Overclock.net › Forums › AMD › AMD CPUs › Anyone ever intentionally disable Thuban cores?
New Posts  All Forums:Forum Nav:

Anyone ever intentionally disable Thuban cores?

post #1 of 47
Thread Starter 
I was playing around in BIOS and AMD Overdrive trying to see which cores had the most headroom. I discovered my CPU temps drop 20C if I disable two of the six cores...perhaps a viable solution for summertime overclocking
Light Gamer #1
(12 items)
 
Light Gamer #2
(10 items)
 
 
CPUMotherboardGraphicsGraphics
i3-6100 ASRock Fatal1ty Z170 Gaming K4/D3 MSI r7850 TFIII OC MSI r7850 TFIII OC 
RAMHard DriveCoolingOS
G,Skill TridentX OCZ Vector 150 TPC-612 Windows 10 
KeyboardPowerCaseMouse
G105 Rosewill Capstone 550M HAF XB M570 
CPUMotherboardGraphicsRAM
Athlon 860K MSI A88X-G45 MSI GTX 460 G.Skill RipjawsZ 
Hard DriveCoolingOSKeyboard
PNY Optima Hyper T4 Windows 10 Devastator 2 
PowerCase
Rosewill Valens DIYPC Ranger-R4-R 
  hide details  
Reply
Light Gamer #1
(12 items)
 
Light Gamer #2
(10 items)
 
 
CPUMotherboardGraphicsGraphics
i3-6100 ASRock Fatal1ty Z170 Gaming K4/D3 MSI r7850 TFIII OC MSI r7850 TFIII OC 
RAMHard DriveCoolingOS
G,Skill TridentX OCZ Vector 150 TPC-612 Windows 10 
KeyboardPowerCaseMouse
G105 Rosewill Capstone 550M HAF XB M570 
CPUMotherboardGraphicsRAM
Athlon 860K MSI A88X-G45 MSI GTX 460 G.Skill RipjawsZ 
Hard DriveCoolingOSKeyboard
PNY Optima Hyper T4 Windows 10 Devastator 2 
PowerCase
Rosewill Valens DIYPC Ranger-R4-R 
  hide details  
Reply
post #2 of 47
Why would you buy a hexa-core processor just to disable 33% of them?
Poison Ivy
(31 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770K (4.4GHz @ 1.26V) ASRock Z77 Extreme6 EVGA GTX 980Ti ACX 2.0+ 8GB G.SKILL Trident X 2400MHz 
Hard DriveHard DriveCoolingCooling
256GB Samsung 850 Pro 256GB Samsung 840 Pro Rasa RS240 Phobya Xtreme 200mm Radiator 
OSMonitorMonitorKeyboard
Windows 8.1 Pro 64-bit Dell U2412M QNIX QX2710LED Leopold FC660M (MX Clears) 
PowerCaseMouseMouse Pad
Corsair AX850 Corsair 600T White Edition SteelSeries Rival Glorious PC Gaming Race Desk Pad 
AudioAudioAudioAudio
Sony STR-K900 Receiver Bic America F12 Sub Sennheiser HD600 Beyerdynamic DT 770 Pro 80 
AudioAudioAudioAudio
FiiO E7 Little Dot MKIII AntLion ModMic 4.0 ART DJPre2 Phono Preamp 
AudioAudioAudioOther
Technics SL-DL1 Turntable TEAC EQA-22 Equalizer Pioneer SP-BS22-LR Bookshelf Speakers Logitech G27 Racing Wheel 
OtherOtherOther
Planck Keyboard Carbon Keycap Set Mount-It! Dual Monitor Desk Mount 
  hide details  
Reply
Poison Ivy
(31 items)
 
  
CPUMotherboardGraphicsRAM
i7 3770K (4.4GHz @ 1.26V) ASRock Z77 Extreme6 EVGA GTX 980Ti ACX 2.0+ 8GB G.SKILL Trident X 2400MHz 
Hard DriveHard DriveCoolingCooling
256GB Samsung 850 Pro 256GB Samsung 840 Pro Rasa RS240 Phobya Xtreme 200mm Radiator 
OSMonitorMonitorKeyboard
Windows 8.1 Pro 64-bit Dell U2412M QNIX QX2710LED Leopold FC660M (MX Clears) 
PowerCaseMouseMouse Pad
Corsair AX850 Corsair 600T White Edition SteelSeries Rival Glorious PC Gaming Race Desk Pad 
AudioAudioAudioAudio
Sony STR-K900 Receiver Bic America F12 Sub Sennheiser HD600 Beyerdynamic DT 770 Pro 80 
AudioAudioAudioAudio
FiiO E7 Little Dot MKIII AntLion ModMic 4.0 ART DJPre2 Phono Preamp 
AudioAudioAudioOther
Technics SL-DL1 Turntable TEAC EQA-22 Equalizer Pioneer SP-BS22-LR Bookshelf Speakers Logitech G27 Racing Wheel 
OtherOtherOther
Planck Keyboard Carbon Keycap Set Mount-It! Dual Monitor Desk Mount 
  hide details  
Reply
post #3 of 47
Quote:
Originally Posted by razr m3 View Post
Why would you buy a hexa-core processor just to disable 33% of them?
This
I'd sacrifice a bit of quietness in order to maintain performance, underclock stuff, or just buy slower components to be silent. This coming from someone who always has a 30c+ ambient temp
X79 The Hydra
(22 items)
 
 
i865G Chronos
(15 items)
 
CPUMotherboardGraphicsRAM
Core 2 Extreme X6800 AsRock 775i65G R2.0 ATI Radeon X1950 XT OCZ EL DDR Gold Edition GX 
Hard DriveOptical DriveCoolingOS
Samsung MMBRE64GHDXP-MVBD1 Samsung SH-222 Thermalright Ultima-90 Windows 98 SE 
OSMonitorKeyboardPower
Windows XP Professional 32 bit Dell SP2309W Genius SlimStar 8000 Generic 500w PSU 
CaseMouseAudio
Generic Case Genius SlimStar 8000 Creative Sound Blaster Audigy 2 ZS 
  hide details  
Reply
X79 The Hydra
(22 items)
 
 
i865G Chronos
(15 items)
 
CPUMotherboardGraphicsRAM
Core 2 Extreme X6800 AsRock 775i65G R2.0 ATI Radeon X1950 XT OCZ EL DDR Gold Edition GX 
Hard DriveOptical DriveCoolingOS
Samsung MMBRE64GHDXP-MVBD1 Samsung SH-222 Thermalright Ultima-90 Windows 98 SE 
OSMonitorKeyboardPower
Windows XP Professional 32 bit Dell SP2309W Genius SlimStar 8000 Generic 500w PSU 
CaseMouseAudio
Generic Case Genius SlimStar 8000 Creative Sound Blaster Audigy 2 ZS 
  hide details  
Reply
post #4 of 47
Thread Starter 
Quote:
Originally Posted by razr m3 View Post
Why would you buy a hexa-core processor just to disable 33% of them?
Quote:
Originally Posted by Starbomba View Post
This
I'd sacrifice a bit of quietness in order to maintain performance, underclock stuff, or just buy slower components to be silent. This coming from someone who always has a 30c+ ambient temp
Because I can?

Funny thing is I actually paid about the same for this Ph2 1090T ($185) than I did for my Ph2 955 ($180), both new off the egg. I sold that Ph2 955 rig to a co-worker and turned right around and bought the 1090T a few months ago.

Anyways back on topic, I don't have any games that actually utilize all 6 cores, but could utilize higher clock speed.

As Gulf Coast weather has started to heat up, I approached my thermal limits, and have had to throttle clocks back. It's been a fight for clocks versus temperatures, and I've done everything from change fan configurations, heatsink orientations, and thermal paste arts and crafts

Now after seeing how much my TDP was reduced by disabling some cores, I can see why they have this Turbo Boost feature on the Thubans. Turbo Boost in itself is kind of worthless IMO, but making a profile in the BIOS for running as a quad-core seems to have netted me about 500 MHZ and the difference between Prime 95 at 65C and 45C

Light Gamer #1
(12 items)
 
Light Gamer #2
(10 items)
 
 
CPUMotherboardGraphicsGraphics
i3-6100 ASRock Fatal1ty Z170 Gaming K4/D3 MSI r7850 TFIII OC MSI r7850 TFIII OC 
RAMHard DriveCoolingOS
G,Skill TridentX OCZ Vector 150 TPC-612 Windows 10 
KeyboardPowerCaseMouse
G105 Rosewill Capstone 550M HAF XB M570 
CPUMotherboardGraphicsRAM
Athlon 860K MSI A88X-G45 MSI GTX 460 G.Skill RipjawsZ 
Hard DriveCoolingOSKeyboard
PNY Optima Hyper T4 Windows 10 Devastator 2 
PowerCase
Rosewill Valens DIYPC Ranger-R4-R 
  hide details  
Reply
Light Gamer #1
(12 items)
 
Light Gamer #2
(10 items)
 
 
CPUMotherboardGraphicsGraphics
i3-6100 ASRock Fatal1ty Z170 Gaming K4/D3 MSI r7850 TFIII OC MSI r7850 TFIII OC 
RAMHard DriveCoolingOS
G,Skill TridentX OCZ Vector 150 TPC-612 Windows 10 
KeyboardPowerCaseMouse
G105 Rosewill Capstone 550M HAF XB M570 
CPUMotherboardGraphicsRAM
Athlon 860K MSI A88X-G45 MSI GTX 460 G.Skill RipjawsZ 
Hard DriveCoolingOSKeyboard
PNY Optima Hyper T4 Windows 10 Devastator 2 
PowerCase
Rosewill Valens DIYPC Ranger-R4-R 
  hide details  
Reply
post #5 of 47
Quote:
Originally Posted by damric View Post
Because I can?

Funny thing is I actually paid about the same for this Ph2 1090T ($185) than I did for my Ph2 955 ($180), both new off the egg. I sold that Ph2 955 rig to a co-worker and turned right around and bought the 1090T a few months ago.

Anyways back on topic, I don't have any games that actually utilize all 6 cores, but could utilize higher clock speed.

As Gulf Coast weather has started to heat up, I approached my thermal limits, and have had to throttle clocks back. It's been a fight for clocks versus temperatures, and I've done everything from change fan configurations, heatsink orientations, and thermal paste arts and crafts

Now after seeing how much my TDP was reduced by disabling some cores, I can see why they have this Turbo Boost feature on the Thubans. Turbo Boost in itself is kind of worthless IMO, but making a profile in the BIOS for running as a quad-core seems to have netted me about 500 MHZ and the difference between Prime 95 at 65C and 45C

I tried the same thing. Heat went way down. My Thuban OC to 4.1 GHz with NB at 2800MHz.

Some may argue that disabling 2 cores is a waste but most of my applications only use 4 cores or less AND Thubans OC much better than regular quad-cores with MUCH less heat. I don't have the best cooler, so this was the way to go!
    
CPUMotherboardGraphicsRAM
Intel 2600k (Stock) Asus Maximus Gene V  Powercolor AX6850 Passive Cooler Gskill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex II 90GB External Noctua NH-D14 Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
Gone Microsoft Ergonomic 4000 Keyboard Corsair AX850 Silverstone FT03B 
MouseMouse Pad
Logitech G500 Black Normal 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel 2600k (Stock) Asus Maximus Gene V  Powercolor AX6850 Passive Cooler Gskill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex II 90GB External Noctua NH-D14 Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
Gone Microsoft Ergonomic 4000 Keyboard Corsair AX850 Silverstone FT03B 
MouseMouse Pad
Logitech G500 Black Normal 
  hide details  
Reply
post #6 of 47
Could be a good idea...right now I would put a 100MHz more clock over have two more cores. That hopefully will change, but so far four cores can do most things just as well as six or eight
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
  hide details  
Reply
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
  hide details  
Reply
post #7 of 47
How does disabling cores give you more OC headroom?
The Douchebag
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8320 SABERTOOTH 990FX AMD Radeon (TM) R9 380 Series Mushkin  
  hide details  
Reply
The Douchebag
(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8320 SABERTOOTH 990FX AMD Radeon (TM) R9 380 Series Mushkin  
  hide details  
Reply
post #8 of 47
Quote:
Originally Posted by doritos93 View Post
How does disabling cores give you more OC headroom?
Lower temps allow you to apply more voltage.
post #9 of 47
Quote:
Originally Posted by doritos93 View Post
How does disabling cores give you more OC headroom?
Quote:
Originally Posted by sub50hz View Post
Lower temps allow you to apply more voltage.

It only gives us more headroom because we do not have a silver arrow or DF14.
    
CPUMotherboardGraphicsRAM
Intel 2600k (Stock) Asus Maximus Gene V  Powercolor AX6850 Passive Cooler Gskill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex II 90GB External Noctua NH-D14 Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
Gone Microsoft Ergonomic 4000 Keyboard Corsair AX850 Silverstone FT03B 
MouseMouse Pad
Logitech G500 Black Normal 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel 2600k (Stock) Asus Maximus Gene V  Powercolor AX6850 Passive Cooler Gskill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
OCZ Vertex II 90GB External Noctua NH-D14 Windows 7 Pro 64bit 
MonitorKeyboardPowerCase
Gone Microsoft Ergonomic 4000 Keyboard Corsair AX850 Silverstone FT03B 
MouseMouse Pad
Logitech G500 Black Normal 
  hide details  
Reply
post #10 of 47
Quote:
Originally Posted by listen to remix View Post
It only gives us more headroom because we do not have a silver arrow or DF14.
Not true. Even with a good cooler, removing a theoretical 33% of the gross heat produced by the CPU makes a huge difference. Cooling 6 cores at 1.5 vCore is a tall order, and very difficult to do unless it's on water.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › Anyone ever intentionally disable Thuban cores?