Max safe Voltage allowed on 955BE w/ C3 stepping

soulwatch5 · 07-22-10, 11:01 AM

I'm trying to hit the 4.0Ghz mark but stuck at 3.9Ghz right now. If i set the cpu to 4.0 with 1.40 volts I can boot but when I run OCCT I error out like 20 minutes into it. Load temps hit up to 54C. I figured if i just up the voltage a little I might be able to pass the stability tests but not sure what is considered safe voltage range for the CPU. Most threads I've seen about overclocking this CPU have it up to as high as 1.50-1.60 but that is 955BE with C2 stepping. I have the C3 stepping chip and not sure if they have the same voltage ranges.

Thanks

QuietIce · 07-23-10, 12:55 AM

Even AMD says the safe range is 0.825-1.425v. Personally I'd consider 1.45 (maybe 1.475v with good temps) to be the top unless you're under water, then I'd go 1.50-1.525v depending on temps. As it is it's probably your temps holding you back so raising the vCore may make things worse but, hey, it's worth a try ...

Awptex · 07-23-10, 02:36 AM

I would not go over 1.45V

Thomas73 · 07-24-10, 02:50 PM

Are any of the voltage here too high?I know nuts about voltage and normally leave them on auto.I am running a 955 c3@3800mhz 19x200/2600mhz nb/ht link/ddr3 1600mhz.Please advice how I should set the voltage for stability.
CPU:1.45V
CPU/NB:1.40V
CPU/VDDA:2.49V
DRAM:1.65V
HT:1.20V
NB:1.11V
NB 1.8V:1.81V
SB:1.20V
3.3V:3.45V
5V:4.97V
12V:12.45V
Thanks in advance

Nebulous · 07-24-10, 02:52 PM

Quote:

Originally Posted by Thomas73

Are any of the voltage here too high?I know nuts about voltage and normally leave them on auto.I am running 3800mhz 19x200/2600mhz nb/ht link/ddr3 1600mhz.Please advice how I should set the voltage for stability.
CPU:1.45V
CPU/NB:1.40V
CPU/VDDA:2.49V
DRAM:1.65V
HT:1.20V
NB:1.11V
NB 1.8V:1.81V
SB:1.20V
3.3V:3.45V
5V:4.97V
12V:12.45V
Thanks in advance

Voltages are fine. Next time it's advisable you create a new thread and not piggy back on someone else's

trents · 07-24-10, 03:03 PM

CPUNB is too high IMO. I would bring it back down to 1.225.

Quote:

Originally Posted by Thomas73

Are any of the voltage here too high?I know nuts about voltage and normally leave them on auto.I am running a 955 c3@3800mhz 19x200/2600mhz nb/ht link/ddr3 1600mhz.Please advice how I should set the voltage for stability.
CPU:1.45V
CPU/NB:1.40V
CPU/VDDA:2.49V
DRAM:1.65V
HT:1.20V
NB:1.11V
NB 1.8V:1.81V
SB:1.20V
3.3V:3.45V
5V:4.97V
12V:12.45V
Thanks in advance

Thomas73 · 07-24-10, 03:08 PM

Thanks for the tip

Awesome lowered the cpu/nb volt to 1.225v & got a 4c drop in cpu temp & 3c drop in nb

soulwatch5 · 07-31-10, 12:43 AM

Dude I just did. Finally got a stable 4.0Ghz. 4018Mhz with a NB frequency of 2612Mhz to be exact. It was the heat wall that was holding me back. I finally received a set of fan clips for my Venomous X, through thermalright, which allowed me to set up a push/pull system and was able to drop my load temps down 4-5C. (That and figured out in the bios how to turn off the Auto Smart Fan Control and run all the system fans at 100%)

Didn't have to up my voltage at all, just had to lower the temp a bit.
Vcore:1.40
CPU NB: 1.200

I just finished a hour OCCT Linpack test without any errors while before running that test would cause a crash within 5-10 minutes. Going to start a 8hour prime95 blend test tonight just to be safe but if it passed the Linpack i'm pretty sure its going to pass the blend.

Uploaded with ImageShack.us

07-22-10, 11:01 AM	Thread Starter #1
soulwatch5 Member Join Date: Jun 2010 Location: Burbank, CA	Max safe Voltage allowed on 955BE w/ C3 stepping I'm trying to hit the 4.0Ghz mark but stuck at 3.9Ghz right now. If i set the cpu to 4.0 with 1.40 volts I can boot but when I run OCCT I error out like 20 minutes into it. Load temps hit up to 54C. I figured if i just up the voltage a little I might be able to pass the stability tests but not sure what is considered safe voltage range for the CPU. Most threads I've seen about overclocking this CPU have it up to as high as 1.50-1.60 but that is 955BE with C2 stepping. I have the C3 stepping chip and not sure if they have the same voltage ranges. Thanks __________________ Haf 922 Asrock z77 extreme6 i7 3770k @4.5ghz 8g Gskill @1600Mhz Intel 520 SSD EVGA GTX 680 Corsair HX1000 Heatware
	QUOTE Thanks

07-23-10, 12:55 AM	#2
QuietIce Disabled Join Date: May 2006 Location: Anywhere but there	Even AMD says the safe range is 0.825-1.425v. Personally I'd consider 1.45 (maybe 1.475v with good temps) to be the top unless you're under water, then I'd go 1.50-1.525v depending on temps. As it is it's probably your temps holding you back so raising the vCore may make things worse but, hey, it's worth a try ...
	QUOTE Thanks

07-23-10, 02:36 AM	#3
Awptex Member Join Date: Jan 2010 Location: Canada, sk ,regina	I would not go over 1.45V __________________ CPU: AMD Phenom II 965 @ 4017MHz \| MB: Asus M4A88TD-V EVO USB3 \| GFX: EVGA GTX 470 SC \| Ram: Corsair Dominator XMS3 4X1 1800Mhz 7-7-7-20 \| PSU: Cooler Master 1250W \| Cooling: CNPS Performa \| Display1: Asus VE248 \| Display2: Asus AL1916W \| SSD: 60GB OCZ Vertex 2 \| HDD1: 500GB WD \| HDD2: 500GB WD \| Case: Antec Gaming Twelve Hundred \| Keyboard: Razer Blackwidow \| Mouse: Razer DeathAdder \| Sound Card: X-FI Titanium Pro \| Headset: Siberia V2 \| Operating System: Windows 7 64 Bit
	QUOTE Thanks

07-24-10, 02:50 PM	#4
Thomas73 Disabled Join Date: Jul 2010 Location: Singapore	Are any of the voltage here too high?I know nuts about voltage and normally leave them on auto.I am running a 955 c3@3800mhz 19x200/2600mhz nb/ht link/ddr3 1600mhz.Please advice how I should set the voltage for stability. CPU:1.45V CPU/NB:1.40V CPU/VDDA:2.49V DRAM:1.65V HT:1.20V NB:1.11V NB 1.8V:1.81V SB:1.20V 3.3V:3.45V 5V:4.97V 12V:12.45V Thanks in advance
	QUOTE Thanks

07-24-10, 03:08 PM	#7
Thomas73 Disabled Join Date: Jul 2010 Location: Singapore	Thanks for the tipAwesome lowered the cpu/nb volt to 1.225v & got a 4c drop in cpu temp & 3c drop in nb Last edited by Thomas73; 07-24-10 at 03:17 PM.
	QUOTE Thanks

Max safe Voltage allowed on 955BE w/ C3 stepping

Internet Services

Website Development

Tech Hardware

07-31-10, 12:43 AM	Thread Starter #8
soulwatch5 Member Join Date: Jun 2010 Location: Burbank, CA	Dude I just did. Finally got a stable 4.0Ghz. 4018Mhz with a NB frequency of 2612Mhz to be exact. It was the heat wall that was holding me back. I finally received a set of fan clips for my Venomous X, through thermalright, which allowed me to set up a push/pull system and was able to drop my load temps down 4-5C. (That and figured out in the bios how to turn off the Auto Smart Fan Control and run all the system fans at 100%) Didn't have to up my voltage at all, just had to lower the temp a bit. Vcore:1.40 CPU NB: 1.200 I just finished a hour OCCT Linpack test without any errors while before running that test would cause a crash within 5-10 minutes. Going to start a 8hour prime95 blend test tonight just to be safe but if it passed the Linpack i'm pretty sure its going to pass the blend. Uploaded with ImageShack.us __________________ Haf 922 Asrock z77 extreme6 i7 3770k @4.5ghz 8g Gskill @1600Mhz Intel 520 SSD EVGA GTX 680 Corsair HX1000 Heatware
	QUOTE Thanks

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search