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Help with my first overclock!

post #1 of 8
Thread Starter 
Hey everyone. I want to try my first overclock, but I'm not really sure how to approach it/know what to do, or what clock speed I could SAFELY overclock to without any "danger". Can anyone maybe give me step-by-step help? Here are my specs:
CPU: AMD Phenom II X6 1090T @ 3.2ghz (stock clock)
CPU Cooler: NZXT Havik 120 (2 120mm cooling fans)
Motherboard: ASUS Crosshair IV Formula
Video/Graphics card: Palit GeForce GTX 560 Ti 2GB GDDR5
RAM: 12GB DDR3 1333
PSU: OCZ ModXStream Pro 600W
HDD: 1TB Western Digital Black Caviar 64mb cache
OS: Windows 7 Professional 64 Bit
Case: NZXT Phantom 410 mid tower

Thanks guys!
post #2 of 8
easiest way is to raise the multiplier.
200x[16]=3200

i'd say put your multi at 18 and boot.
run prime95 for 30-40 min, check for any error and watch your temp carefully(i use speedfan to check my temp)
raise multi by .5 and retest until its no more stable/temps too high

drop multi to last successful test and now run prime95 for a couple of hours(i do 8 hour test personally), if everything is fine after that you are good to go.

now if you want to go further there are a lot of tuto on the forum but when you start playing with voltage and fsb it's more complicated.

hope it helped
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post #3 of 8
OK, then. First: Ditch the 3rd ram stick, AMD cpus only support dual-channel, not tri.

Phenom II overclocking:

Limits:
Max safe CPU Voltage: 1.5v (keep it at or under 1.475 to be on the safe side)

Max safe NB Voltage: 1.5v (anything over 1.3 doesn't help)

Max CPU Temp: 63C (keep it under 55C if possible, it gets unstable after that)


What to expect:
Thuban (Ph II x6) can typicly OC to around 4.0-4.2Ghz. NB can typicly clock at 2.7-3.0Ghz.


What to do:
Bump up the multiplier in BIOS, when it gets unstable, add one notch of voltage at a time until stable again, repeat.

When you find the max CPU-multi, start bumping up the NB multi the same way.

If you want to find the max OC, you'll need to use the FSB. Keep in mind that RAM, NB, and HyperTransport are also tied into the FSB, so if you bump it, adjust the other multipliers accordingly.

Keep HyperTransport as close to stock as possible. If you don't touch the FSB, don't touch HT either.


My settings for general reference:
CPU Freq: 225
Multi: 18 (4050mhz)
NB Multi: 12 (2700mhz)
HT Multi: 9 (2025mhz)

CPU-VID volts: 1.475
CPU-NB volts: 1.275


Overclocking Software:
CPU: AMD OverDrive
GPU: MSI Afterburner
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post #4 of 8
Thread Starter 
What do you mean "NB"? And i don't have triple channel ram tongue.gif
post #5 of 8
Official guidelines from AMD, and many of us exceed these:

Full reference .pdf is in my signature.


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post #6 of 8
Quote:
Originally Posted by MercStealth View Post

What do you mean "NB"? And i don't have triple channel ram tongue.gif

Northbridge. While it is on chip, it is still the link between CPU and IMC. As a general rule, faster is better for the Ph II Northbridges. In some cases, it can even make a higher OC stable with the same voltage.
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post #7 of 8
Thubans really like the NB overclocked for some reason; it seems to provide more of a performance boost on them than it does on a Deneb.

On a 1090T, you have a decent shot at making it to 4 GHz, although you might need to boost the voltage to get there. I wouldn't go over 1.45 on a Thuban (a Deneb can take a little more), but that should be more than enough. I would shoot for 250 MHz on the CPU clock at a multiplier of x16, for 4000 MHz. Lower the reference clock on the HT Link from 2000 to 1600; because of the CPU frequency overclock of 25 percent, this will put you right back at 2000.
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post #8 of 8
Quote:
Originally Posted by jsc1973 View Post

Thubans really like the NB overclocked for some reason; it seems to provide more of a performance boost on them than it does on a Deneb.
On a 1090T, you have a decent shot at making it to 4 GHz, although you might need to boost the voltage to get there. I wouldn't go over 1.45 on a Thuban (a Deneb can take a little more), but that should be more than enough. I would shoot for 250 MHz on the CPU clock at a multiplier of x16, for 4000 MHz. Lower the reference clock on the HT Link from 2000 to 1600; because of the CPU frequency overclock of 25 percent, this will put you right back at 2000.

Don't forget to bump the NB from x10 to x11-12, which would put you at 2750-3000. biggrin.gif
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