AMD Overclocking Club

[redhatownage]

Cpu: 555
Name: redhatownage
Stepping: C3
Frequency: 4380.21
ref*multi: 292.01 * 15
CPU voltage: 1.666
CPU-NB: 1.9
nb frequency: 2900
NB volts: 1.2
RAM: 584 MHz (1:2) @ 4-4-4-5
Motherboard: DFI LP DK 790FXB-M2RS
Cooling: redhat custom dice pot
OS: 7
GFLOPS: over 9000
http://valid.canardpc.com/show_oc.php?id=1130926

 

[battlecryawesome]

Very nice..

 

[topdog]

Cpu: 960T
Name: topdog
Stepping: E0
Frequency: 6573.00
ref*multi: 239*27.5
CPU voltage: 1.808
CPU-NB: 1.328
nb frequency: 2868
NB volts: 1.2
RAM: 478 MHz (1:2) @ 5-5-5-15
Motherboard: GA-MA790X-UD3P
Cooling: OCN Marksman
OS: Windows XP
GFLOPS: didn't run
http://valid.canardpc.com/show_oc.php?id=2471716

Cpu: FX-8150
Name: topdog
Stepping: B2
Frequency: 7332.85
ref*multi: 232.79*31.5
CPU voltage: 1.908
CPU-NB: 1.44
nb frequency: 2800
NB volts: 1.31
RAM: 776 MHz (3:10) @ 7-7-7-20
Motherboard: Crosshair V Formula
Cooling: OCN Marksman
OS: Windows XP
GFLOPS: didn't run
http://valid.canardpc.com/show_oc.php?id=2470555

Cpu: Sempron 145
Name: topdog
Stepping: C3
Frequency: 6243.83
ref*multi: 445.99*14
CPU voltage: 1.872
CPU-NB: 1.38
nb frequency: 3121.9
NB volts: 1.26
RAM: 446 MHz (1:1) @ 5-5-5-15
Motherboard: GA-MA790X-UD3P
Cooling: OCN Marksman
OS: Windows XP
GFLOPS: didn't run
http://valid.canardpc.com/show_oc.php?id=2544569

 

[HobieCat]

Cpu: 955 BE
Name: HobieCat
Stepping: C3
Frequency: 6930
ref*multi: 252.02*27.5
CPU voltage: 1.86
CPU-NB: 1.75
nb frequency: 4032
NB volts: 1.25
RAM: 840.1 MHz (3:10) @ 8-8-8-24
Motherboard: Biostar 890FXE
Cooling: Kingpin F1 Dark
OS: Windows XP
GFLOPS: Roughly 9000

http://valid.canardpc.com/show_oc.php?id=2424719

 

[Ikmalhidayat]

Cpu: 960T

Cpu: Sempron 145
Name: topdog
Stepping: C3
Frequency: 6243.83
ref*multi: 445.99*14
CPU voltage: 1.872
CPU-NB: 1.38
nb frequency: 3121.9
NB volts: 1.26
RAM: 446 MHz (1:1) @ 5-5-5-15
Motherboard: GA-MA790X-UD3P
Cooling: OCN Marksman
OS: Windows XP
GFLOPS: didn't run
http://valid.canardpc.com/show_oc.php?id=2544569

http://img.hwbot.org/u11387/image_id_852628.jpeg

How do you get so high oc setting???!!! this is breaking the record for Sempron cpu family. 6.24Ghz???!! mine couldnt pass 3.5Ghz even with 1.525V. although my mobo says it can reach up to 4.12GHz oc with only stock heatsink (ASRock N68-GS FX). how do you get that high???

 

[nna2]

How do you get so high oc setting???!!! this is breaking the record for Sempron cpu family. 6.24Ghz???!! mine couldnt pass 3.5Ghz even with 1.525V. although my mobo says it can reach up to 4.12GHz oc with only stock heatsink (ASRock N68-GS FX). how do you get that high???

we're you running LN2? lol

 

[king smp]

nice I couldnt get my 965 stable over 4.0ghz so that is darn good for a 955

 

[mlcaouette]

Hoping to get up to 4.3Ghz, but I don't expect it. I do still have voltage and temperature headroom though.

Only problem I'm having is the N/B won't overclock to previously stable 2400Mhz when the cpu is above 4070Mhz. It will either have an error on prime and stop a core or it will blue screen.

 

[king smp]

what is your NB voltage set at?

 

[mlcaouette]

Something I never checked I always just left it on auto. In my last stable OC post, I was accidentally posting up the cpu-n/b volts in place of the nb voltage. At stock they are set to 1.000v. Although the board varies it slightly sometimes when it is set to auto (even when the northbridge is set to stock at 2000Mhz).

What are safe voltage levels for the cpu-n/b and the n/b? Plus which should I change to fix that stability problem?

 

[truegenius]

for cpu overclocking, change cpu-nb voltage and max upto 1.3v

increaseing nb voltage will help in overclocking igpu but it will fry your chipset very quickly and doesnot comes handy in cpu/ram or other part's overclocking, so you should keep nb volts at default/auto

summery
nb volts at default
raise cpu-nb upto 1.3v
you will be able to push nb clock to 3ghz @1.3v

 

[king smp]

Something I never checked I always just left it on auto. In my last stable OC post, I was accidentally posting up the cpu-n/b volts in place of the nb voltage. At stock they are set to 1.000v. Although the board varies it slightly sometimes when it is set to auto (even when the northbridge is set to stock at 2000Mhz).

What are safe voltage levels for the cpu-n/b and the n/b? Plus which should I change to fix that stability problem?

on my Asus board it is called Chipset voltage with should be the same as N/B voltage
I believe that going up to 1.25v is safe from my reading
I set mine for 1.22 and run my NB at 2800mhz on my Asus M4A77TD 770 board with a 1100T at 4ghz
do realize that sacrificing a 100mhz or so to get a higher NB freq is worth it
the higher NB freq will make up in performance somewhat

 

[king smp]

this is a decent guide for OCing Phenom IIs
http://www.overclockers.com/forums/showthread.php?s=caf786b598447e63bde75a6e3f8c7fbc&t=596023

 

[mlcaouette]

Thanks for the responses! If I couldn't stabilize the northbridge I was gonna drop back down to 4.0Ghz on the cpu, just as King smp had mentioned.

I did a quick skim over the linked article, carefully reading the N/B part. I knew most of the other stuff. I appreciate the link.

Gonna tweak my cpu some more first though, still trying to get 4.3Ghz stable. I have a bit of voltage headroom and more than enough temperature headroom.

 

[king smp]

it is hard to get phenom IIs over 4.0 stable
my best was 4.1ghz on my 1100T BE but darn it I cant remember the settings I used LOL
plus I wont go over 1.55v on my CPU
I just got a new case (Antec 1100 - http://www.neweggbusiness.com/Product/Product.aspx?Item=N82E16811129178&Tpk=antec%201100)
plus a new motherboard (well new to me LOL)
http://www.asus.com/Motherboards/AMD_AM3/M4A88TV_EVOUSB3/

so I am getting a better VRM (4+1 > 8+1) with a better heatsink on it
I am going to add a small fan to the VRM heatsink
I think that is causing my limit
I have been able to get my 1100T up to 4.4ghz and boot fine into windows and also almost run Cinebench 11.5
I hit a thermal limit which I think is mostly my VRM

 

[mlcaouette]

Can't seem to get 4.3Ghz stable, managed to complete about 50 minutes worth of prime95 blend at 1.56v under load (1.53 idle). Temps steady at 44C. I don't want to go any higher on the voltage right now so I guess I'll just be happy with 4.2Ghz.

Initial test showed the nb instability fixed (cpu @ 4.2 w/1.50v and nb @2.8 w 1.28v) after manually adjusting the cpu-nb voltage. It used to give me an error almost instantly on prime95. I'll run full stability test tomorrow though.

 

[4Ryan6]

Can't seem to get 4.3Ghz stable, managed to complete about 50 minutes worth of prime95 blend at 1.56v under load (1.53 idle). Temps steady at 44C. I don't want to go any higher on the voltage right now so I guess I'll just be happy with 4.2Ghz.

Initial test showed the nb instability fixed (cpu @ 4.2 w/1.50v and nb @2.8 w 1.28v) after manually adjusting the cpu-nb voltage. It used to give me an error almost instantly on prime95. I'll run full stability test tomorrow though.

Your cooling will be what holds you back, the cooler you can keep the CPU the further you'll get.

What cooling are you presently using?

 

[mlcaouette]

XSPC raystorm cpu block, RS360 rad (with push pull fans), 750lph pump can't recall the name but it came with the kit. CPU is the only thing on the loop. I have plenty of temperature headroom right now about ten degrees C that's with the voltage running at 1.56vcore. Fans rarely even go to 100% and my curve is set so they get to 100% at 45C cpu temp.

I just don't want to kill the cpu with too much voltage, everywhere I've read puts 1.55v at the max. I'm unsure if that's solely to keep temps below the cpu max or if the cpu really cannot handle more than 1.55v. Any opinions on this would be greatly appreciated, cause as long as it is safe I will push the voltage up a bit more.

 

[lowjack989]

My 965 runs at 1.56v without a hiccup...In BIOS when setting the voltage at anything above 1.525v will give me an actual vcore of 1.536v idle and My motherboard has the dreaded vrise...anyhow at 100% load my vcore is a steady 1.56v with no problems I am gaming at 4.445 GHz ...So, IMHO it is safe...I do however suspect that it is taking some of the life span of the chip with. Although this current configuration using a XSPC RS240 kit has be going strong for 8 months and the chip itself is 2 years 8 months old OCed the entire time...I guess the moral of this rambling is, Results may vary...Safety is in the eye of the beholder and all hardware is not created equal...Man I need to learn how to write a sentence properly...

 

[lowjack989]

@topdog---> Wow..That is a lot of effort you are putting into OCing those chips. Do you have the dream job of testing computer components or is it just a hobby? Nice OC's indeed. How practical is it to run at an extended duration? It looks to be a very costly and inefficient way of implementing cooling.

 

[mlcaouette]

Ok so I finally got 4.3Ghz stable, took a lot of voltage though.


Cpu: 955
Name: mlcaouette
Stepping: C3
Frequency: 4314Mhz
ref*multi: 200.7*21.5
CPU voltage: 1.548v/1.572 under load with LLC
CPU-NB: 1.28v
nb frequency: 2809.5Mhz
NB volts: 1.093 (auto)
RAM: 12GB 1600Mhz DDR3 9-9-9-24-1T @ 1.50V
Motherboard: Asus Sabertooth 990FX
Cooling: Custom LCS
OS: 7 64-bit

Screenie:

Also I deleted some of my old posts just to get rid of the old results.

Probably gonna take it back down to 4.2Ghz since the voltage required to maintain that speed was 1.51v under load instead of 1.57v.

 

[king smp]

Nice job
I agree with taking it back down to 4.2ghz
100mhz is nothing you will notice except in running benches

 

[nna2]

http://valid.canardpc.com/2562096
Cpu: PhII x4 840
Name: nna2
Stepping: C3
Frequency: 4110Mhz
ref*multi: 274*15 (oh god, cpu-z is spiking to a 800000Mhz bus speed XD)
CPU voltage: 1.5625v LLC enabled
CPU-NB: auto
nb frequency: 2740
NB voltsauto)
RAM: 8Gb 1080 6.6.6.18 @1.65V
Motherboard: Asus M5A88-M
Cooling: hyper 212 evo
OS: win8 64-bit

LinX refuses to test properly, but i got 41.6 on a lower voltage (unstable)

 

[FunkyLeorox]

Good Idea, Im currently building a rig and will send results when I finish building and OC'ing.

P.S. I will get CM Hyper 212 EVO, so expect actual results, and I will send screenies.

 

[langley8]

http://valid.canardpc.com/2580227

http://imageshack.us/f/15/14018523.png/

sorry it couldn't be 2 hours i haave to go to work

Vcore 1.476
CPU/NB Frequency auto
NB voltage auto
RAM 2x4GB DDR3 9-9-9-24 2T
DRAM frequency 671 MHz at auto voltages
Air cooling coolermaster hyper 212+
Windows 7 64 bit