High memory voltage on Phenom...

[RGone]

It is now being voiced about that Vmem beyond 2.2 volts when using phenom processor can possibly damage the internal memory controller and what that may lead to is yet unknown.

[karbonkid]

how does the Vmem have anything to do with the memory controller? more info please?

[RGone]

Memory controller is in cpu and all you have to do is harken back to the days when high memory voltage on athlon 64 cpu could damage the internal memory controller and it seems similar is afoot now and that voltage appears to be 2.2 on the memory with phenom processor with internal memory controller.

[karbonkid]

Memory controller is on the CPU. Vmem is regulated by the motherboard. Memory controller voltage is a function of Vcore, not Vmem. I'm not saying you're wrong, I just want to see evidence...

[msimax]

RGone i thought this was problem when running bh5 @3.3v or more, you had to run your cpu @1.4v to be safe

[muzz]

It's been said that RGone is correct.

I'd love for that to be incorrect though.

RGone, when are we gonna see alot of DFI/790 boards available?
Availability is abysmal

[msimax]

Memory controller is on the CPU. Vmem is regulated by the motherboard. Memory controller voltage is a function of Vcore, not Vmem. I'm not saying you're wrong, I just want to see evidence...

http://www.xtremesystems.org/forums/...ad.php?t=79509

[tictac]

split power plane on RD790 board...

[karbonkid]

http://www.xtremesystems.org/forums/...ad.php?t=79509

I stand corrected.

[dinos22]

Memory controller is on the CPU. Vmem is regulated by the motherboard. Memory controller voltage is a function of Vcore, not Vmem. I'm not saying you're wrong, I just want to see evidence...

i guess you haven't been around K8 days when people were popping memory controllers with low vcore and high vdimm

it didn't necessarity need to be 3v on vmem either

[darkorb]

what happened back in K8 days? im still here!

runing 1.45 on vcore, 2.9v on mem, 4 sticks of 512

[dinos22]

maybe Tony's theory is rubbish if you haven't killed the chip yet lol

[Lastviking]

what happened back in K8 days? im still here!

runing 1.45 on vcore, 2.9v on mem, 4 sticks of 512

Dont wory i runing 3.5-3.6v 24/7 on the my 4x512mb and have also runed like 4.1v in bench.

[KTE]

I've ran 2.2V very consistent so far (what my RAM is rated for) and 2.3V on the odd occassion. No problems since 12th Nov.

[dinos22]

Dont wory i runing 3.5-3.6v 24/7 on the my 4x512mb and have also runed like 4.1v in bench.

lol i believe you as i've seen your W.R. runs
looks like Tony's theory is slowly drowning eheheh

[informal]

It's not Tony's fault.He just passed some informations he thought were eleveant to future Phenom owners.BTW,every K8 &10 CPU has-built in over-voltage protection which in turn can fail..We need more examples of failures in these circuits(and as effect burned/dead Phenoms).

[Tony]

guys

If you want to kill the memory controller on your Phenom run 2.3V...its as simple as that.

Remember im not quoting the one or two it may or may not happen too...im quoting from advice i have heard from many people now who are telling me its VERY dangerous.

Im not bothered personally if you kill your CPU or your ram if something happens in the CPU that causes the memory to die...in the end its your CPU to kill and i respect that.

I already know this theory has been tested and the CPU did die...2.4V was the vmem.

So...its upto you

[LIKMARK]

Some people need to learn those things the hard way

[dinos22]

Tony maybe there is more to it than just high vdimm and low vcore
if not why are these systems still alive after all this time then??

[duploxxx]

guys

If you want to kill the memory controller on your Phenom run 2.3V...its as simple as that.

Remember im not quoting the one or two it may or may not happen too...im quoting from advice i have heard from many people now who are telling me its VERY dangerous.

Im not bothered personally if you kill your CPU or your ram if something happens in the CPU that causes the memory to die...in the end its your CPU to kill and i respect that.

I already know this theory has been tested and the CPU did die...2.4V was the vmem.

So...its upto you

ouch there goes my team cas3 performance @ high speed

Tony, how is it then on am2 cpu's never had an issue on my am2 3600-5200 ones... was it just luck or is it also the combination with 790 boards or just phenom memory controller

[karbonkid]

i guess you haven't been around K8 days when people were popping memory controllers with low vcore and high vdimm

it didn't necessarity need to be 3v on vmem either

Ironically enough, I myself lost a CPU (thankfully it was only a Sempron) to this - i've only just realised. I didn't know at the time because the only forums I used to follow were DFI-street...

[Hornet331]

mabye amds 65nm fab process is the one to blame?

when they still have problems with the process, i think it would be possible to see cpus/imc that are very voltage resistant and others that die just when you increase the voltage a bit above the recommended settings.

[Tony]

What is the title of this thread...does it say high vmem kills Brisbane?

K10 is a whole new architecture...remember that part.

There is 1 huge plus point here. K10 controlls memory a lot better than K8, as bios matures you will see.

Also clocks needing 2.4v on K8 don't need 2.4V on k10, in some cases huge drops in vmem will still work.

[Brother Esau]

Sheesh.............this just keeps getting better and better

[Lightman]

I'm happy with that...

What Tony says is absolutely true! Mem controller in K10 is way better compared to K8. My Ballistix is working flawlessly with 2.25V @1000MHz 4-4-4 timings. On K8 it needed 2.42V and it wasn't completely stable ...

If increasing NB voltage will mitigate risk of breaking CPU with over 2.2VDIMM then it's OK and most affected are AM2+ board owners (due to 1.1V NB power plane).