04. You can increase or decrease the offset depending on the quality of your chip. The goal is to find the lowest voltage at which the system will remain stable when fully loaded. More on that later.
Set the DRAM Voltage manually to be slightly higher than the specified manufacturer voltage (say 1.53V if the manufacturer specs the ram at 1.5V)
Optional: Under the Thermal Controls (or similar submenu), set a maximum Extended CPU Power Draw to 115 or 120W. This will make sure the CPU will never pull more power than the limit.
Hit F10 to save and exit. In Windows:
Download the following free software:
CPUID HWMONITOR (allows you to monitor operating speed, temperatures and thermal load)
Prime95 (stress test)
Asus AISuite III - install at least the Fan Controller Module, which will allow you to setup very fine grained controls for all the system and CPU fans which are connected to the motherboard.
Run Prime95 (default options are fine) and monitor the CPU core temperatures and power draw in HWMONITOR. If Prime95 runs stable for 4 to 6 hours, you have a system that should be stable for pretty anything you do with the system. If the core temperatures are good (never exceed 85deg C), you are done. If the temperatures exceed 85 to 90 deg C, you don't have sufficient cooling, and you might want to reduce the core multiplier a notch (drop to 40 or 41) and/or drop the Core Voltage Offset slightly (say to +0.03) in the UEFI to drop the temperatures.
If the program crashes (or Windows crashes), restart, and in the BIOS, adjust the Voltage Offset value upwards in small increments. Maybe try +0.06 to +0.08. This should work for the 42 multiplier with most processors. Rerun Prime95 until you find the settings you are comfortable with (voltage less than 1.3V under load, peak temperature under 85degC ).
In the UEFI, leave the Power States enabled, so the processor can throttle down to much lower voltages and speed when it is not loaded heavily.
It is a lot simpler than it sounds once you have done it a few times. Modern Intel processors are trivially easy to overclock, unlike say 10 years ago when things were more challenging. With a modest overclock to 4.2GHz, you will achieve a 15 to 20% increase in performance over stock. For CPU bound software like LR and PS, the bump is totally worth the little bit of effort it takes to get there.
Good luck, and send me a PM or post here if you have any questions.
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