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CPU-z vs Bios

Last response: in Overclocking
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January 28, 2011 3:15:19 PM

Hello,
I started to use CPU-Z to overclock and it shows clockspeed to be different then what the bios is showing is that common?

Update:
After some testing it seems the bios thinks the multiplier is set higher then what cpu-z is showing ie CPU-Z says the multiplier is 6 but the bios is showing 9 (the setting I am trying to use) If i restart the multiplier is reset to 6 any suggestions?


This is the info from CPU-Z everything is the same as the bios expect the multiplier and core speed on boot up the bios shows the core speed as 3600 or 3.60 and the multiplier as 9

Processor 1 ID = 0
Number of cores 4 (max 4)
Number of threads 4 (max 4)
Name Intel Core 2 Quad Q9650
Codename Yorkfield
Specification Intel(R) Core(TM)2 Quad CPU Q9650 @ 3.00GHz
Core Speed 2400.1 MHz
Multiplier x FSB 6.0 x 400.0 MHz
Rated Bus speed 1600.1 MHz
Stock frequency 3000 MHz
Max VID 1.225 V
Chipset
-------------------------------------------------------------------------

Northbridge NVIDIA nForce 790i Ultra SLI SPP rev. B1
Southbridge NVIDIA nForce 790i Ultra SLI MCP rev. A3
Memory Type DDR3
Memory Size 4096 MBytes
Channels Single
Memory Frequency 800.0 MHz (1:2)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 25
Bank Cycle Time (tRC) 41
Command Rate (CR) 2T


Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Corsair (7F7F9E0000000000)
Size 4096 MBytes
Max bandwidth PC3-8500F (533 MHz)
Part number CMX4GX3M1A1600C9
Manufacturing date Week 23/Year 10
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-18-24 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-23-31 @ 609 MHz
JEDEC #4 9.0-9-9-26-35 @ 685 MHz
XMP profile XMP-1600
Specification PC3-12800E
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)


Mainboard Model STRIKER II EXTREME (0x00000510 - 0x0CBF72A0)

Hardware Monitors
-------------------------------------------------------------------------

Hardware monitor ITE IT87
Voltage 0 1.20 Volts [0x46] (CPU VCORE)
Voltage 1 3.34 Volts [0xD1] (+3.3V)
Voltage 3 5.05 Volts [0xBC] (+5V)
Voltage 4 12.10 Volts [0xBD] (+12V)
Voltage 7 4.95 Volts [0xB8] (+5V VCCH)
Voltage 8 3.12 Volts [0xC3] (VBAT)
Temperature 0 64°C (147°F) [0x40] (TMPIN0)
Temperature 1 51°C (123°F) [0x33] (TMPIN1)
Temperature 2 23°C (73°F) [0x17] (TMPIN2)
Fan 0 2596 RPM [0x104] (FANIN0)
Fan 1 2150 RPM [0x13A] (FANIN1)
Fan PWM 0 99 pc [0x7F] (FANPWM0)
Fan PWM 1 99 pc [0x7F] (FANPWM1)
Fan PWM 2 0 pc [0x0] (FANPWM2)

Min tRP 11.25 ns
Min tRCD 11.25 ns
Min tWR 15.00 ns
Min tRAS 30.00 ns
Min tRC 50.63 ns
Min tRFC 160.00 ns
Min tRTP 7.50 ns
Min tRRD 7.50 ns
Command Rate 2T
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-6-6-16-27-2T @ 533 MHz (1.650 Volts)
XMP #2 9.0-9-9-24-41-2T @ 800 MHz (1.650 Volts)

Hope this helps

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a c 297 V Motherboard
a c 159 à CPUs
a c 293 K Overclocking
January 28, 2011 4:06:08 PM

Hi and welcome to Tom's forum.

What are your rig specs? What speed show BIOS and CPU-Z?
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a b à CPUs
a b K Overclocking
January 28, 2011 4:06:12 PM

Check with everest..
The difference might be EIST [cool n quiet] voltage and multiplier lowered thus decrease in clock/
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January 28, 2011 4:14:31 PM

EIST is enabled along with VMM and Xbit only becuase when ever I try to disable VMM and Xbit the system doesn't boot.

Update: I was able to disable the EIST.
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Best solution

a b V Motherboard
a b à CPUs
a b K Overclocking
January 28, 2011 4:21:03 PM

The cpu clocks itself down when not being used by decreasing multiplier. This is a energy saving feature.

Do something intensive like play a game or something and you'll see it go back up to it's full speed. You could even click your browser like 10 times and open 10 pages quickly, then you'll see it go up to full speed.

This feature has been on Intel processors for YEARS.

If you read your cpu or motherboard manual you would know this and you wouldn't look dumb.
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January 28, 2011 4:44:31 PM

I don't feel dumb I learned something and ill keep asking questions to learn more thanks for the info. Ill play with the multiplier and test under a load see what happens.
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a b à CPUs
a b K Overclocking
January 28, 2011 4:48:57 PM

Np. Feel free to ask anything :) 
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January 28, 2011 5:03:48 PM

Seems Geek was right I am a nub at OC ing thanks all for your info and help now maybe I can really start OC ing this rig so you will probably see a question from me again soon.
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January 28, 2011 5:04:18 PM

Best answer selected by jasskin.
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a b V Motherboard
a b à CPUs
a b K Overclocking
January 28, 2011 6:07:53 PM

Ok well since your a nub at overclocking, make sure when you do that you change the dram ratio so that your ram doesn't run over it's rated speed.

For instance, I see now that your running your DDR3 at 1600mhz. I sure hope it's 1600mhz ram and not 1333 or 1066. It'll burn up quick.
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a c 297 V Motherboard
a c 159 à CPUs
a c 293 K Overclocking
January 28, 2011 6:15:33 PM

This topic has been closed by Saint19
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