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[OFFICIAL] Phenom II X4 9x5 OC Club - Page 411

post #4101 of 5692
This link has been posted before in this thread, but it was way back at the beginning. I thought it might be helpful for those of you wondering how high to OC your NB. I have a 955 and I took mine to 2.6 GHz with very little effort at all. There are sweet spots, but the only way to find it for your particular setup is through trial and error. Benchmark your system and test things out. Part of the fun of overclocking is in the testing and seeing what you can make the system do.

http://www.overclockers.com/the-impo...the-phenom-ii/
post #4102 of 5692
According to that advice, the CPUNB VID should not exceed 1.35v. However, i need a CPUNB VID of 1.4v in order for my ram to be P95 stable at 6-6-6-18-1t-1333mhz (the ram is rated 7-7-7-20-1t-1600mhz). Regardless of the CPUNB speed. Any ideas on why i need such high voltage and is it safe or likely will cause problems in a year or two?
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Phenom 955 (C2) GA-MA770T-UD3P Palit GTX260 216 Mushkin XP 996657 4GB DDR3 
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stuff n junk
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Hard DriveOptical DriveCoolingOS
WD 1TB BENQ DW1640 Arctic Freezer 7 pro Win 7 Ultimate 64bit 
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post #4103 of 5692
Thread Starter 
Quote:
Originally Posted by hazeus View Post
According to that advice, the CPUNB VID should not exceed 1.35v. However, i need a CPUNB VID of 1.4v in order for my ram to be P95 stable at 6-6-6-18-1t-1333mhz (the ram is rated 7-7-7-20-1t-1600mhz). Regardless of the CPUNB speed. Any ideas on why i need such high voltage and is it safe or likely will cause problems in a year or two?
It's safe till 1.55v, I run mine at 1.45v 24/7 Depending on your cooling, it should be fine, it's the same idea as a CPU overclock. Don't worry about it dude. The Northbridge will need more voltage depending on clocks and number of DIMMS
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post #4104 of 5692
Quote:
Originally Posted by Fear of Oneself View Post
It's safe till 1.55v, I run mine at 1.45v 24/7 Depending on your cooling, it should be fine, it's the same idea as a CPU overclock. Don't worry about it dude. The Northbridge will need more voltage depending on clocks and number of DIMMS

Thanks man.
stuff n junk
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CPUMotherboardGraphicsRAM
Phenom 955 (C2) GA-MA770T-UD3P Palit GTX260 216 Mushkin XP 996657 4GB DDR3 
Hard DriveOptical DriveCoolingOS
WD 1TB BENQ DW1640 Arctic Freezer 7 pro Win 7 Ultimate 64bit 
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LG 21" OCZ ModXStream Pro 700W Antec 300 Roccat Kova+ 
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stuff n junk
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CPUMotherboardGraphicsRAM
Phenom 955 (C2) GA-MA770T-UD3P Palit GTX260 216 Mushkin XP 996657 4GB DDR3 
Hard DriveOptical DriveCoolingOS
WD 1TB BENQ DW1640 Arctic Freezer 7 pro Win 7 Ultimate 64bit 
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LG 21" OCZ ModXStream Pro 700W Antec 300 Roccat Kova+ 
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post #4105 of 5692
With me, anything above 3.8 just isnt stable, no matter what voltage.. Could it be my motherboard's fault?
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post #4106 of 5692
Is your 955 a C2 Revision? Mine's a C2 and also can't get anything above 3.8 to be stable. tried FSB only, tried Multi + FSB in tons of combinations...no joy. highest stable was 3.793 lol
stuff n junk
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CPUMotherboardGraphicsRAM
Phenom 955 (C2) GA-MA770T-UD3P Palit GTX260 216 Mushkin XP 996657 4GB DDR3 
Hard DriveOptical DriveCoolingOS
WD 1TB BENQ DW1640 Arctic Freezer 7 pro Win 7 Ultimate 64bit 
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LG 21" OCZ ModXStream Pro 700W Antec 300 Roccat Kova+ 
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stuff n junk
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Hard DriveOptical DriveCoolingOS
WD 1TB BENQ DW1640 Arctic Freezer 7 pro Win 7 Ultimate 64bit 
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LG 21" OCZ ModXStream Pro 700W Antec 300 Roccat Kova+ 
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post #4107 of 5692
Got my 965 prime overnight stable yesterday, ill post a screenie of an hour occt run or something later, as well as my stats and voltages, etc
post #4108 of 5692
Hello, my first post here.

I need help. I'm trying to oc my 965 C2, but I can't get it stable even at stock.

On Prime 95 the third core always stop with that FATAL ERROR: Rounding was 0.5, expected less than 0,4.

The memory is at stock (8-8-8-24 at 1600mhz, 1.65v). I tested the modules one at a time with memtest86 for hours and it gave me no errors whatsoever. I think my Gigabyte MB doesn't like this ram (OCZ amd black edition), but I can't be sure.

However, the strangest thing is this: I run a dual-boot system (XP 64 / Win 7 64). On xp 64 it gaves me that fatal error. On win 7 I gives me a BOSD after 3 or 4 minutes. Remember I'm talking about stock speeds and voltages.

My temps are fine (less than 50c when running prime).

So, what do you think? Memory? Processor? MB? Dual Boot? I'm totally lost. I'd like some advice before replace anything.
post #4109 of 5692
Quote:
Originally Posted by ytsejam View Post
Hello, my first post here.

I need help. I'm trying to oc my 965 C2, but I can't get it stable even at stock.

On Prime 95 the third core always stop with that FATAL ERROR: Rounding was 0.5, expected less than 0,4.

The memory is at stock (8-8-8-24 at 1600mhz, 1.65v). I tested the modules one at a time with memtest86 for hours and it gave me no errors whatsoever. I think my Gigabyte MB doesn't like this ram (OCZ amd black edition), but I can't be sure.

However, the strangest thing is this: I run a dual-boot system (XP 64 / Win 7 64). On xp 64 it gaves me that fatal error. On win 7 I gives me a BOSD after 3 or 4 minutes. Remember I'm talking about stock speeds and voltages.

My temps are fine (less than 50c when running prime).

So, what do you think? Memory? Processor? MB? Dual Boot? I'm totally lost. I'd like some advice before replace anything.
try prime small fft, which will stress the cpu mostly and ram very little

also, ive read alot of reviews that the OCD ram you have not running well...someone just posted that at the gigabyte890fx owners thread on here...

also try running the RAM at 1333 mhz and 8-8-8-24-1t timings and run prime blend and see if it still is failing

good luck!
post #4110 of 5692
Hullo. Got my own CPU to a decent overclock. Not stable unfortunately (after an hour of prime95 it crashed), however it hasn't shown any issues while gaming or elsewhere...


Freq: 3800
Ref*multi: 200.9*19
vcore: 1.42
Stepping: C2
CPU/NB Voltage: stock
NB Freq: 2000
NB Voltage: i forget, and cpuID isn't showing, silly thing. I think it's 0.025v increase though.
Ram/Type/Speed/Timings: 4GB DDR2 1066MHz 5-7-7-24
Motherboard: GA-MA790FX-UD5P
Bios: F5
Cooling/Cooler: Liquid/Corsair H50
OS: 7 pro x64
Platform: AM2+
Stable: No

hovering around 39c idle~
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