Go Back   AnandTech Forums > Hardware and Technology > CPUs and Overclocking

· Hardware and Technology
· CPUs and Overclocking
· Motherboards
· Video Cards and Graphics
· AMD Video Cards
· Nvidia
· Displays
· Memory and Storage
· Power Supplies
· Cases & Cooling
· SFF, Notebooks, Pre-Built/Barebones PCs
· Networking
· Peripherals
· General Hardware
· Highly Technical
· Computer Help
· Home Theater PCs
· Consumer Electronics
· Digital and Video Cameras
· Mobile Devices & Gadgets
· Audio/Video & Home Theater
· Software
· Software for Windows
· All Things Apple
· *nix Software
· Operating Systems
· Programming
· PC Gaming
· Console Gaming
· Distributed Computing
· Security
· Social
· Off Topic
· Politics and News
· Discussion Club
· Love and Relationships
· The Garage
· Health and Fitness
· Home and Garden
· Merchandise and Shopping
· For Sale/Trade
· Hot Deals with Free Stuff/Contests
· Black Friday 2015
· Forum Issues
· Technical Forum Issues
· Personal Forum Issues
· Suggestion Box
· Moderator Resources
· Moderator Discussions

Thread Tools
Old 11-05-2009, 09:14 PM   #1
Senior Member
Join Date: Dec 2007
Posts: 980
Default Is it normal to raise the multiplier on the i7 860?

Hey, I just noticed that I can raise my multiplier on my i7 860 in my bios from the default 21 to 22. Is this normal? The max CPU speed is listed as 2.8GHz, and this puts it at 2.94. . . .

I thought all processors's multipliers were upwards locked.
Intel Core i7 860 (Thermalright 120 Ultra) | MSI P55-GD65 | 4x4GB DDR3-1600 | XFX Radeon 7950 | WD 640GB Black & 4x Samsung EcoGreen F2 1.5TB (RAID-5) & Samsung F4 1TB | Antec Neo Eco 620c | Logitech Z-5500 | Antec 300 | Dell Ultrasharp 2312HM & Dell Ultrasharp 2007WFP | Logitech MX518 | Windows 7 Professional x64

Absolution75 is offline   Reply With Quote
Old 11-07-2009, 04:25 PM   #2
Elite Member
RussianSensation's Avatar
Join Date: Sep 2003
Location: Toronto, Canada
Posts: 18,766

Core i5 and i7 processors have a Turbo Mode feature which allows the processor to dynamically access higher multipliers in the Dynamic operating mode (i.e., when Turbo Mode is Enabled). Maximum Intel® Turbo Boost Technology frequency per core - 4 core: 2.93 GHz (22x multiplier), 3 core: 2.93 GHz (22x multiplier), 2 core: 3.33 GHz (25x multiplier); 1 core: 3.46 GHz (26x multiplier). The higher multipliers are activated automatically depending on the processor workload when Turbo Mode is enabled in the BIOS.

Certain manufacturers such as Asus, MSI, EVGA also allow you to access 1 or 2 upper multipliers from your maximum stock multiplier of 21x in the Static operating mode (i.e., when Turbo Mode is Disabled). You are free to utilize this BIOS feature to manually select the 22x multiplier at nominal 133 Base Clock for the Core i7 860 processor on your motherboard. Similarly, 21x and 23x multipliers are available on Core i5 750 and Core i7 870, respectively.

Since with Turbo Mode enabled you already gain access to 22x multiplier when 3 or 4 cores are fully utilized, along with the higher multipliers when you are only using 2 or 1 cores, there is no benefit in running your system with 22x multiplier without Turbo Mode, unless you overclock your base clock frequency beyond 133. However, since Core i7 processors tend to overclock better with odd multipliers, if you intend to overclock to 200 Base Clock, maintaining a 21x multiplier is probably better (your mileage may vary).

Last edited by RussianSensation; 11-07-2009 at 04:36 PM.
RussianSensation is offline   Reply With Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 05:20 AM.

Powered by vBulletin® Version 3.8.8 Alpha 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.