Overclock.net › Forums › AMD › AMD CPUs › fx-8350 voltage help
New Posts  All Forums:Forum Nav:

fx-8350 voltage help

post #1 of 10
Thread Starter 
Alright guys so here's whats happening. Back in November i picked up a fx-8350 and a gigabyte 990fxa-ud3 ( also a h100i cooler) and i overclocked it to 4.8ghz and i've been running like that ever since with no problems. Now for some reason i have the urge to push my cpu to 5ghz. Currently i have my vcore at 1.5v and i was told not to go over 1.5v for 24/7 use. My question is should i push my voltage any higher because i know my cpu can get an extra 200mhz and if so what is the absolute max voltage i should use before i significantly reduce the lifespan of my cpu? If you have any other bios setting suggestions that'll help with this that would also be appreciated.
post #2 of 10
1.5 v for 4.8 GHz sounds high. I wouldn't be going any higher.
Got my FX 6300 to 5.03 GHz on 1.464v
And you'll find that the extra 200 mhz is going to make massive amounts of heat.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
post #3 of 10
I have a FX 8350, Asus Crosshair V Formula-Z, and a H100i. Not sure about you but I have cooling for my VRM and Socket. These are recent temps I got while running IBT Max. 4.8GHz @1.464v got me Max Core/Socket temps of 58C/52C. 4.9GHz @1.512v got 63C/59C. Another thing to note, .006v can make a difference in temps. For example I'm using offset voltages right now, and those 4.9GHz temps were with an offset of .243v. By raising the offset vcore by .006 (.25v) my max temps were 4-5C hotter. In my opinion if you need 1.5v for 4.8GHz then you will probably need more than 1.55v for 5GHz stable. For Vishera's you can use 1.6v and CPU should still last several years (without some unknown disaster) problem is being able to cool the CPU and I don't think an H100i is enough to cool voltages of an 8-core at 1.55v and beyond without going over the max recommended temps. People talk about chips dieing prematurely when using higher voltage but unless you plan to keep the CPU for 10+ years the CPU should still be alive and running well if you can keep it cool at 1.5-1.55v. Same can probably be applied with even higher voltage. AMD chose 1.5 or 1.55v as the max voltage for bulldozer but didn't say anything for Vishera. Unless the max voltage has changed dramatically from bulldozer to piledriver running 1.5 should be safe.

If I were to try predicting the outcome of you OCing to 5GHz stable I predict your temps rising by at least 10C IMO and that's at the 'least'.
Edited by xKrNMBoYx - 3/26/15 at 10:17pm
Primary Gaming
(16 items)
 
Secondary Gaming
(13 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Xeon E3-1275 V5 Asrock E3V5 Performance Gaming/OC EVGA Classified 980 Ti SC EVGA 750 Ti SC 
RAMHard DriveHard DriveCooling
Kingston FuryX Black Intel 530 Seagate ST500LM021 Noctua NH-D15 
CoolingCoolingOSMonitor
Noctua NF-A15 Noctua NF-F12 Windows 10 Pro 64-Bit Samsung 42" Plasma 
KeyboardPowerCaseMouse
Razer Black Widow 2014 EVGA 750 GQ 80+ Gold NZXT H440 Razer Death Adder 2014 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1055T ECS A885GM-A2 EVGA GTX 750 Ti SC Corsair XMS3 
Hard DriveHard DriveHard DriveCooling
Adata 60GB SP Western Digital Blue 320GB Hitachi 750GB Corsair H60 
OSKeyboardPowerCase
Windows 8.1 64-Bit Razer Black Widow Cooler Master Silent Pro M2 620W Antec Three Hundred 
Mouse
Razer Death Adder 3.5G 
  hide details  
Reply
Primary Gaming
(16 items)
 
Secondary Gaming
(13 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Xeon E3-1275 V5 Asrock E3V5 Performance Gaming/OC EVGA Classified 980 Ti SC EVGA 750 Ti SC 
RAMHard DriveHard DriveCooling
Kingston FuryX Black Intel 530 Seagate ST500LM021 Noctua NH-D15 
CoolingCoolingOSMonitor
Noctua NF-A15 Noctua NF-F12 Windows 10 Pro 64-Bit Samsung 42" Plasma 
KeyboardPowerCaseMouse
Razer Black Widow 2014 EVGA 750 GQ 80+ Gold NZXT H440 Razer Death Adder 2014 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1055T ECS A885GM-A2 EVGA GTX 750 Ti SC Corsair XMS3 
Hard DriveHard DriveHard DriveCooling
Adata 60GB SP Western Digital Blue 320GB Hitachi 750GB Corsair H60 
OSKeyboardPowerCase
Windows 8.1 64-Bit Razer Black Widow Cooler Master Silent Pro M2 620W Antec Three Hundred 
Mouse
Razer Death Adder 3.5G 
  hide details  
Reply
post #4 of 10
I definitely wouldn't be going over 1.5vcore, unless you want to chip to die prematurely. Even 1.5v is too high for my liking, I'd only ever maybe go 1.45v,
Defiance
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel 6600K Asus ROG Maximum VIII Ranger Powercolor R9 280x Turbo Duo Corsair Vengeance LPX 3200mhz 16GB 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 EVO 250GB Western Digital 3TB Black 1TB External HDD External Optical Drive 
CoolingOSKeyboardPower
Noctua NH-D15 Windows 10 Microsoft Sidewinder X4 Corsair HX750i 
CaseMouseMouse Pad
NZXT H440 Black/Red Deathadder Chrome Turtlebeach Drift  
  hide details  
Reply
Defiance
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel 6600K Asus ROG Maximum VIII Ranger Powercolor R9 280x Turbo Duo Corsair Vengeance LPX 3200mhz 16GB 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 EVO 250GB Western Digital 3TB Black 1TB External HDD External Optical Drive 
CoolingOSKeyboardPower
Noctua NH-D15 Windows 10 Microsoft Sidewinder X4 Corsair HX750i 
CaseMouseMouse Pad
NZXT H440 Black/Red Deathadder Chrome Turtlebeach Drift  
  hide details  
Reply
post #5 of 10
Thread Starter 
Quote:
Originally Posted by billbartuska View Post

1.5 v for 4.8 GHz sounds high. I wouldn't be going any higher.
Got my FX 6300 to 5.03 GHz on 1.464v
And you'll find that the extra 200 mhz is going to make massive amounts of heat.
its actually 1.48v and i had it on 1.464v but i turned it up to be safe.
post #6 of 10
Thread Starter 
Quote:
Originally Posted by xKrNMBoYx View Post

I have a FX 8350, Asus Crosshair V Formula-Z, and a H100i. Not sure about you but I have cooling for my VRM and Socket. These are recent temps I got while running IBT Max. 4.8GHz @1.464v got me Max Core/Socket temps of 58C/52C. 4.9GHz @1.512v got 63C/59C. Another thing to note, .006v can make a difference in temps. For example I'm using offset voltages right now, and those 4.9GHz temps were with an offset of .243v. By raising the offset vcore by .006 (.25v) my max temps were 4-5C hotter. In my opinion if you need 1.5v for 4.8GHz then you will probably need more than 1.55v for 5GHz stable. For Vishera's you can use 1.6v and CPU should still last several years (without some unknown disaster) problem is being able to cool the CPU and I don't think an H100i is enough to cool voltages of an 8-core at 1.55v and beyond without going over the max recommended temps. People talk about chips dieing prematurely when using higher voltage but unless you plan to keep the CPU for 10+ years the CPU should still be alive and running well if you can keep it cool at 1.5-1.55v. Same can probably be applied with even higher voltage. AMD chose 1.5 or 1.55v as the max voltage for bulldozer but didn't say anything for Vishera. Unless the max voltage has changed dramatically from bulldozer to piledriver running 1.5 should be safe.

If I were to try predicting the outcome of you OCing to 5GHz stable I predict your temps rising by at least 10C IMO and that's at the 'least'.

I don't think temps will be an issue with my cpu as my max temp i was able to hit on prime95 after an hour of testing was 48-50C, i was just wondering about the voltages.
post #7 of 10
Quote:
Originally Posted by Arcanine300 View Post

[quote name="xKrNMBoYx" url="/t/1548226/fx-8350-voltage-help#post_23722052I don't think temps will be an issue with my cpu as my max temp i was able to hit on prime95 after an hour of testing was 48-50C, i was just wondering about the voltages.
You;re going to be amazed.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
Reply
post #8 of 10
Quote:
Originally Posted by Arcanine300 View Post

I don't think temps will be an issue with my cpu as my max temp i was able to hit on prime95 after an hour of testing was 48-50C, i was just wondering about the voltages.

Bartuska is correct. That 200 MHz may take a lot of voltage and as a result the heat will jump quite a bit. I bet your socket temps will be quite a bit higher.
post #9 of 10
Thread Starter 
Quote:
Originally Posted by chrisjames61 View Post

Bartuska is correct. That 200 MHz may take a lot of voltage and as a result the heat will jump quite a bit. I bet your socket temps will be quite a bit higher.

I managed to get 4.9ghz no problem and my temps only went up by 2C but no matter how much voltage i put through it i could not get 5ghz stable under prime but i did get cinebench to run. Is there anything i could do that might make 5ghz stable?
post #10 of 10
How high did you try the voltage? I've heard that raising CPU/NB voltage a little might help out with a somewhat stuck OC. Hopefully you're OCing CPU first and your memory is at stock speed and timings also. Another thing is if voltage drops by a significant number even for a fraction of a second stress/stability testing programs will give you a fail. Are you using any LLC?
Primary Gaming
(16 items)
 
Secondary Gaming
(13 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Xeon E3-1275 V5 Asrock E3V5 Performance Gaming/OC EVGA Classified 980 Ti SC EVGA 750 Ti SC 
RAMHard DriveHard DriveCooling
Kingston FuryX Black Intel 530 Seagate ST500LM021 Noctua NH-D15 
CoolingCoolingOSMonitor
Noctua NF-A15 Noctua NF-F12 Windows 10 Pro 64-Bit Samsung 42" Plasma 
KeyboardPowerCaseMouse
Razer Black Widow 2014 EVGA 750 GQ 80+ Gold NZXT H440 Razer Death Adder 2014 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1055T ECS A885GM-A2 EVGA GTX 750 Ti SC Corsair XMS3 
Hard DriveHard DriveHard DriveCooling
Adata 60GB SP Western Digital Blue 320GB Hitachi 750GB Corsair H60 
OSKeyboardPowerCase
Windows 8.1 64-Bit Razer Black Widow Cooler Master Silent Pro M2 620W Antec Three Hundred 
Mouse
Razer Death Adder 3.5G 
  hide details  
Reply
Primary Gaming
(16 items)
 
Secondary Gaming
(13 items)
 
 
CPUMotherboardGraphicsGraphics
Intel Xeon E3-1275 V5 Asrock E3V5 Performance Gaming/OC EVGA Classified 980 Ti SC EVGA 750 Ti SC 
RAMHard DriveHard DriveCooling
Kingston FuryX Black Intel 530 Seagate ST500LM021 Noctua NH-D15 
CoolingCoolingOSMonitor
Noctua NF-A15 Noctua NF-F12 Windows 10 Pro 64-Bit Samsung 42" Plasma 
KeyboardPowerCaseMouse
Razer Black Widow 2014 EVGA 750 GQ 80+ Gold NZXT H440 Razer Death Adder 2014 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1055T ECS A885GM-A2 EVGA GTX 750 Ti SC Corsair XMS3 
Hard DriveHard DriveHard DriveCooling
Adata 60GB SP Western Digital Blue 320GB Hitachi 750GB Corsair H60 
OSKeyboardPowerCase
Windows 8.1 64-Bit Razer Black Widow Cooler Master Silent Pro M2 620W Antec Three Hundred 
Mouse
Razer Death Adder 3.5G 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › fx-8350 voltage help