AMD Overclocking Club

[king smp]

My corsair vengeance 12GB 3x4gb just arrived and I've just fitted it aswell i think its running at 1600 dual channel and the other on 964 or something cant remember. When I did the printscreen I had 4x2GB crucial 1066mhz dd3 rams which I now replaced with the vengeance.

I got the 12GB because i got it a lot cheaper than the 8GB but I'd probably take out one of the stick so I can run on dual channel only what do you guys think?

would you mind explaining what NB, I still have a lot to learn xD I've manage to get my pc now into 3.6ghz with 1.375v so thats a lot better than 1.45v havnt tried prime 95 but manage to play bf3 on ultra without a problem since I have a crossfire x 6850's

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quote
"When you overclock your CPU, the higher you go the more likely you will need to stabilize the CPU-NB. What do I mean by this? As the CPU increases its speed to calculate data, so must the speed of which the CPU communicates with other components on the Motherboard: chipset, memory, etc. Let me take the classic example of a 4.0 GHz 940BE and its CPU-NB. If you were to leave the CPU-NB at 1.8 GHz stock then the data calculated by the CPU would create a bottleneck and thus resulting in errata errors or CPU errors. So in order to balance these speeds a CPU-NB clock of 3.0 GHz would be needed. In most cases of high OC’s that result in crashes; the CPU-NB is usually the culprit."

source - http://www.overclockers.com/forums [...] 23&page=10


"The northbridge has historically been one of the two chips in the core logic chipset on a PC motherboard, the other being the southbridge. Increasingly these functions have migrated to the CPU chip itself, beginning with memory and graphics controllers. For Intel Sandy Bridge and AMD Fusion processors introduced in 2011, all of the functions of the northbridge reside on the CPU.[1] When a separate northbridge is employed in older Intel systems, it is named memory controller hub (MCH) or integrated memory controller hub (IMCH) if equipped with an integrated VGA."

source - http://en.wikipedia.org/wiki/Northbridge_(computing)

basically the NB is a bus that allows communication from the CPU to other parts of the motherboard like memory,PCIe etc

AMD CPUs like a higher NB speed when OCing
generally can reach between 2600-3000mhz
also will need to increase the CPU-NB up to 1.2/1.3v

 

[yologelo]

\
quote
"When you overclock your CPU, the higher you go the more likely you will need to stabilize the CPU-NB. What do I mean by this? As the CPU increases its speed to calculate data, so must the speed of which the CPU communicates with other components on the Motherboard: chipset, memory, etc. Let me take the classic example of a 4.0 GHz 940BE and its CPU-NB. If you were to leave the CPU-NB at 1.8 GHz stock then the data calculated by the CPU would create a bottleneck and thus resulting in errata errors or CPU errors. So in order to balance these speeds a CPU-NB clock of 3.0 GHz would be needed. In most cases of high OC’s that result in crashes; the CPU-NB is usually the culprit."

source - http://www.overclockers.com/forums [...] 23&page=10


"The northbridge has historically been one of the two chips in the core logic chipset on a PC motherboard, the other being the southbridge. Increasingly these functions have migrated to the CPU chip itself, beginning with memory and graphics controllers. For Intel Sandy Bridge and AMD Fusion processors introduced in 2011, all of the functions of the northbridge reside on the CPU.[1] When a separate northbridge is employed in older Intel systems, it is named memory controller hub (MCH) or integrated memory controller hub (IMCH) if equipped with an integrated VGA."

source - http://en.wikipedia.org/wiki/Northbridge_(computing)

basically the NB is a bus that allows communication from the CPU to other parts of the motherboard like memory,PCIe etc

AMD CPUs like a higher NB speed when OCing
generally can reach between 2600-3000mhz
also will need to increase the CPU-NB up to 1.2/1.3v

Thanks for that so what should I change the CPU-NB clock to? currently running 3.6 ghz @1.375v is the voltage too high or too low? if in the middle do you think i can lower the voltage even more? sorry about all these questions very new to overclocking

 

[Motopsychojdn]

Run through the black edition overclocking guide up top for some good tips on Nb tweaking
Moto

 

[GenesisOC]

Cpu: Fx-8150
Name: GenesisOC
Stepping:2
Frequency: 4200
ref*multi: 200*21.0
CPU voltage:1.28v
CPU-NB:1.2125
nb frequency:2200
NB volts: 1.25v
RAM: G.skill Sniper series DDR3 1866mhz oc'd to 2133mhz 9-12-10-28-2T 1.66v
Motherboard: Asrock 990fx Fata1ty Professional
Cooling: Custom WC loop
OS: Win7 64-bit

New to fourms. Finally got around to playing around with this Bulldozer. I have had this chip Oc'd to 4.8Ghz just long enough for a cpuz screenshot. This will have to do though. My Fx-6300 comes tomorrow.

unstable 4.8 cpuz http://valid.canardpc.com/show_oc.php?id=2653957

stable 4.2 http://valid.canardpc.com/2654436

Im working on the prime95 as I posted this.

 

[Motopsychojdn]

More Cpu voltage for the 8150 there should hold that 4.8GHz for you,
depending on your loop you should be ok for temps
Moto

 

[IMTIAZ_BABA]

HI SAINT ITS ME IMTIAZ I WANT TO ASK U DAT I WANT TO OVERCLOCK MY RIG IS
PHENOM 2 1055T HEXACORE PROCESSOR
GIGABYTE 880GMA USB 3
RAM 8 GB {1333MHZ}
COOLER MASTER HYPER 212 EVO {CPU COOLER}{PUSH-PULL CONFIGURATION}
GTX 460 1 GB GRAPHICS CARD FROM ZOTAC
ZEBRONICS PLATINUM SERIES 600 WATT POWER SUPPLY
SEAGATE BARRACUDA 500 GB HARD DRIVE {PRIMARY}
WESTERN DIGITAL 1 TB CAVIAR GREEN
COOLER MASTER ELITE 310 CABINET WITH COOLER MASTER 120 MM CABINET FAN X1,CM 80 MM CABINET FAN X1
SO PLESE TELL ME WHAT CLOCK SPEED WILL BE STABLE {AND HIGHEST}IF I OVERCLOCK AND PLEASE TELL ME
THOROUGHLY WHAT I HAVE TO DO COZ I M A NOOB IN OVERCLOCKING

CPU: AMD PHENOM 2 1055T HEXACORE PROCESSOR
Name: THUBAN
Frequency: 2800 GHZ NOW {BUT I WANT STABLE AND HIGHER CLOCK SPEED}
ref*multi: x14 {HIGHEST}
CPU voltage: 1.35v
NB frequency: ?
NB volts:?
HT frequency: ?
HT volts:?
RAM: 8GB DDR3 {1333 MHZ}
Motherboard: GIGABYTE 880 GMA USB-3
Cooling: COOLER MASTER HYPER 212 EVO {CPU COOLER}{PUSH-PULL CONFIGURATION}
OS:Win 7 64-BIT

 

[Motopsychojdn]

Step one, sort your capslock key problem out 😛
Step two, read this to get started,
http://www.tomshardware.co.uk/forum/274820-11-black-edition-overclock-raising-multiplier-guide
Saint started this thread but I don't think he even reads it anymore due to being all Intel now, I may be wrong but don't depend on a reply from him
Moto

 

[Prehistoricman]

Wait.. so for modern CPUs, the NB is actually inside the CPU?

This throws my entire perception of reality into question...

 

[xX_ZEAL123_Xx]

Have a fx8150 just wondering what u guys got it to push brand new to ocing

 

[king smp]

Step one, sort your capslock key problem out 😛
Step two, read this to get started,
http://www.tomshardware.co.uk/forum/274820-11-black-edition-overclock-raising-multiplier-guide
Saint started this thread but I don't think he even reads it anymore due to being all Intel now, I may be wrong but don't depend on a reply from him
Moto

did you see the Swiftech H220 that just came out?

http://www.tomshardware.com/news/Liquid-Water-CPU-Cooling-cooler,20589.html

that might be my birthday gift to myself this year (May)
along with a new case to fit it

 

[kiezz]

Hi all,

CPU: Phenom II x6 1090T
Name:Kiezz
Frequency:3.9ghz
Ref-Multi:300x13
Cpu Voltage:1.48v
NB frequency:2700mhz
NB volts:1.36
Ram:8GB DDR3 1333mhz@1600mhz@1.65v
Mobo: Asus M4A89GTD Pro
Cooling: be quiet dark rock pro
O.S:Windows 7 64bit

[/URL][/img]

 

[kiezz]

sorry I should have resized the image

 

[king smp]

nice OC but your NB volts look pretty high
is that VDDNB voltage?

 

[kiezz]

Thanks well in my bios its labelled cpu/nb i have a nb voltage too which i have on auto its 1.28v,
I find it hard to find a good setting for 4ghz the best I've had is semi stable i could benchmark it but not use prime95 but after reading your post with the analogy its got me thinking to maybe try running my NB up to 2900-3000ghz ish and see if it can keep stable, I'll post if i get it stable

 

[king smp]

drop down your HT link speed
your HT shouldnt be so high
no need to go much over 2000mhz
2200 or 2400 is okay but really no benefit to raising the HT
it is showing at 2700mhz on your screenshot and that high will give instabilty

the cpu/nb is the one you want and be careful with that voltage
dont go over 1.4v
really shouldnt need to go much over 1.30 really

 

[kiezz]

Thanks for the tips I had read somewhere about keeping the HT and NB to the same speeds but I'll give your tips a shot and let you know how I get on thanks

 

[Motopsychojdn]

did you see the Swiftech H220 that just came out?

http://www.tomshardware.com/news/Liquid-Water-CPU-Cooling-cooler,20589.html

that might be my birthday gift to myself this year (May)
along with a new case to fit it

Theres several threads on it already mate, one of which got locked due to some attitude from the Op (not accepting W/c wisdom from myself Rubix and others)
Its a step up from 'normal' allinones, not quite the Xspc level but its in the right direction and it'll be interesting to see how that develops, look at how the Corsair H series has evolved
If you do get one, make your log/thread/review and Pm Rubix for inclusion in the W/c sticky
Moto

 

[king smp]

I was looking at some of the XSPC complete kits for around $250 on FrozenCPU
what do you think of those Moto?

 

[king smp]

Thanks for the tips I had read somewhere about keeping the HT and NB to the same speeds but I'll give your tips a shot and let you know how I get on thanks

usually want your HT between 2000-2400 and your NB between 2800-3000mhz
increasing HT speed doesnt benefit performance while NB does

 

[Motopsychojdn]

I was looking at some of the XSPC complete kits for around $250 on FrozenCPU
what do you think of those Moto?

My own loop started with a RX240 kit back in the day so I'm all for their kits, especially now you can upgrade the pumps etc, check out the W/c sticky, theres a kit section in there and your own thread should grab a lot of posts from myself, Rubix, Muffin, Lutfij etc
Moto

 

[kiezz]

usually want your HT between 2000-2400 and your NB between 2800-3000mhz
increasing HT speed doesnt benefit performance while NB does

I've got a 4ghz set up with 250x16 and knocked down the HT to 2100mhz and the NB at 2750mhz as the next jump up was to 3100mhz, I didn't change any voltages but had to bring the ram back to 1333mhz.
the problem I have with bringing down my bus speed is when it comes to benchmarking n cinebench although I score higher points on the cpu it ends up with lower fps in the openGL test,
so im torn between a faster cpu or more fps I know its not much just 1 fps in it

[/URL][/img]

I haven't done a decent stability test on this yet as I'll try push it to 4.1ghz

 

[king smp]

I wouldnt worry about the OpenGL test in CB 11.5
I have seen more powerful cards lose to less powerful cards in that test
remember most of your games are DirectX and as such the drivers for the video cards are geared more to DX 11

 

[mlcaouette]

At Kiezz, it seems like you are adding extra image tags with each picture, it's not a big deal just more of an annoyance.

 

[ap0ll013]

Hi All! Here are my results from my first ever stable OC. A special thanks to everyone who helped me to get here in my other thread. I hope you guys can give me some feedback on what I can change/adjust to get even higher. I had wanted to get to 4.0GHz, but was having a hard time, so I decided to follow through with 3.9GHz to get it finalized so I had that experience as well. Anyways, I had a great time doing this and hope for more and faster in the near future!

Cpu: 965BE
Name: ap0ll013
Stepping: C3
Frequency: 3900
ref*multi: 200*19.5
CPU voltage: 1.45000
CPU-NB: 1.25000
NB frequency: 2600
NB volts: 1.2
RAM: 4GB 1600Mhz DDR3 8-8-8-24-2T @ 1.65V
Motherboard: ASUS Crosshair Formula IV
Cooling: Corsair H100i
OS: 7 64-bit

LOAD

COMPLETE

 

[king smp]

I had a 965
your temps are great and you have alot more CPU voltage headroom
a phenom II is relatively safe going up to 1.55v
i had my 965 at 4ghz at 1.53v though you might be able to be a little lower from looking at your OC
just watch temps
can go up to 61c but try to keep it at 55c if you can