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Same CPU needing higher voltage on different system with better cooling?

post #1 of 6
Thread Starter 
So i got an i7 6800K that was tested previously to being sold as hitting 4.4ghz at 1.3v and was stable for about a week and passed an hour of Realbench etc.. no problem.

But now that its in my system (rampage v edition 10, 16gb corsair dominator platinum ddr4 2666mhz c15 ram, EVGA Supernova G2 1000w PSU) i need 1.355v to get it stable at 4.4ghz and it can't hit 4.5ghz even at a MASSIVE 1.515v!!!

Something is really strange; so i tried my i7 5960X that i know can hit 4.5ghz at 1.295v, and i can't even get it stable at 1.4v now!

I thought maybe bad RAM, but even using only one stick it still crashes. I thought bad TIM application or bad waterblock pressure, but even after THREE times reseating the block and applying new paste i only get ~4C better temps and ZERO change in the voltage required.,


I'm at the end of my wits here, i've tried every BIOS setting in the book: raising input voltage to 1.98v, raising Load Line Calibration all the way to level 9, raising current capacity to 240%, raising long/short package duration to the max 4095 etc..etc.. nothing works!!! And temps are getting oddly high as well no mater what i do...

The weirdest thing is the guy who got the 6800K to 4.4ghz at 1.3v had just a 240mm AIO cooler, and i have a 1,280mm radiator space custom water cooling loop! (albeit with only 5 fans on it, but still far better than a 240mm aio)
Any ideas?
Edited by DarkIdeals - 7/11/16 at 4:49am
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
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CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
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post #2 of 6
Number one was he using a board with an OC socket, and are you? I had the OC socket on my gigabyte X99 UD3p board, and with it off the CPU would not OC past 4.4 on any voltage. I enabled the OC socket with the switch, and was able to take it to 4.7 no problem. This was a 5820k btw.
post #3 of 6
Thread Starter 
Quote:
Originally Posted by ZXMustang View Post

Number one was he using a board with an OC socket, and are you? I had the OC socket on my gigabyte X99 UD3p board, and with it off the CPU would not OC past 4.4 on any voltage. I enabled the OC socket with the switch, and was able to take it to 4.7 no problem. This was a 5820k btw.

Yes, both systems were usingn OC socket boards. His is an ASUS X99 Deluxe, and mine is the ASUS Rampage V Edition 10. On ASUS boards there is no switch to turn it off or on though so its definitely on.
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
  hide details  
Reply
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
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post #4 of 6
Thread Starter 
Anyone?

I got some new thermal paste today (thermal grizzly kryonaut, real good stuff) and also got some better fans (three Corsair ML120 Pro, the new ones with very nice static pressure) and it really helped my temps. Instead of being in the 80's on all cores on the 6800K, I was in the high 60's to mid 70's; and instead of needing 1.355v to stabilize it at 4.4ghz i only needed 1.325v.!

Then i attempted to get 4.5ghz stable at 1.45v and no luck, so i put it back to normal and went to sleep. Woke up and then did a bit of web browsing and got a clock watchdog error out of NOWHERE! I rebooted and set to 1.33v and for some INSANE reason i'm now BACK to mid to high 80's on core temps and it won't stabilize enough to do even one cinebench run even at 1.33v whereas it was 10-15C lower temps and stable at 1.325v a few hours ago!! WHAT THE HELL?!?!?!?!
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
  hide details  
Reply
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
  hide details  
Reply
post #5 of 6
You should keep it at 4.4 GHz 1.3V as it was tested stable. 100 MHz more might require a significant CPU voltage bump so it's not really surprising to see this happen. Some CPUs don't overclock well and require a lot more CPU voltage at certain higher clock speeds.
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Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
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Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
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Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
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Intel Core 2 Quad Q6600 Asustek P5Q-PRO Nvidia 9800 GTX+ Kingston DDR2 8gb 
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Western Digital 1 TB Pioneer Noctua NH-U9B Windows 7 Ultimate 64-bit 
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Dell Monitor Logitech G110 Antec 750W Thermaltake Aluminium Old Case 
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by benjamen50 View Post

You should keep it at 4.4 GHz 1.3V as it was tested stable. 100 MHz more might require a significant CPU voltage bump so it's not really surprising to see this happen. Some CPUs don't overclock well and require a lot more CPU voltage at certain higher clock speeds.


I take it you weren't paying attention to what the title said. I COULDN'T get it stable at 4.4ghz 1.3v, that's the whole point. It needed 1.355v to get stable at 4.4ghz whereas it was tested on the other system where i got the chip from to hit that same 4.4ghz at 1.3v before. The question was why there would be such a massive difference between two systems when my cooling was significantly better than his (mine has 1,280mm or radiators in a custom loop with Ek Supremacy EVO block; his was a 240mm Corsair H105). Not to mention this is a binned CPU, it's by far one of the best 6800K you can get, as most are limited to about 4.3ghz, and all but maybe ~20% of them only hit 4.4ghz at near 1.4v or higher. 4.5ghz capable ones are very rare, if you look at siliconlottery, they just now managed to get in TWO 4.5ghz ones after a couple months and they needed roughly 1.424v on each; and these are literally like the top 5-10% that hit that high.


Regardless though, i figured out the issue. It was a massive amount of real well hidden air bubbles in my water loop. There was one big one that lodged inside the CPU block that probably had the biggest effect. The only way i could get them out was to completely flip over my Caselabs SMA8 with everything in it (~40 pounds weight) and hold the reservoir up so the pump wasn't dry running. After getting the bubbles out my temps dropped from 80-85C under 100% load to around 55-60C at most when fully overclocked and overvolted. I can now do 4.4ghz at 1.31v, and i can do 4.5ghz at 1.39v, and even got 4.6ghz seemingly stable at 1.5v.
Edited by DarkIdeals - 7/14/16 at 12:45am
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
  hide details  
Reply
 
CPUMotherboardGraphicsRAM
i7 5960X ASUS Rampage V Extreme MSI GTX 1080 Gaming X 16GB Corsair Dominator Platinum 2666mhz DDR4 C15 
Hard DriveHard DriveOptical DriveCooling
PNY CS2211 MLC SATA III SSD WD Blue 500GB 7200rpm Writemaster DVD/CD +/- RW EK Supremacy EVO 
CoolingCoolingCoolingCooling
Mayhem's Pastel Ice White Coolant Coollaboratory Liquid Copper TIM XSPC EX480mm Radiator Black Ice GTX 360mm Radiator 
CoolingCoolingCoolingCooling
EK XTC 420mm Radiator Swiftech MCP655-B 12v Pump EK RES X3 250 Reservoir Bitspower/EK 3/8" x 1/2" Compression fitting 
OSMonitorMonitorKeyboard
Windows 8.1 ASUS ROG Swift PG278Q 27" 1440p 144hz G-Sync ASUS VG23AH 23.5" Passive 3d 1080p 60hz  Razer Blackwidow Chroma Tournament Edition 
PowerCaseMouseMouse Pad
EVGA Supernova G2 1000 Caselabs SMA8 -XXL Window, Ventilated sides/t... Razer Ouroboros Norman Rockwell collection series print Mousepad 
AudioAudio
Sennheiser HD700 300ohm Open Back Headphones SupremeFX Hi-Fi 5.25" Bay AMP/DAC  
  hide details  
Reply
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