Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Windows › Is the CPU idle in BIOS?
New Posts  All Forums:Forum Nav:

Is the CPU idle in BIOS?

post #1 of 13
Thread Starter 
Hi all,

Ok, this may be a stuuupid Q but I read somewhere (I think on the eVGA forums) that the CPU is not totally idle when you are in BIOS. Is this true? Doesn’t make sense to me but I am still learning.

Then again, when I check my CPU temp in BIOS, it reads around 34C then gets upto about 37C and stays there but in Speedfan, HWmonitor and Everest I get a 31C in Windows once my system is idle after startup tasks. What gives?

Please let me know, I am mucho curiouso!
PacMan4
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6420 @ 3.0Ghz eVGA 680i LT eVGA 8800 GTS 640mb @648/1015 4GB OCZ Platinum 800MHz 
Hard DriveOptical DriveOSPower
320 Western Digital DVD±R/RW/CD-R/RW Windows Vista Home Premium 620W Corsair HX 
Case
CoolerMaster 730 
  hide details  
Reply
PacMan4
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6420 @ 3.0Ghz eVGA 680i LT eVGA 8800 GTS 640mb @648/1015 4GB OCZ Platinum 800MHz 
Hard DriveOptical DriveOSPower
320 Western Digital DVD±R/RW/CD-R/RW Windows Vista Home Premium 620W Corsair HX 
Case
CoolerMaster 730 
  hide details  
Reply
post #2 of 13
Yup. FYI, you can go into bios without a cpu, which proves that its unused
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
post #3 of 13
Thread Starter 
Quote:
Originally Posted by jaclipse View Post
Yup. FYI, you can go into bios without a cpu, which proves that its unused
Thanks!

Then why the temp discrepancy?
PacMan4
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6420 @ 3.0Ghz eVGA 680i LT eVGA 8800 GTS 640mb @648/1015 4GB OCZ Platinum 800MHz 
Hard DriveOptical DriveOSPower
320 Western Digital DVD±R/RW/CD-R/RW Windows Vista Home Premium 620W Corsair HX 
Case
CoolerMaster 730 
  hide details  
Reply
PacMan4
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6420 @ 3.0Ghz eVGA 680i LT eVGA 8800 GTS 640mb @648/1015 4GB OCZ Platinum 800MHz 
Hard DriveOptical DriveOSPower
320 Western Digital DVD±R/RW/CD-R/RW Windows Vista Home Premium 620W Corsair HX 
Case
CoolerMaster 730 
  hide details  
Reply
post #4 of 13
Quote:
Originally Posted by Qbert View Post
Thanks!

Then why the temp discrepancy?
Well, from what I understand, the BIOS CPU temp reflects a temp when the CPU is at 80% load. Whether the CPU is actually running at 80% or if this is just a method they use when reflecting the temp, I don't know.


Also, I didn't know you could access BIOS with no CPU. I am assuming that you would need something besides a standard desktop mobo to do this as it won't POST without a CPU. AFAIK
Current
(3 items)
 
  
CPUMotherboardGraphics
i5 6600k MSI Z170-A Pro RX-480 
  hide details  
Reply
Current
(3 items)
 
  
CPUMotherboardGraphics
i5 6600k MSI Z170-A Pro RX-480 
  hide details  
Reply
post #5 of 13
Maybe the motherboard heats up a bit while in the bios and raises the cpu temp slightly
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
post #6 of 13
Quote:
Originally Posted by jaclipse View Post
Yup. FYI, you can go into bios without a cpu, which proves that its unused
Are you sure?

There are a few POST checks for CPU and you can't get into the BIOS until POST completes. i.e. POST info screen reports your CPU before you have the option to enter BIOS.
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
Once again...
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 [4.28GHz, HT] Asus P6T + Broadcom NetXtreme II VisionTek HD5850 [900/1200] + Galaxy GT240 2x4GB G.Skill Ripjaw X [1632 MHz] 
Hard DriveOSMonitorKeyboard
Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
PowerCaseMouseMouse Pad
Antec Truepower New 750W Li Lian PC-V2100 [10x120mm fans] Logitech G9 X-Trac Pro 
  hide details  
Reply
post #7 of 13
You CANT go into BIOS without a cpu.

Those who had to update their boards to accept their new 45mm cpus will vouch for that
Baby Gamer
(13 items)
 
  
CPUMotherboardGraphicsRAM
E6850 GA-P35-DS3L EVGA 8800GS 384MB G.SKILL 4GB DDR2 1000 
Hard DriveOptical DriveOSMonitor
Seagate 250gb SATA Samsung 20x Burner Vista x86/ Ubuntu 8.04 x64 Dell 23" 1080p 
PowerCase
CM ProPower 550w CM690 
  hide details  
Reply
Baby Gamer
(13 items)
 
  
CPUMotherboardGraphicsRAM
E6850 GA-P35-DS3L EVGA 8800GS 384MB G.SKILL 4GB DDR2 1000 
Hard DriveOptical DriveOSMonitor
Seagate 250gb SATA Samsung 20x Burner Vista x86/ Ubuntu 8.04 x64 Dell 23" 1080p 
PowerCase
CM ProPower 550w CM690 
  hide details  
Reply
post #8 of 13
Yea, scratch that. Google search failed me
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
And then
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom 9750 @ 3.0 Foxconn A7DA-S XFX HD4770 G.Skill Pi Black 2x2GB 
Hard DriveOptical DriveOSMonitor
40GB Intel X25-V & 2.5TB Storage Samsung DVD/RW SATA Vista x64 Envision 22" 
PowerCase
Antec Basiq Plus 550w Rocketfish Lian Li 
  hide details  
Reply
post #9 of 13
BIOS idle is not the same as windows idle. The former is generally a larger load as it's rendering the BIOS as fast as possible, while the windows System Idle Process is specifically grabing all spare cycles and intentionally doing nothing with them.

Also, you cannot enter the BIOS setup without a CPU.
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.2/3.5GHz core/uncore, 1.175/1.15v Gigabyte X99 SOC Champion (F22n) Gigabyte AORUS GTX 1080 Ti (F3P) @ 2025/1485, 1... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.34v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.06) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Sapphire Fury Nitro OC+ @ 1053/500, 1.225vGPU/1... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
Primary
(15 items)
 
Secondary
(13 items)
 
In progress
(10 items)
 
CPUMotherboardGraphicsRAM
5820K @ 4.2/3.5GHz core/uncore, 1.175/1.15v Gigabyte X99 SOC Champion (F22n) Gigabyte AORUS GTX 1080 Ti (F3P) @ 2025/1485, 1... 4x4GiB Crucial @ 2667, 12-12-12-28-T1, 1.34v 
Hard DriveHard DriveHard DriveCooling
Plextor M6e 128GB (fw 1.06) M.2 (PCI-E 2.0 2x) 2x Crucial M4 256GB 4x WD Scorpio Black 500GB Noctua NH-D15 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 BenQ BL3200PT Filco Majestouch Tenkeyless (MX Brown) Corsair RM1000x 
CaseMouseAudio
Fractal Design Define R4 Logitech G402 Realtek ALC1150 + M-Audio AV40 
CPUMotherboardGraphicsRAM
X5670 @ 4.4/3.2GHz core/uncore, 1.36 vcore, 1.2... Gigabyte X58A-UD5 r2.0 w/FF3mod10 BIOS Sapphire Fury Nitro OC+ @ 1053/500, 1.225vGPU/1... 2x Samsung MV-3V4G3D/US @ 2000, 10-11-11-30-T1,... 
RAMHard DriveHard DriveHard Drive
1x Crucial BLT4G3D1608ET3LX0 @ 2000, 10-11-11-3... OCZ (Toshiba) Trion 150 120GB Hyundai Sapphire 120GB 3x Hitachi Deskstar 7k1000.C 1TB 
CoolingOSPowerCase
Noctua NH-D14 Windows 7 Pro x64 SP1 Antec TP-750 Fractal Design R5 
Audio
ASUS Xonar DS 
CPUMotherboardGraphicsRAM
i7-6800K @ 4.3/3.5GHz core/uncore, 1.36/1.2v ASRock X99 OC Formula (P3.10) GTX 780 (temporary) 4x4GiB Crucial DDR4-2400 @ 11-13-12-28-T2, 1.33v 
Hard DriveHard DriveCoolingOS
Intel 600p 256GB NVMe 2x HGST Travelstar 7k1000 1TB Corsair H55 (temporary) Windows Server 2016 Datacenter 
PowerCase
Seasonic SS-860XP2 Corsair Carbide Air 540 
  hide details  
Reply
post #10 of 13
Quote:
Originally Posted by dralb View Post
Well, from what I understand, the BIOS CPU temp reflects a temp when the CPU is at 80% load. Whether the CPU is actually running at 80% or if this is just a method they use when reflecting the temp, I don't know.


Also, I didn't know you could access BIOS with no CPU. I am assuming that you would need something besides a standard desktop mobo to do this as it won't POST without a CPU. AFAIK
I thought this too...
Black
(13 items)
 
  
CPUMotherboardGraphicsRAM
C2D E2140 / 2.8Ghz / 350x8 / 1.275Vcore Gigabyte P35C DS3R Sapphire X1950Pro 256MB 4GB OCZ DDR2 1000 Reapers? Or something. 
Hard DriveOptical DriveOSKeyboard
WD5000AAKS LG DVD-RW Windows XP Pro Logitech Media Keyboard 
PowerCaseMouseMouse Pad
Corsair VX 550W Antec P182 Logitech MX518 None 
  hide details  
Reply
Black
(13 items)
 
  
CPUMotherboardGraphicsRAM
C2D E2140 / 2.8Ghz / 350x8 / 1.275Vcore Gigabyte P35C DS3R Sapphire X1950Pro 256MB 4GB OCZ DDR2 1000 Reapers? Or something. 
Hard DriveOptical DriveOSKeyboard
WD5000AAKS LG DVD-RW Windows XP Pro Logitech Media Keyboard 
PowerCaseMouseMouse Pad
Corsair VX 550W Antec P182 Logitech MX518 None 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Windows
Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Windows › Is the CPU idle in BIOS?