Intel Core i7 Overclocking: 130 Watt Speed Limit Overclocking is very different on the Core i7. Unlike the Core 2 or Pentium D processors, the Core i7 CPU can monitor the current it draws as well as its power consumption—if it exceeds a certain level, the processor automatically reduces its clock speed. Intel calls this feature "Overspeed Protection." The limits hard-wired into the core are 100 A and 130 watts. Only the Extreme Edition allows the user to increase these values as they like, effectively circumventing the protection mechanism altogether. Thermal power loss rises especially quickly when the core voltage is increased. Thus, it is entirely possible that a lower model Core i7 may offer excellent overclocking potential, but it will be constrained by the Overspeed Protection feature when its power dissipation triggers it. Obviously, Intel wants to prevent customers from buying an inexpensive processor and then overclocking it to very high or even extreme levels. Apparently, Intel has realized that the good overclocking potential of its processors has led ambitious users to choose less expensive models, relegating the faster (and more expensive) CPUs to the sidelines. http://www.tomshardware.com/reviews/...em,2057-7.html |
Tom's Hardware's Chris Angelini - "Intel has added an Overspeed Protection to its Core i7 processors, keeping them from exceeding 130W or 100A. The company says it’s a safeguard in environments where that much power or current could result in a problem. The workaround is a BIOS switch. Overclockers will want to disable it before trying their hand at faster frequencies."http://www.tomshardware.com/reviews/...i7%2C2063.html Intel's Francois Piednoel - "I am to be VERY VERY clear, there is not Overspeed Protection, we have a BIOS setting to bypass the PCU control of Current and Power. On smackover, it is call "CPU VR Current Limit Override", and it will allow you to bypass the thermal and courant limites on the Core i7 920 ans 940. Who ever claim the otherway around did not read the specifications enough hehehhe http://www.xtremesystems.org/forums/...&postcount=102 |
interesting post @ XS from thread linked above Quote:
|
THG already posted an explanation for their strange results, they simply messed it all up. I wonder how they actually dared publishing all that BS without even making sure they switched the mentioned limit off in the BIOS... Pretty embarrassing, one more reason not to bother with their amateurish reviews. |
they do bring forward a good tweak for us to check in the BIOS as apparently not all boards will allow to disable the check |
Good to know about those settings. TR didn't mention them, but didn't seem to have any trouble or any need to modify voltages to get a 200MHz QPI bus http://techreport.com/articles.x/15816/9 |
All times are GMT +1. The time now is 12:27. |
Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO