CrystalMark 2004R3 => 341127CINEBENCH R11.5CPU => 9.74 ptsCPU(Single Core) => 2.03 ptsWindows experience index - CPU 7.8PCMark Vantage => 24126After overclocking, the performance is increased by about 30% at the single-core threading, and by over 40% at the multi-core threading, which is quite satisfactory.The 5GHz which is the performance of 2700K should be the acme of the 4 Cores CPU on the market currently.In the future, it may be surpassed by Sandy Bridge-E or Ivy Bridge to be released next year which uses its own LGA 2011 platform.DRAM bandwidth testDDR3 1866.4 CL8 10-9-27 1TADIA64 Memory Read - 22805 MB/sSandra Memory Bandwidth - 24680 MB/sMaXXMEM Memory-Copy - 25963 MB/sThe Sandy Bridge framework improves the bandwidth of DRAM a lot, thus a dual-channel platform can already compete with the performance of a tri-channel platform of X58.Furthermore, the bandwidth improvement for DDR3 is in clock rate, there is 10-20% bandwidth improvement after being increased from 1600 to 1866.The high bandwidth performance for LGA 1155 is helpful to improvement for system performance to some extent.Temperature performance (about 26 DEG C at room temperature)System standby- 36~42CPU full speed - 76~80Intel Burn Test v2.4，Stress Level MaximumThe temperature increases a little when system standby because of overclocking, which is substantially within an acceptable range.The temperature increases a lot at full speed, which will also happen to the Sandy Bridge framework at the high clock rate of 5 GHz.Therefore, it is quite important to lower the temperature which is also a challenge for the capability of the heat sinks.The temperature is about 90 DEG C when top-level air cooling is employed previously.The hydro-cooling performance of CORSAIR H80 is excellent, in which the temperature is below 80.It is an acceptable overclocking temperature for most users.For BIOSTAR, the voltage control of CPU can be strengthened, 1.512V at standby and 1.416V at full speed are helpful to stability after overclocking, but it fluctuates strongly.Power consumption testNo software running on OS desktop - 103WCPU full speed- 239WAfter powering off the C1E, the power consumption after overclocking is increased a lot simultaneously, which it is over 100W at standby.The power consumption will be increased by about 136 W at full speed.From the clock rate and performance of 5 GHz, the power consumption is a little higher than 95 W which is the official preset data.However, compared with the high power consumption of competitor’s 32 nm 4Cores/8Cores, the power consumption for 32nm process of Intel is excellent.It is necessary to select two chipsets, i.e., P67/Z68 and the like to play the overclocking performance of the three frequency-unlocked CPU, i.e., 2500K、2600K and latest 2700K.P67 has lowered to a reasonable price on the market, so that it is a MB choice with light economic burden for consumers with limited budgets.But Z68 has the primary functions of two chipsets at the same time, i.e., overclocking frequency multiplication of CPU of P67 and display output of H67,so that it is the chipset of LGA 1155 that has the most comprehensive functions currently.Unlike LGA 1156 or LGA 775 at a quite high price when just released in one year, Z68 of the LGA 1155 platform soon after being put on the market has a reasonable price.Additionally, Z68 has exclusive SSD acceleration, so that it is a good function for accelerating the performance of system for the users with small-capacity SSD on hands.If selected by myself, I prefer to directly selecting Z68 MB optimally through adding some budgets.The price of TZ68K+ of BIOSTAR is about the same as that of P67 of the other brands; from this part, the value of C/P is obviously enhanced.With the overclocking capability of a rather high level and the advantages of supporting UEFI user interface and eight-phase power supply, the Z68 should be taken into account.If the number of USB 2.0 can be increased or the voltage of CPU can be suppressed, it will be a valuable high-performance Z68 MB.Intel will release 2700K in Q4, which should be used to replace 2600K that is the highest-level CPU of LGA 1155 currently.Although, 2700K is only increased by 100 MHz, the price is only tens of dollars higher according to information on Internet.The voltage for overclocking at 5GHz is about the same as that for 2600K which is shared by windwithme, and is about 1.4V.At Nov., Intel will release a higher level LGA 2011 platform, in which the configuration of X79 and CPU will be much more expensive than that of 2700K and Z68.On the current market, the middle-high level platform with higher value of C/P consists of several combinations, i.e., Z68+2500K or 2600K/2700K.Personally, I think it is unnecessary for the users who already have 2600K to upgrade, and it would be better for those who want to buy 2600K recently to wait the market information of 2700K.The above is about sharing my experience for overclocking of i7-2700K, which is provided for users in need as references.This article is also post in my own blog WIND3C Welcome your visit.