A10-7870K "last review of AMD until Zen"

[farmerboy-86]

I think, its the same as my side, more sweetpoint is 4600 MHz with lower voltage than 4700 MHz at max voltage

agreed 1.5v + is more than im willing to use for everyday use 4.7ghz didnt gain much better results to justify thhe extra voltage needed tbh

are you using manual voltage or offset and is there much difference??

im not used to offset coming from am3+ socket all my boards used manual so im unsure which is better??

crossblade can do either

 

[farmerboy-86]

With offset voltage and cool and quiet enabled it means your motherboard vrms and phases + cpu cores are able to idle at lower voltage and temps when the cpu cores are idling.
If 90% of the time you're sat idling then offset is the best way.

my voltage drops when cpu isn't under load now on manual though?

or is that v drop?

idle and browsing it uses 1.43 when i put it under load 1.46v

 

[farmerboy-86]

Flank3r what bios settings are you using for cpu power saving if any?

 

[Davedree]

On idle with an offset V-core you'll see voltage of around 0.8-0.9v depending on your Vid of your cpu and the offset setting.

Vdroop is carried out by your LLC + your v-core setting in the bios.

 

[farmerboy-86]

On idle with an offset V-core you'll see voltage of around 0.8-0.9v depending on your Vid of your cpu and the offset setting.

Vdroop is carried out by your LLC + your v-core setting in the bios.

Just tried offest mode and it doesn't drop anymore than manual mode on idle? But when I pit prime small fft stress on It went up to 1.49v

Whereas manual mode only goes to 1.46 I set it too?? Odd

What I did was set offset so its its 1.46v but it goes way above that under load am setting something wrong??

 

[Davedree]

Just tried offest mode and it doesn't drop anymore than manual mode on idle? But when I pit prime small fft stress on It went up to 1.49v

Whereas manual mode only goes to 1.46 I set it too?? Odd

What I did was set offset so its its 1.46v but it goes way above that under load am setting something wrong??

Which energy settings have you played with in the bios, and in windows is your power plan set to balanced. Manual voltage even with all the power settings on won't drop the voltage down to below the maximum, only offset will allow this.

You have to calculate the offset on the vid of your apu and then tweak you llc.
Here's my little guide http://forums.overclockers.co.uk/showpost.php?p=27630190&postcount=222

 

[farmerboy-86]

I have power now on but all others of c6 spread spectrum ect. Power plan is on performance I'm pretty sure as I was told this is best.

My llc is set on high maybe try regular then?

Also I have cpuz open and it does drop below 1.46v on manual to 1.43v

 

[Davedree]

I have power now on but all others of c6 spread spectrum ect. Power plan is on performance I'm pretty sure as I was told this is best.

My llc is set on high maybe try regular then?

Also I have cpuz open and it does drop below 1.46v on manual to 1.43v

Send us a screenprint of your cpu-z and hwmonitor if you can.
1.43v isn't a correct idle voltage, a real idle voltage is 0.8-0.9v.

 

[farmerboy-86]

Send us a screenprint of your cpu-z and hwmonitor if you can.
1.43v isn't a correct idle voltage, a real idle voltage is 0.8-0.9v.

Here is my cpuz and hw monitor (hw monitor doesnt read apu temps right at all)

Spoiler

as you can see in pic idle is 1.448v and that goes up to 1.468v on load

also power saving as follows

amd power now on
nx mode off
svm off
apm master off c6 off
iommu off
cpb mode auto

manual voltage set @ 1.46v
cpnb 1.3v
dram 1.6v

rest all on auto voltage

llc high
cpu/nb llc high

 

[Davedree]

Try disabling cpb (turbo boost) in the bios, as with it enabled you are governed by the apu's vid and p-states, which affects the voltage set.
Disabling cpb, it might reduce your set voltage so you might lose stability until you get your voltage tuned again.

The p-states can be seen when you run msrtweaker.
Also I think for Amd the power setting in windows needs to be set to balanced otherwise you won't get the freqency to drop down to P-7 which is idle clock.

 

[farmerboy-86]

Try disabling cpb (turbo boost) in the bios, as with it enabled you are governed by the apu's vid and p-states, which affects the voltage set.
Disabling cpb, it might reduce your set voltage so you might lose stability until you get your voltage tuned again.

The p-states can be seen when you run msrtweaker.
Also I think for Amd the power setting in windows needs to be set to balanced otherwise you won't get the freqency to drop down to P-7 which is idle clock.

Hey all very strange on my end did as you said disabled cpb and set power to balances and voltage doesn't drop in cpuz stays @ 1.44v and underload goes to 1.46v

Also I was using offset mode

Tried all ways didn't make blind bit of difference

On my sons rig 7850k apu and Asus a88xm-plus motherboard it does drop down to very low voltage on idle

This wont at all

 

[farmerboy-86]

Cracked it!! sat laughing at myself for a while i recently swapped my os ssd to a bigger one and forgot to install ai suite anyways just installed it and now its dropping to 1.7ghz whhile idle and browsing and under load its going up

Spoiler

cant believe i needed this installed but im not complaining

 

[Davedree]

Well done old boy, not sure why that ai suite not installed would stop it from working. But there's the idle clocks and low voltage I was on about so good progress.

 

[farmerboy-86]

Well done old boy, not sure why that ai suite not installed would stop it from working. But there's the idle clocks and low voltage I was on about so good progress.

indeed got there in the end!
im unsure why ai suite has to be installed tbh.

Its very strange to think a program would hhave a impact on this when its all set through bios but we live and learn had me scratching my head for a while

thanks for nudging me the right direction though

 

[FlanK3r]

Hope, you are happy with your 7870K. Seems very good with your settings!

 

[Scougar]

Was reading this thread a few times, and decided to finally go back and turn on Power Now so it would de-clock when I don't need the performance. Seems silly to have it running at 4.5Ghz constantly. Will see how that affects things in games though. I 'may' have to have a profile for games and the profile for normal usage.

Also, I will see if I can get a higher overclock with less voltage since I've got an R9 380 on the way for graphics instead of the APU's iGPU.

Note: I am very happy with the performance of my graphics from this chip, I think it's incredible for inbuilt graphics. Dirt 3 was pretty much on max settings with it at 1680*1050 and getting really good frame rates (over 60).