CPU-Z

System information software

CPU-Z
CPU-Z is a freeware that gathers information on some of the main devices of your system :
  • Processor name and number, codename, process, package, cache levels.
  • Mainboard and chipset.
  • Memory type, size, timings, and module specifications (SPD).
  • Real time measurement of each core's internal frequency, memory frequency.
The CPU-Z‘s detection engine is now available for customized use through the CPUID System Information Development Kit, a professional SDK built for the Microsoft Windows & Android.

DOWNLOAD

Version 1.72 for windows®
OLD VERSIONS

DOWNLOAD CUSTOM

Customized version 1.72 for windows®
  • Preliminary support for Intel Skylake.
  • Fixed support for Windows 10 build 9926.

SYSTEM OF THE WEEK

Intel Core i7-4790K CPU @ 4.00GHz
16GB DDR3
NVIDIA GeForce GTX 770
Windows 7 Ultimate Edition 64-bit

Install and Remove
Since version 1.51, CPU-Z includes an installer. The installation offers several advantages in comparison to the stand-alone version :
  • The installation creates program entries in the start menu and on the desktop.
  • It installs the right binary (x32 or x64) depending on your system.
Installation
Run the setup executable file, and let it guide you for the installation process.
Removal
You can remove the program either from the Add or Remove Programs window (from Settings, Control Panel), or choose Uninstall CPU-Z from Start menu, Programs, CPUID, CPU-Z.
Configuration file
CPU-Z uses a configuration file, cpuz.ini, that allows to set several parameters for the program. The cpuz.ini file must be in the same directory as cpuz.exe. Note that the use of this file is optional. If no .ini file is found, default values will be used. It looks like this : [CPU-Z]
TextFontName=Verdana
TextFontSize=13
TextFontColor=000060
LabelFontName=Verdana
LabelFontSize=13
PCI=1
MaxPCIBus=256
DMI=1
Sensor=1
SMBus=1
Display=1
UseDisplayAPI=1
BusClock=1
Chipset=1
SPD=1
CheckUpdates=1
TextFontName Font used for the information boxes.
TextFontSize Size of the font used for the information boxes.
TextFontColor Color of the font used for the information boxes. Value is expressed in hexadecimal, and consists in a classic Red/Green/Blue color code : RRGGBB
LabelFontName Font used for the label boxes.
LabelFontSize Size of the font used for the label boxes.
Sensor Set to OFF (or 0) disables sensor chip detection and voltages measurement.
DMI Set to OFF disables the DMI (Desktop Management Interface) information. This concerns BIOS vendor and version, motherboard vendor and revision.
PCI Set to OFF disables the PCI information. This disables chipset, SPD and, depending on the hardware, sensoring information.
MaxPCIBus Sets the maximum PCI bus to scan. Default value is 256.
SMBus Set to OFF (or 0) disables SMBus information : SPD, and, depending on the hardware, sensoring information.
Display Set to OFF (or 0) disables the video card information reported in the validator.
ShowDutyCycles Set to 1, switches the alternate clock computation method based on duty cycles. 0 to disable.
UseDisplayAPI Set to 1, uses the display driver to read the display adapters information. 0 to disable.
Application parameters
-txt=report Launch CPU-Z in ghost mode : no interface appears, the register dump (report.txt) is automatically created.Example:cpuz.exe -txt=c:\mydirectory\mysystem: runs CPU-Z in ghost mode. Report file mysystem.txt is automatically generated in directory c:\mydirectory.
-html=report Same as "-txt" but generates the html report file.
-core=id Displays clock speed of core #id (id can be set from 0 to "Number of cores minus one"). It is then possible to check the speed of each core by running as many instances of CPU-Z as necessary, using batch files for example: cpuz0.bat: cpuz.exe -core=0 cpuz1.bat: cpuz.exe -core=1 Note that the current core can be dynamically selected by right-clicking in the CPU page, and select the target core. This feature is available from version 1.42.
-console Generates output in a command prompt (Windows XP only).
Special Keys
The F5 key allows to save a screenshot as a bmp file in the application directory. These are named cpu.bmp, cache.bmp, mainboard.bmp and memory.bmp.
The F6 key copies the current page in the clipboard.
The F7 key saves the validation cvf file in the current directory.
The F9 key switches between CPU clock computation methods.
Cache Latency Computation
The cache latency computation tool allows to gather information about the cache hierarchy of the system. For each cache level, it provides its size and its latency. Please note that code caches are not reported.The latency tool can be downloaded here.
1.
CPU-Z reports my CPU running below its clock specification or the clock speed is varying.
This is the effect of the CPU power reduction mechanism : C1E (Enhanced Halt State) and/or EIST (Enhanced Intel SpeedStep Technology) for Intel CPUs, Cool'n'Quiet and or PowerNow! for AMD CPUs. Load your system and you will see the frequency increase to its nominal value.
2.
CPU-Z reports a wrong CPU vcore.
Please download then save monitoring data (menu file -> save monitoring data) and send back the file to us via the bug report form.
3.
CPU-Z causes a general protection fault, or freezes my system, or causes a blue screen.
edit cpuz.ini, and replace: DMI=1
Sensor=1
SMBus=1
Display=1
UseDisplayAPI=1
with:
DMI=0
Sensor=0
SMBus=0
Display=0
UseDisplayAPI=0
Then run cpu-z again. If it works, restore the "1" one by one, until the problem occurs again. Then send an email and mentioning which "1" is responsible.
4.
Why does CPU-Z misreport my memory module specification ? For example, my DDR2-800 is reported as DDR2-667.
The memory theorical bandwidth is computed using the module access time information for the maximal CAS# latency value, included in the SPD area. If the computed bandwidth is lower than the one specified on the memory module, that means that the SPD information on the module is not correctly programmed, or most likely that the bandwidth is not given at the default memory voltage, but at a voltage defined in an extended profile (EPP or XMP).

VERSIONS HISTORY

CPU-Z 1.72
February 27th, 2015
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CPU-Z 1.72
February 27th, 2015
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  • Preliminary support for Intel Skylake.
  • Fixed support for Windows 10 build 9926.
  • Preliminary support for Intel Skylake.
  • Fixed support for Windows 10 build 9926.
CPU-Z 1.71.1
October 09th, 2014
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CPU-Z 1.71.1
October 09th, 2014
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  • Intel Core M processors (1.71.1)
  • New CPU-Z logo (1.71.1)
  • AMD Athlon X2 450, Athlon X4 840 and Athlon X4 860K (Kaveri).
  • AMD FX-8370, FX-8370E, FX-8320E (Vishera).
  • Improved support for Intel X99 chipset.
  • Support for Microsoft Windows 10.
CPU-Z 1.70
July 18th, 2014
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CPU-Z 1.70
July 18th, 2014
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  • Intel i7-5960X, i7-5930K, i7-5820K, i7-4790K, i5-4690K, Pentium G3258
  • TSX instructions set support (including RTM and HLE subparts)
CPU-Z 1.69
March 19th, 2014
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CPU-Z 1.69
March 19th, 2014
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  • Intel Haswell-E processors (1.69.2)
  • Preliminary support for DDR4 memory (1.69.2)
  • AMD FCH detection improved (1.69.2)
  • AMD A6-6420K, A4-6320, A4-4020.
  • AMD Athlon 5350 & 5150, Sempron 3850 & 2650 Kabini.
  • Intel Core i7-4770R and Core i5-4570R Crystal Well.
  • Added graphic card vendor.
CPU-Z 1.68
January 09th, 2014
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CPU-Z 1.68
January 09th, 2014
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  • AMD Kaveri APUs (A10-7850K, A10-7800, A10-7700K, A8-7600, A6-7400K, A4-7300).
  • Intel i7-4790, i5-4690, i5-4590, i5-4460 (Haswell refresh).
  • Intel Celeron Haswell (G1830, G1820).
  • Intel serie 9 chipset (Z97).
  • Nuvoton NCT6106 and SMSC SCH5636 SIOs (Fujitsu mainboards).
CPU-Z 1.67
November 13th, 2013
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CPU-Z 1.67
November 13th, 2013
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  • Improved support of Intel Silvermont (Bay Trail)
  • New validation
CPU-Z 1.66
August 18th, 2013
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CPU-Z 1.66
August 18th, 2013
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  • Intel Xeon E5-2600 V2, Core i3-4xxx, Core i7-3910K processors.
  • Intel Ivy Bridge-E/EP/EX support improved.
  • Intel Atom Bay Trail-T preliminary support.
  • AMD Opteron 3200 and 3300 series
  • ITE IT8603 and IT8623 SIOs (Asus FM2+ mainboards).
  • Microsoft Windows 8.1 (Windows Blue).
  • New version checker.
CPU-Z 1.65
June 28th, 2013
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CPU-Z 1.65
June 28th, 2013
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  • AMD Opteron X1150 and X2150
  • AMD FX-9590 and FX-9370
  • Intel 4xxxHQ "Crystalwell" CPUs
  • Intel Pentium "Haswell" G3430, G3420, G3220
CPU-Z 1.64
April 23th, 2013
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CPU-Z 1.64
April 23th, 2013
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  • Intel Atom "Cloverview" CPUs
  • Intel Ivy Bridge-E/EP/EX CPUs
  • AMD Richland APUs
CPU-Z 1.63
February 08th, 2013
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CPU-Z 1.63
February 08th, 2013
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  • Intel Pentium & Celeron "Ivy Bridge" CPUs
  • AMD Athlon X4 750K
  • FMA3 & 4 instructions sets
  • Support for systems with more than 64 CPUs
  • Report TDP in validation pages