llano default voltages ?

[Soulkeeper]

Can anyone tell me where to find information on the default nb/gfx voltage for the A series ?

I can't seem to locate voltage information on AMD's website

EDIT: I just emailed amd requesting information after spending nearly 2hrs searching for it.

"I cannot seem to locate information on the default/intended voltages for the A series APUs.

Specifically, I'd like to know what voltages are intended for the northbride and gpu portion of the APUs. Also, are the northbridge and gpu on the same power plane ?

Any technical docs or html links on voltages would be helpful.

thank you,
"

 

[Soulkeeper]

I'm not even really sure what the default clock speed is supposed to be for the north bridge
my bios won't tell me, and I can't locate specifications on this stuff.

Guessing on settings is kind of lame.

 

[Soulkeeper]

"The Core voltage for the A8-3850 is 0.45 to 1.4125V. If you need to know the voltage for the Northbridge chipset, you will need to consult with the motherboard manufacturer.

In order to update this service request, please respond, leaving the service request reference intact.

Best regards,

AMD Global Customer Care"


Apparently AMD support has no idea what they are selling ...
So if I called it "uncore" would they then realize I didn't mean motherboard ?
Do they expect customers to just randomly pick a voltage for all APU power planes in that range ?
and of course no links to any charts/docs/etc. no internet information on suggested voltage settings !?!
just ranges for all power planes ?
Is it up to bios implementers to validate their APUs at "default" voltages now ?

 

[Arkadrel]

@Soulkeeper

I think thats because of powerstates, like a phenom II, it ll jump up and down in mhz/volt depending on how much stress the cpu is under.

so if your idleing, doing nothing, your cpu downclocks its speed, and power use = saves you $ on energy bills.

Thats probably why you got a answear of "0.45 to 1.4125V".


@Soulkeeper

why not hit default, and look at what the bios for your motherboard, uses as its default values? Then you can always give it abit more if your overclocking, or less and run stability tests after (if your trying to make it use as little energy as possible).




are you trying to overclock it?:
http://www.overclockers.com/overclocking-amds-llano-apu/

Gigabyte A75M-UD2H:

this motherboard has a default of:
CPU NB VID = 1.18v (again hes giveing it +0.075v because hes overclocking)
CPU voltage = 1.40v (you can see hes giveing it +0.1v because hes overclocking)





3.7ghz

 

[Soulkeeper]

@Soulkeeper

I think thats because of powerstates, like a phenom II, it ll jump up and down in mhz/volt depending on how much stress the cpu is under.

so if your idleing, doing nothing, your cpu downclocks its speed, and power use = saves you $ on energy bills.

Thats probably why you got a answear of "0.45 to 1.4125V".

The ranges can be chosen from with the pstate pairs clock/voltages
I'm mostly trying to figure out the default upper voltage setting that is suggested for:

cpu
gpu/nb/uvd

The one voltage, we as users, need should be used to offset for the various power states.
IE: tell us default cpu voltage is 1.4125v if that's what it is, and "uncore" is 1.25v if that's what it is.

I am having to guess on the "uncore" voltage and this really pisses me off that I had to wait 5 days for a response that didn't address my question.

No documentation !? AMD !?

 

[Soulkeeper]

thanks for uploading the pictures

unlike gigabyte, asrock does not show you or offer any readout for "AUTO/DEFAULT" voltage settings
and they don't offer a "AUTO" for things like "NB/GPU" so i'm left only able to guess

 

[Arkadrel]

which motherboard do you have?
I ll try to download the manual and give it alook.

why not turn off manual, hit default.
reboot, go back and hit manaul, and see what it changed the values too?

 

[Soulkeeper]

^^ according to gigabyte the default "CPU NB" voltage is 1.200v with some vdroop to 1.1875v ?

 

[richierich1212]

Default for my MSI board is 1.18.

 

[Soulkeeper]

What is the default nb frequency you are all getting for your bios ?

 

[richierich1212]

700mhz I think. But I have mine overclocked to 815mhz.

 

[Kristijonas]

I plan on getting A8-3870 on Gigabyte A75M-UD2H, so this is interesting to follow. I know I will have some headache when trying to overclock it myself...

 

[Soulkeeper]

thanks

I still have more questions that a look in the A75M-UD2H bios would answer
ie: is 6x the "nb frequency" default, is 8x the highest "memory clock" setting
thinking i'll have to buy my 3rd llano motherboard to be happy ...

I just love everything i've read about A75M-UD2H

course if I get matx then i'll need a new case too

 

[Kristijonas]

I simply wanted the best motherboard and almost everywhere A75M-UD2H is praised as such (at least among the mATX, and I want mATX because I have no need for multiple connections).

 

[Soulkeeper]

I won't even bother re-asking my question to AMD.
They are obviously inept. It would take a month+ at this rate to get any suggested settings.

forums+guessing are the only substitute for their lack of documentation/tables.

 

[Soulkeeper]

Here is a picture of my bios settings

CPU NB/GFX Voltage does not work.

Because of this:

1.14v is forced regardless of what I choose.
I can't run "GFX Engine Clock" at anything but AUTO
AUTO appears to set it at 600MHz, only options besides AUTO are 626MHz and up (none are stable)
I can't run "CPU NB Frequency Multiplier" stable at anything above 600MHz also

Also, no matter what I set the vcore to I cannot get 3.3 or 3.4GHz stable
3.2GHz is the highest possible stable speed for my A8-3870 with this ASSROCK motherboard. 3.2GHz becomes unstable if I raise the vcore to 1.35 or 1.40v also, which leads me to believe the mothboard simply cannot handle the power draw.

 

[Arkadrel]

.....ASrock.... never again?

I normally buy gigabyte or Asus myself (when it comes to motherboards), exactly for reasons like this.

 

[Soulkeeper]

I emailed asrock telling them about that option not working
I asked them to please verify and fix the problem.
After they translate from english, i'm sure they'll email me back asking what cdrom drive I have or tell me to run some windows app ...

 

[Soulkeeper]

they replied with the following:


"
The function under BIOS setup GFX Engine clock is realted to the clok of the internal video card which is not recommended to change .
Integrated Radeon HD 6550D GPU runs at 600 MHz and has 400 shader units
If you have not stable GFX Engine clock you will not get any display.
"


I just fired off a response:

"
Can you please forward the original email to the bios developers and consider it a feature request.
thank you,

"

 

[Rvenger]

Asrock's support is terrible. I had to send my A75M-HVS to them and it took a month to get it back. Everytime I called them they said they were "testing" it. I bought a Biostar to replace and it came back the next day. It worked perfectly fine but I honestly thought I might not get my board back.