Overclock.net › Forums › AMD › AMD CPUs › C3 Phenom ii x4 955 Black Edition 3.8GHz Overclock
New Posts  All Forums:Forum Nav:

C3 Phenom ii x4 955 Black Edition 3.8GHz Overclock

post #1 of 13
Thread Starter 
Hi. I'm new to overclock.net and I just need a little bit of help overclocking my Phenom ii x4 955 Black Edition to 3.8GHz. I have an Asus M4a785td-v EVO motherboard. Revision is RB-C3
My power supply is a Coolermaster Silent Pro 700W power supply.
I have two 120mm and one 140mm fan sucking air into my case (Coolermaster CM Storm Scout, good cable management too) and two 120mm fans blowing warm air out of the case, these are above and next to my CPU cooler, which is an Arctic Cooling Freezer Pro Rev.2 9.2cm fan. I have the second from latest BIOS for my motherboard, the latest one just gives it compatibility for Phenom ii x6 processors.

My motherboard's BIOS says that my CPU is the C3 revision, so I was expecting a decent overclock but I try not to take things for granted. I can get to 3.7GHz stable, but I have to put the voltage up to 1.4V, and 3.6GHz stable on 1.35V. Overheating isn't an issue for me at this level of overclocking (50C max load, 24C idle @3.7GHz). My problem is that I have to put my voltage up to 1.5V to get a stable 3.8GHz overclock and I'm not comfortable putting my voltage up this high, since the maximum voltage rating is 1.5V. I don't want to damage my CPU.

I was wondering how others could easily achieve 3.8 to 4.1GHz on stock voltage with the C3 stepping, whereas I have to greatly increase the voltage even with my CPU being the C3 stepping. Bad CPU? Or are there other voltages which can affect stability? I keep my RAM and NB frequencies at stock with stock voltages. Only things I change are CPU multiplier and CPU voltage.

TL;DR
Are there voltages that affect stability apart from CPU voltage, even if you keep other frequencies at stock?
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
post #2 of 13
I needed to get my NB up to around 2600 to get stable at voltage I was comfortable with (4.0 @ 1.42). Go back to stock, get your NBF higher and stable, then start working your way up from there.
A little thing that helped me was to take a shot of the setting each time it passed a stress test. That way, if one of the changes I was working on, didn't help me get to a higher overclock, It was easier for me to see what my setting were a few changes back.
Farragut's Folly
(14 items)
 
Water Scout
(13 items)
 
Venomous X
(13 items)
 
CPUMotherboardGraphicsRAM
2500k 4.8 1.43v and rising ASRock P67 Extreme6 HD 5830 G Skill Ripjaws X 2133 
Hard DriveCoolingOSMonitor
WD Caviar Green 750GB Noctua D-14 Ubuntu 10.10 64 bit Acer G205HBbd 
PowerCase
Seasonic x750 HAF 932 
CPUMotherboardGraphicsRAM
2600K 4.8ghz 1.39v ASRock Extreme6 GTX460 4Gb 2133 
Hard DriveOS
500 mb Linux Mint 64 bit 
CPUMotherboardRAMHard Drive
2600K 4.6ghz 1.35v ASRock Extreme4 2x2Gb 1600MHz 250 GB 
OS
Linux Mint 64 bit 
  hide details  
Reply
Farragut's Folly
(14 items)
 
Water Scout
(13 items)
 
Venomous X
(13 items)
 
CPUMotherboardGraphicsRAM
2500k 4.8 1.43v and rising ASRock P67 Extreme6 HD 5830 G Skill Ripjaws X 2133 
Hard DriveCoolingOSMonitor
WD Caviar Green 750GB Noctua D-14 Ubuntu 10.10 64 bit Acer G205HBbd 
PowerCase
Seasonic x750 HAF 932 
CPUMotherboardGraphicsRAM
2600K 4.8ghz 1.39v ASRock Extreme6 GTX460 4Gb 2133 
Hard DriveOS
500 mb Linux Mint 64 bit 
CPUMotherboardRAMHard Drive
2600K 4.6ghz 1.35v ASRock Extreme4 2x2Gb 1600MHz 250 GB 
OS
Linux Mint 64 bit 
  hide details  
Reply
post #3 of 13
I always set my RAM to a setting lower than its stock. So set your RAM to 1066 just to get that out of the way because it could be your ram causing the instability.

Like curve in said, it usually helps to raise the north bridge feq to 2600 or higher. AM3s get a decent benefit from the overclock as well. Just make sure your keep your HT Link as close to 2000mhz as you can. When overclocking your NB, make sure you raise the voltage of your cpu/nb value. I can get 2800ish at 1.31v, it varies but your should shoot for that range if you can.

Seeing as you have a C3 you should be able to hit 3.8 at ~1.45v but not always, it depends on your cpu. I can get 3.78 at 1.48v on a C2 but I cannot get 3.9 unless i up the voltage to 1.54 which is too high for my personal liking. Just fyi, AMD says 1.55 is the max voltage for Phenom IIs.
post #4 of 13
Thread Starter 
Thank you both for the replies, I didn't know upping the NB frequency improved stability, how silly of me biggrin.gif

Will try and see what I can do.

Edit:
HT ref. clock 200MHz
Voltage at 1.375V
Multiplier at 18.5 for 3.7GHz
NB frequency at 2800MHz
HT link on auto, it went down to 1600MHz. (will this affect stability)
RAM all the way down to 533MHz to ensure that it's not causing any instability.

I'll see if these settings are stable with a few Intel Burn tests.
Edited by Edge Of Pain - 5/16/11 at 9:54am
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
post #5 of 13
Quote:
Originally Posted by Edge Of Pain;13525332 
Thank you both for the replies, I didn't know upping the NB frequency improved stability, how silly of me biggrin.gif

Will try and see what I can do.

Edit:
HT ref. clock 200MHz
Voltage at 1.375V
Multiplier at 18.5 for 3.7GHz
NB frequency at 2800MHz
HT link on auto, it went down to 1600MHz. (will this affect stability)
RAM all the way down to 533MHz to ensure that it's not causing any instability.

I'll see if these settings are stable with a few Intel Burn tests.

As far as I'm aware you should aim to keep your HT link around 2000 (set it manually to the closest setting to it). This was what I was advised for my 965BE, though I'm not sure if the same holds true for the 955.
War Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 3.4ghz Asus B85M Gamer MSI Twin Frozr V R9 390X 8gb Kingston Hyper X Beast 16gb 
Hard DriveCoolingCoolingOS
HGS 2.5" Sata 1tb Corsair H100i v2 4 x Corsair SP120 Quiet Windows 10 64bit 
MonitorKeyboardPowerCase
Benq RL2455 Microsoft Sidewinder X4 EVGA Supernova G2 750w Corsair Carbide Air 240 
MouseMouse PadAudio
Razer Naga Molten Edition Steel Series Guild Wars 2 Sennheiser HD201 
  hide details  
Reply
War Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 3.4ghz Asus B85M Gamer MSI Twin Frozr V R9 390X 8gb Kingston Hyper X Beast 16gb 
Hard DriveCoolingCoolingOS
HGS 2.5" Sata 1tb Corsair H100i v2 4 x Corsair SP120 Quiet Windows 10 64bit 
MonitorKeyboardPowerCase
Benq RL2455 Microsoft Sidewinder X4 EVGA Supernova G2 750w Corsair Carbide Air 240 
MouseMouse PadAudio
Razer Naga Molten Edition Steel Series Guild Wars 2 Sennheiser HD201 
  hide details  
Reply
post #6 of 13
Thread Starter 
Quote:
Originally Posted by Lifeshield;13525671 
As far as I'm aware you should aim to keep your HT link around 2000 (set it manually to the closest setting to it). This was what I was advised for my 965BE, though I'm not sure if the same holds true for the 955.

Apparently the 965BE and the 955 BE are the same chip.

I did what you said and tried the following settings:
Multiplier on 18.5 to get 3.7GHz
CPU voltage at 1.375V
RAM at 533MHz, to ensure it wasn't causing instability
HT link at 2000MHz
NB at 2800MHz

Intel burn test, didn't even get through 1 test before crashing, started reaching high temps too (nearly 60C).
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
post #7 of 13
You might want to try upping the vcore. Mine is stable at 3.8ghz on 1.4375v. NB set at 2600mhz on I believe 1.25v. The max vcore on the 955 should be around 1.55v. What type of temps were you getting when you had your vcore to 1.5v?
Flush
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5Ghz Asus P8P67 MSI TFIII PE/OC HD 6950 2GB Corsair XMS3 8GB DDR3 
Hard DriveOSMonitorKeyboard
Intel 520 Series SSD 180GB, Western Digital Bla... Windows 7 64-bit Dell 23" S2309W & 19" 1905FP Das Keyboard Brown 
PowerCaseMouseMouse Pad
Antec NEO ECO 620W Antec 300 Illusion Razer DeathAdder Steelseries QcK 
  hide details  
Reply
Flush
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5Ghz Asus P8P67 MSI TFIII PE/OC HD 6950 2GB Corsair XMS3 8GB DDR3 
Hard DriveOSMonitorKeyboard
Intel 520 Series SSD 180GB, Western Digital Bla... Windows 7 64-bit Dell 23" S2309W & 19" 1905FP Das Keyboard Brown 
PowerCaseMouseMouse Pad
Antec NEO ECO 620W Antec 300 Illusion Razer DeathAdder Steelseries QcK 
  hide details  
Reply
post #8 of 13
Thread Starter 
Well, when Vcore voltage was at 1.5V, HT link was at 1.2V and 2000MHz, NB was at 2000MHz with auto voltage, and multiplier was 19 to get 3.8GHz, I was getting temps of around 58 to 60C, stable. But with Multiplier on 18.5 to get 3.7GHz, CPU voltage at 1.375V, HT link at 2000MHz, NB at 2800MHz with 1.205V, it was getting to similar temps and unstable. The thing is I don't want to touch 1.5V on my CPU.

However, when everything was left on auto/stock voltages and frequencies with 3.7GHz and a CPU voltage of 1.4V, I was getting max temps of like 50 to 52C (although ambient temp was like 20C at the time, now it's around 22C)
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
Servant of Sigmar
(11 items)
 
RedHax0r V2
(11 items)
 
 
CPUMotherboardGraphicsRAM
i7-7700K Gigabyte GA-Z270-HD3P Zotac GeForce GTX 1070 AMP Extreme 32GB Corsair Vengeance LPX 3000MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 240GB ADATA SSD Samsung Be Quiet! Pure Rock Slim 
OSPowerCase
Windows 10 64 Bit Seasonic 520W Non-modular Aerocool Aero 800 white 
CPUMotherboardGraphicsRAM
R5 1500X Asus Prime B350 Plus Sapphire RX 480 Kingston HyperX Fury 16GB DDR4 2400MHz 
Hard DriveHard DriveOptical DriveCooling
120GB Sandisk SSD 1TB WD Blue Yes AMD Wraith Spire 
OSPowerCase
Windows 10 64 Bit Corsair CS430 Antec VSK 4000B 
  hide details  
Reply
post #9 of 13
What I did with my overclock was set all voltages to auto, and just manually increased the FSB and multiplier (FSB first, then increase the multiplier) while manually setting the HT Link to around 2000 (give or take 100).

Like this I managed to hit 4ghz with my FSB at 250. My voltage on my CPU is around 1.45-1.46 at 100% load with max temperatures of 43 degrees.
War Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 3.4ghz Asus B85M Gamer MSI Twin Frozr V R9 390X 8gb Kingston Hyper X Beast 16gb 
Hard DriveCoolingCoolingOS
HGS 2.5" Sata 1tb Corsair H100i v2 4 x Corsair SP120 Quiet Windows 10 64bit 
MonitorKeyboardPowerCase
Benq RL2455 Microsoft Sidewinder X4 EVGA Supernova G2 750w Corsair Carbide Air 240 
MouseMouse PadAudio
Razer Naga Molten Edition Steel Series Guild Wars 2 Sennheiser HD201 
  hide details  
Reply
War Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i5 4670k @ 3.4ghz Asus B85M Gamer MSI Twin Frozr V R9 390X 8gb Kingston Hyper X Beast 16gb 
Hard DriveCoolingCoolingOS
HGS 2.5" Sata 1tb Corsair H100i v2 4 x Corsair SP120 Quiet Windows 10 64bit 
MonitorKeyboardPowerCase
Benq RL2455 Microsoft Sidewinder X4 EVGA Supernova G2 750w Corsair Carbide Air 240 
MouseMouse PadAudio
Razer Naga Molten Edition Steel Series Guild Wars 2 Sennheiser HD201 
  hide details  
Reply
post #10 of 13
Quote:
Originally Posted by Edge Of Pain;13525804 
I did what you said and tried the following settings:
Multiplier on 18.5 to get 3.7GHz
CPU voltage at 1.375V
RAM at 533MHz, to ensure it wasn't causing instability
HT link at 2000MHz
NB at 2800MHz

Intel burn test, didn't even get through 1 test before crashing, started reaching high temps too (nearly 60C).

Take a step back. Start at stock settings and slowly make changes. I'd went way down in volts first - 1.3. Then I upped the NBF first, then the RAM. What works for my board and chip, might not be the best for you. Everyone with a 955BE can get to 3.7 with just the multiplier and volts, going over that takes more changes. Here's a screen shot of what worked for me before I went down a step in vcore. This is just to give you an idea of what range you might want to work towards.

5726977253_e2d755ca85_z.jpg
Farragut's Folly
(14 items)
 
Water Scout
(13 items)
 
Venomous X
(13 items)
 
CPUMotherboardGraphicsRAM
2500k 4.8 1.43v and rising ASRock P67 Extreme6 HD 5830 G Skill Ripjaws X 2133 
Hard DriveCoolingOSMonitor
WD Caviar Green 750GB Noctua D-14 Ubuntu 10.10 64 bit Acer G205HBbd 
PowerCase
Seasonic x750 HAF 932 
CPUMotherboardGraphicsRAM
2600K 4.8ghz 1.39v ASRock Extreme6 GTX460 4Gb 2133 
Hard DriveOS
500 mb Linux Mint 64 bit 
CPUMotherboardRAMHard Drive
2600K 4.6ghz 1.35v ASRock Extreme4 2x2Gb 1600MHz 250 GB 
OS
Linux Mint 64 bit 
  hide details  
Reply
Farragut's Folly
(14 items)
 
Water Scout
(13 items)
 
Venomous X
(13 items)
 
CPUMotherboardGraphicsRAM
2500k 4.8 1.43v and rising ASRock P67 Extreme6 HD 5830 G Skill Ripjaws X 2133 
Hard DriveCoolingOSMonitor
WD Caviar Green 750GB Noctua D-14 Ubuntu 10.10 64 bit Acer G205HBbd 
PowerCase
Seasonic x750 HAF 932 
CPUMotherboardGraphicsRAM
2600K 4.8ghz 1.39v ASRock Extreme6 GTX460 4Gb 2133 
Hard DriveOS
500 mb Linux Mint 64 bit 
CPUMotherboardRAMHard Drive
2600K 4.6ghz 1.35v ASRock Extreme4 2x2Gb 1600MHz 250 GB 
OS
Linux Mint 64 bit 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › C3 Phenom ii x4 955 Black Edition 3.8GHz Overclock