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How to set amd a8 3870k igpu memory bandwith?

Tags:
  • Radeon
  • RAM
  • AMD
  • Memory
  • Graphics
Last response: in Graphics & Displays
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November 14, 2012 7:22:40 PM

Hello,

recently i bought a amd apu- a8 3870k
but i cannot figure out how to set the memory bandwith of the igpu.

i know that the memory bandwidth of igpu depends on the ram frequency.

i have a corsair vengeance 4 gb 1600 mhz ram which i have overclocked to 1866 mhz.

but when i run gpuz instead of showing memory bandwidth 933 mhz it shows 100 mhz only ..cpuz shows ram freq 931 mhz.

can some one help me out?

here are the screen shots

gpu - http://gpuz.techpowerup.com/12/11/14/bga.png

cpuz -
ram-http://imageshack.us/f/35/60004008.png/

cpu -http://img4.imageshack.us/img4/4430/97853985.png

thank you.

More about : set amd 3870k igpu memory bandwith

a b À AMD
a b } Memory
November 14, 2012 7:37:56 PM

looks pretty normal.

leave cpu-z open and run a program. what happens ?
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November 14, 2012 7:52:22 PM

swifty_morgan said:
looks pretty normal.

leave cpu-z open and run a program. what happens ?

morgan the problem is not with cpuz but gpuz ..in case of gpuz ,the memory bandwidth is showing 100 mhz also when any gpu based application is running , instead of 933 mhz, .. though my ram is working at 933 mhz :(  i want to know why .. :(  plz help
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November 14, 2012 7:59:38 PM

the IGPU idling? it may down clock when it's not being used. i don't own an APU so im not sure... but both my CPU and GPU down clock when they're not being used.
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a b À AMD
a b } Memory
November 14, 2012 8:00:13 PM

933x2=1866

the 100Mz is idle speed. normal.



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a b À AMD
November 14, 2012 8:20:50 PM

just out of curiosity, what happens when you click on the small questionmark next to the 'bus interface:fusion'? It'll start a small render test, but will it have any effect on anything when you start it?
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November 14, 2012 8:25:33 PM

no the gpu is not in idle state .. i have checked gpuz sensor tab on load state.. here is the screen shot of gpuz sensor tab showing the highest reading of gpu clock , gpu memory clock ..see it is showing 100 mhz on max load..

http://gpuz.techpowerup.com/12/11/14/hrg.png
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November 14, 2012 8:32:21 PM

Kari said:
just out of curiosity, what happens when you click on the small questionmark next to the 'bus interface:fusion'? It'll start a small render test, but will it have any effect on anything when you start it?



it starts a rendering test ..which cause my gpu to run in max load...but during this test on load.. the usage of memory bandwidth should increase but it is not happening in my case .its showing same 100 mhz...
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a b À AMD
November 14, 2012 8:40:55 PM

well that is a bit odd, I also think it should show 933 as the mem clock...
though 100MHz is the bus interface clock for the cpu part in the apu, so it's likely showing that instead. I dont think the actuall memory clock can even be 100MHz so it's likely just some reading error in gpu-z...
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a b À AMD
a b } Memory
November 14, 2012 8:48:41 PM

does that cpu have a multiplier ? ( BIOS )
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November 14, 2012 8:49:23 PM

Kari said:
well that is a bit odd, I also think it should show 933 as the mem clock...
though 100MHz is the bus interface clock for the cpu part in the apu, so it's likely showing that instead. I dont think the actuall memory clock can even be 100MHz so it's likely just some reading error in gpu-z...


yes ..it might be the fault of gpuz only...ok thn can u suggest me an alternative software which will show the same details as gpuz?
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November 14, 2012 8:49:44 PM

swifty_morgan said:
does that cpu have a multiplier ? ( BIOS )

yes my apu is an unlocked one ..& it has multiplier.
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a b À AMD
a b } Memory
November 14, 2012 9:03:52 PM

if you take that number and multiply it by 100Mz do you get the stock speed of your processor ?
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November 14, 2012 9:07:54 PM

swifty_morgan said:
if you take that number and multiply it by 100Mz do you get the stock speed of your processor ?



yes.. of course ..

my current multiplier -30 x
fsb -100

core- 3.0 ghz
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a b À AMD
a b } Memory
November 14, 2012 9:11:12 PM

then i guess you're worrying over nothing.

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November 14, 2012 9:38:27 PM

Chances are that gpu-z is showing the wrong values for the memory clock and bandwidth.
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November 14, 2012 9:42:35 PM

nforce4max said:
Chances are that gpu-z is showing the wrong values for the memory clock and bandwidth.

can u suggest me an alternative software which will show the same details as gpuz?
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November 14, 2012 9:44:09 PM

bick9804 said:
can u suggest me an alternative software which will show the same details as gpuz?


It shows actual clocks unlike gpu-z and often cpu-z. http://www.hwinfo.com/ It is also great at hunting down AMD Llano chips that have a broken clock divider (mobile).
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November 14, 2012 10:26:51 PM

Best answer selected by bick9804.
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November 14, 2012 10:37:56 PM

so finally figured it out ....gpuz was showing wrong readings..

checked & verified it with evga precision & hwinfo both showed memory clock 933 mhz :) 

http://www.freeimagehosting.net/f3r5u

..thank you every one ..for the help
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