Anybody used AM3 CPU on AM2 board successfully ?

many of the AM3 cpus might require 130 watts, which might be more than many AM2 boards can handle....

Get the right board, check MB manufacturer's website for supported/approved cpus...

The cpu fitting into the socket is not all that's involved....; also the issues of DDR2/3 and integrated memory controllers if memory serves....

You can run an AM2 in AM3, but not vice versa....

If you strongly disagree, it is your money....

a few articles do suggest some AM2+ boards will support AM3 cpus..

I stand corrected.

125W.

He has a board. And he mentioned what it is. Then someone linked him to the site you mention. And it supports all AM3 CPUs up to 125W.

Not this. But vice versa. Perhaps you are confusing it with the upcoming AM3+ where you can use AM3 in am3+ but not vice versa?

Issues? What do you mean "issues"?

AMD uses something called an IMC (Integrated Memory Controller).
It helps the AMD chips perform very well in memory related tasks (because now the ram isn't controlled by the motherboard through the FSB)
but it also has a few quirks.
The IMC doesn't seem to like a lot of stress, and so in general, you wont get as much of an OC out of your ram if you have all of your ram slots populated.
So it should be easier to get more performance out of only two sticks of ram.

*Intels Nahelem architecture utilizes this same design, leaving the Core 2 series as the only mainstream processor to still use the FSB design.

Also, the same thing goes for mismatched ram, the IMC just doesn't like it.
So if you have ram that is not from the same kit, and are experiencing instability, try taking out the non-matching set, and see if that helps out
if ever a problem.

you don't get it man.
AM3 chips will not run on AM2 board, now there are cases of BIOS updates that make changes to allow AM3 chips
but I am yet to have verified that for myself; I'll give you that.
AM2+ boards can run AM3 chips with DDR2 RAM, 1066MHz to be exact.
some AM2 boards can run first generation Phenom chips (Phenom x3 and x4) and they do not necessarily have to be AM2+ boards.
the resaon for that is the amount of VRAM that the particular motherboard has, 8mb of VRAM is the minimal amount for the first class Phenom chips
and stronger AM2 boards have this amount while weaker AM2 boards only have 4mb of VRAM and that's a hindrance.

the athlon x2 KUMA class is the first class to have the 64 dropped from it's name and has slightly different architecture that the Brisbane and Windsor
athlon 64x2 but BIOS will allow those to run on AM2 boards.
do not get the athlon x2 KUMA confused with the athlon ii x2 REGOR class.

http://en.wikipedia.org/wiki/Socket_AM3
Compatibility

Socket AM3 breaks compatibility with AM2/AM2+ processors due to a subtle change in key placement. The AM3 socket has 941 pin contacts[1] while current AM3 processors have only 938 pins. Tom's Hardware removed the two obstructing key pins from an AM2+ Phenom processor in order to fit it into an AM3 socket. The processor did not work in the AM3 socket, but still worked in an AM2+ socket, suggesting that compatibility issues run deeper than merely the key pins.[3] It is likely due to the fact that the built-in memory controller in AM2/AM2+ processors only supports DDR2 (unlike AM3 processors, which supports both DDR2 & DDR3 memory).[4]

As AM3 processors also support DDR2, they are backwards-compatible with Socket AM2/AM2+, contingent upon a BIOS update for the motherboard. Manufacturers including Asus,[5] Gigabyte,[6] and others have labeled existing AM2/AM2+ boards as being "AM3 Ready" or similar, indicating that BIOS support is provided for the specified boards. This allows existing AM2/AM2+ systems to upgrade the CPU without having to upgrade any other components.

I'm So sorry for you MAN. because of these links!!
You better have look around this forum!!
http://vip.asus.com/forum/view.asp [...] uage=en-us

And better check the cpu list from the MY board's page as i linked down!

http://ae.asus.com/product.aspx?P_ [...] templete=2

THAT'S AN AM2+ BOARD..!

so basically it can work but you have been saying AM2 this entire time.
Not AM2+..
(facepalm to you sir)

This was a AM2 board !!. I can picture my board's box if you don't believe me!!
This is the point . every am2 borad is an am2+ board now!! On that time there wasn't am2+ and now companies see that is no problem maker difference between am2 and am2+ !!
NOW it's calling " [ am2/am2+ ]"

every am2 cpu can work on am2+ and every am2+ cpu can work on am2 socket.
but it's not about am3 I know. but they made some bios upgrade that helps to work an am3 Cpu on am2/am2+ board.
but obviously an am2/am2+ CPU can't work on an am3 board because this cpu doesn't support ddr3 ram and the only memories that are supported by am3 borads is ddr3!

He's not saying that he's saying an AM3 will work in his AM2 board.

even my boad's box says I can only use 800 mhz and I used to watch that note in Asus website.and now!! what happend? Today I am able to use 1066 rams. oh god thanks a lot. you just saved my a**. they were not taking about it untill ddr2 rams is almost out dated! and this is their trick !!

I though I covered it pretty well in the 1st post of this thread....aaaaaaaaaaah well.

So what is your HT link Speed? and what happened to these new! core's L2 cash? are they unlocked too?

You asked about running an AM3 cpu on your board I said you could.

You asked about other peoples experience of doing so I told you about my setup.

Then the *** just went crazy, I don't understand what the issue is now, every time I search for your board it comes up as an AM2 board, the bios update says it supports PII's, why can't you run the memory at 800mhz and tighten the timings up, I run mine at 800mhz with tighter timing options and get better benches than running it 1066mhz.

I know!!
1066 was not on the page!! this added recently . and am2/am2+ too.
there is no fearing of confusing! I can eat one of those pills on your hand. but wich?

UUUUUUUUUUGH WATCHA GONNA DO??

I love you too!!

Why don't you try it yourself, your problems may be different to others anyway, then maybe you could help others.
The Asus site has details of how to get the cpu to work, follow them and stop worrying about what might happen.

my newest work horse.......... Gigabyte MA785GM-US2H-- AMD 1090T-- 4 1gig DDR2 800, Corsair XMS.......... so does that answer your original question ?

prove it:
http://www.cpu-upgrade.com/mb-Giga [...] .0%29.html
AMD Phenom II X6
HDT35TWFK6DGR 1035T 2600 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 95 Watt, 4000 MHz HT 1.0 Not supported
1045T 2700 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 95 Watt, 4000 MHz HT 1.0 Not supported
HDT55TFBGRBOX

HDT55TFBK6DGR 1055T 2800 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 125 Watt, 4000 MHz HT 1.0 Not supported
HDT55TWFGRBOX

HDT55TWFK6DGR 1055T 2800 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 95 Watt, 4000 MHz HT 1.0 Not supported
1075T 3000 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 125 Watt, 4000 MHz HT 1.0 Not supported
HDT90ZFBGRBOX

HDT90ZFBK6DGR 1090T 3200 MHz, 512 KB, L3 6MB, Thuban, 0.045 micron, Stepping E0, 125 Watt, 4000 MHz HT 1.0 Not supported

Prove it? Your own link proves it..... But anyway...

http://valid.canardpc.com/show_oc.php?id=1578920

Woah. This thread has me lost now lol.

Grishnukh, would you mind posting a list of any outstanding problems or questions you still have?

the thought that his board was AM2 and it's AM2+ becuase he saw 1066MHz RAM and was thinking DDR3
unaware of DDR2 1066MHz.
so then the debate started about AM2 boards not AM2+ boards running AM3 chips.
bottom line from the way it now seems that any AM2 with enough VRAM is capable with a BIOS update
to run AM3 chips..
(malmental still skeptical however)

who.?
I can blame it on the ganja this time if talking to me...
cuz' I'm toking as I type..

poltergeist - come to the light

I appeared to shed some light and 'smoked out' clarity......
have to admit tho, it got interesting and informative when mal comes thru..!