Here's a TON of information collected and discovered over the course of testing 4 Phenom 9850BE's that is sure to help some of you with any AM2/AM2+ setup, as well as my current BIOS options for my overclock for the M3A32-MVP Deluxe and 9850BE.
DISCLAIMER: This tome of information is intended to be a guide, used as a template for YOUR overclocking adventure - in no way shall I be liable for any malfunction or damage as a result of using any of this information.
Everything in this post is from my own personal experience embellished with links and facts from other's personal experiences. It was complied from 42 pages of hand-written notes spanning 4 different stepping Phenom 9850BE processors, along with prior knowledge of AMD architecture...nothing here is hearsay, it's all real-world experience of what has proven to be an effective overclock for MY current setup.
IN NO WAY do I mean for this guide to be followed to the letter - ALL components, even given the same exact stepping/lot #, sequential serial #'s, etc., will overclock the same.
There is no guarantee. You paid for parts that will perform at their advertised specifications, and what you're doing by overclocking is getting *more* than what you paid for (hence the 'no guarantees' part.)
What may work for one individual may or may not work for the next...even given the same exact components...just always remember this...sometimes you have to settle for less than what you originally expected - the way to make it 'ok' in your head is to remember the 'no guarantees' thing...you've already got 'something' for 'nothing' if you've overclocked *at all*.
In overclocking, there are inherent risks. The very fact that you're playing with voltages and cycles translates into playing with fire - literally. More voltage = more heat. I can't stress enough the importance of proper temperature monitoring and some real good CPU cooling as well as excellent case cooling.
Here's AMD's 'secret' overclocking formula (not discovered by me, but rewritten by me to be understandable by the masses: This equation is for the Phenom/AM2/AM2+ architecture, it's a bit different from the older (pre-K8) architecture in that our HT and NB are now a multiple of the FSB, as well as the divisor ratio is no longer rounded up when landing on a fraction (decimal) of a whole integer.
AMD Overclocking Equation:
(CPU Multi) * (FSB) = (CPU Freq)
(CPU Multi) / (Memory Divider) = (Divisor Ratio)
(CPU Freq) / (Divisor Ratio) = (RAM MHz) (* 2 = DDR MHz)
(NB Multi) * (FSB) = (NB Freq)
(HT Multi) * (FSB) = (HT Freq) **
**note: the HT Multi is usually shown as a MHz option rather than a multiplier of the FSB, but in fact, it is a default of 10X the FSB
Also of note is that your HT *MUST* be < or = the resulting NB Frequency or you will not be stable.
Memory Dividers for use in the equation above
I have included every conceivable way that these dividers can be displayed for every AM2/AM2+ BIOS. Use the DECIMAL value in the equation above and use one of the corresponding values for your specific BIOS. I've only included the 800MHz and the 1066MHz values, as this is what the majority of us are using.
533 = 1066 = 16:6 = 8:3 = (8 / 3 = 2.6666666) = 2.6666666
400 = 800 = 12:6 = 6:3 = (6 / 3 = 2) = 2
There are footnotes collected from my adventures at the bottom describing some of the more obscure functions and some of the hidden options. Read them carefully, test each config for yourself and decide what works for you.
About MONITORING YOUR TEMPS:
ASUS has a nifty little utility called PCProbe2 that comes on the CD that came with the motherboard... USE IT. I also found that CoreTemp gives a very close reading with the M3A32-MVP Deluxe.
If your temps at *any* time reach into the mid 50*C range, STOP and readdress your CPU and case cooling before continuing any further. (High 60*C is the upper limit, but we dont need to push it, right?)
Just ensure that you're using *something* to monitor your temps while spending any time in the overclocking arena!
There are loads of good aftermarket CPU cooling options out there...I personally have the ThermalRight Ultra-120 Extreme, and I'm very pleased with not only it's performance, but it's sound level as well (with 2 Scythe S-Flex fans).
Also of importance is your case cooling. Every case I've ever had IS NOT pre-setup with what turns out to be the most efficient fan arrangement. It's up to YOU to decide what fan needs to be where, which direction it should be (pulling air IN or pushing it OUT) and what make/model/CFM/RPM you need. Just be aware that without fresh, cool air coming IN the case, all you've got is warmed air to circulate across your CPU's HS/f, and without adequate EXHAUST, you've really just shot yourself in the foot again - BOTH are paramount to a decent overclock (I really can't stress this enough - MOST people miss case cooling and concentrate solely on their CPU HS/f)
All in all, by the very nature of overclocking, you need to know that you're taking a risk of exposing specific components to more voltage/heat/cycles than they're designed to take, which *could* or *may not* lead to their early or eventual demise.
I'm sure most people that will read through all that crap already understand the risks...it's just pertinent for me to say...I can't be held liable for any kind of overclock gone wrong.
DISCLAIMER: This tome of information is intended to be a guide, used as a template for YOUR overclocking adventure - in no way shall I be liable for any malfunction or damage as a result of using any of this information.
Everything in this post is from my own personal experience embellished with links and facts from other's personal experiences. It was complied from 42 pages of hand-written notes spanning 4 different stepping Phenom 9850BE processors, along with prior knowledge of AMD architecture...nothing here is hearsay, it's all real-world experience of what has proven to be an effective overclock for MY current setup.
IN NO WAY do I mean for this guide to be followed to the letter - ALL components, even given the same exact stepping/lot #, sequential serial #'s, etc., will overclock the same.
There is no guarantee. You paid for parts that will perform at their advertised specifications, and what you're doing by overclocking is getting *more* than what you paid for (hence the 'no guarantees' part.)
What may work for one individual may or may not work for the next...even given the same exact components...just always remember this...sometimes you have to settle for less than what you originally expected - the way to make it 'ok' in your head is to remember the 'no guarantees' thing...you've already got 'something' for 'nothing' if you've overclocked *at all*.
In overclocking, there are inherent risks. The very fact that you're playing with voltages and cycles translates into playing with fire - literally. More voltage = more heat. I can't stress enough the importance of proper temperature monitoring and some real good CPU cooling as well as excellent case cooling.
Here's AMD's 'secret' overclocking formula (not discovered by me, but rewritten by me to be understandable by the masses: This equation is for the Phenom/AM2/AM2+ architecture, it's a bit different from the older (pre-K8) architecture in that our HT and NB are now a multiple of the FSB, as well as the divisor ratio is no longer rounded up when landing on a fraction (decimal) of a whole integer.
AMD Overclocking Equation:
(CPU Multi) * (FSB) = (CPU Freq)
(CPU Multi) / (Memory Divider) = (Divisor Ratio)
(CPU Freq) / (Divisor Ratio) = (RAM MHz) (* 2 = DDR MHz)
(NB Multi) * (FSB) = (NB Freq)
(HT Multi) * (FSB) = (HT Freq) **
**note: the HT Multi is usually shown as a MHz option rather than a multiplier of the FSB, but in fact, it is a default of 10X the FSB
Also of note is that your HT *MUST* be < or = the resulting NB Frequency or you will not be stable.
Memory Dividers for use in the equation above
I have included every conceivable way that these dividers can be displayed for every AM2/AM2+ BIOS. Use the DECIMAL value in the equation above and use one of the corresponding values for your specific BIOS. I've only included the 800MHz and the 1066MHz values, as this is what the majority of us are using.
533 = 1066 = 16:6 = 8:3 = (8 / 3 = 2.6666666) = 2.6666666
400 = 800 = 12:6 = 6:3 = (6 / 3 = 2) = 2
There are footnotes collected from my adventures at the bottom describing some of the more obscure functions and some of the hidden options. Read them carefully, test each config for yourself and decide what works for you.
About MONITORING YOUR TEMPS:
ASUS has a nifty little utility called PCProbe2 that comes on the CD that came with the motherboard... USE IT. I also found that CoreTemp gives a very close reading with the M3A32-MVP Deluxe.
If your temps at *any* time reach into the mid 50*C range, STOP and readdress your CPU and case cooling before continuing any further. (High 60*C is the upper limit, but we dont need to push it, right?)
Just ensure that you're using *something* to monitor your temps while spending any time in the overclocking arena!
There are loads of good aftermarket CPU cooling options out there...I personally have the ThermalRight Ultra-120 Extreme, and I'm very pleased with not only it's performance, but it's sound level as well (with 2 Scythe S-Flex fans).
Also of importance is your case cooling. Every case I've ever had IS NOT pre-setup with what turns out to be the most efficient fan arrangement. It's up to YOU to decide what fan needs to be where, which direction it should be (pulling air IN or pushing it OUT) and what make/model/CFM/RPM you need. Just be aware that without fresh, cool air coming IN the case, all you've got is warmed air to circulate across your CPU's HS/f, and without adequate EXHAUST, you've really just shot yourself in the foot again - BOTH are paramount to a decent overclock (I really can't stress this enough - MOST people miss case cooling and concentrate solely on their CPU HS/f)
All in all, by the very nature of overclocking, you need to know that you're taking a risk of exposing specific components to more voltage/heat/cycles than they're designed to take, which *could* or *may not* lead to their early or eventual demise.
I'm sure most people that will read through all that crap already understand the risks...it's just pertinent for me to say...I can't be held liable for any kind of overclock gone wrong.