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GPU-Z and PowerColor 5850 PCS+

luigimita

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#1
Hi, gpu-z ver. 0.3.8 don't read this information of my 5850 card :

- VDDC Current
- VDDC Phase #1
- VDDC Phase #2
- VDDC Phase #3
- VDDC

Why?

 

erocker

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#2
If I'm not mistaken, the PCS+ version uses different voltage regulators from a standard 5850 that have no sensors to read anythng with.
 
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#3
Actually that isn't completely true.
Yes PCS+ has a different voltage regulator, but AMD GPU Clock Tool can read the voltage, at least it seems to be able to.
Attached some pics showing the change in voltage when idle and when in 3d.. I think its in 3d anyway... well when the clocks go up when starting gpu-z.
The voltage goes from VDDC: 1.0880 (gpu-z starting causes clocks to go up to 900/1150) to VDDC: 1.0000 (157/300 when gpu idles).
AMDGPUClockTool reading 5850 PCS+ voltage (1.0880 at 3d).jpg AMDGPUClockTool reading 5850 PCS+ voltage (1 at idle).jpg
 

W1zzard

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#4
amd gpu clock tools shows the voltage that the gpu thinks it is getting, this is not a readback of the actual setting on the regulator but only the information that the gpu is driving out to the voltage regulator. actually it doesnt even read the voltage from anything, it only reads a VID code that is defined in the bios to be 1.0880V for example (the bios is also where the table of voltages in the dropdown comes from)
 
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#5
Oh, so it really was just reading the bios. I guess there really is no way of taking a reading off the 5850 pcs+ without actually sticking a multimeter to it.
 

W1zzard

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#6
if you want a reading that you can trust, always use a multimeter
 
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Case haf 912
Audio Device(s) auzen forte
Power Supply ocz 750
Software win7 x64
Benchmark Scores -a gazillion points in everything
#7
Umm...
Wizzard, would you happen to have a data sheet on the uP6219 voltage controller that the 5850pcs+ uses or happen know where the feedback and ground is since I wanna try a volt mod on it.
I would appreciate any help.