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Old 01-29-11, 02:37 AM   #1
artem
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Posts: 704
Unhappy [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

Since 260.12.19 (a clear regression) overclocking on 8XXX class GPUs is broken. 270.18 beta drivers also have this problem.

Downclocking works well:
Code:
$ nvclock -m 200 -n 200
Requested memory clock:         200.000 MHz
Requested core clock:           200.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   200.000 MHz
GPU clock:      200.000 MHz
Now let's try to revert to the original clocks (650/900):
Code:
nvclock -r
Your nVidia Geforce 8800GT has been restored to its original clocks
Memory clock:   950.000 MHz
GPU clock:      200.000 MHz
NVIDIA driver doesn't restore GPU clock. However if I try to restore GPU clocks incrementally, it works:

Code:
[artem@localhost tmp]$ nvclock -n 300
Requested core clock:           300.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      200.000 MHz

[artem@localhost tmp]$ nvclock -n 250
Requested core clock:           250.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      250.000 MHz

[artem@localhost tmp]$ nvclock -n 330
Requested core clock:           330.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      250.000 MHz

[artem@localhost tmp]$ nvclock -n 300
Requested core clock:           300.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      300.000 MHz

[artem@localhost tmp]$ nvclock -n 400
Requested core clock:           400.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      300.000 MHz

[artem@localhost tmp]$ nvclock -n 350
Requested core clock:           350.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      350.000 MHz

[artem@localhost tmp]$ nvclock -n 400
Requested core clock:           400.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      400.000 MHz

[artem@localhost tmp]$ nvclock -n 500
Requested core clock:           500.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      500.000 MHz

[artem@localhost tmp]$ nvclock -n 650
Requested core clock:           650.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      500.000 MHz

[artem@localhost tmp]$ nvclock -n 600
Requested core clock:           600.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      600.000 MHz

[artem@localhost tmp]$ nvclock -n 650
Requested core clock:           650.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GT
Memory clock:   950.000 MHz
GPU clock:      650.000 MHz
Aaron, zander, please reopen the internal ticket for this issue.
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Old 01-31-11, 12:16 PM   #2
artem
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

I'm gonna be persistent.
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Old 02-02-11, 04:46 AM   #3
artem
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

And mildly annoying.
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Old 02-02-11, 09:13 AM   #4
Licaon
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

Quote:
Originally Posted by artem View Post
And mildly annoying.
shouldn't you be actually annoying the nvclock devs ?
wasn't nvclock dead since the dev is working on another thing ?
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Old 02-02-11, 10:14 AM   #5
ShiningArcanine
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

Considering that nvclock is a third party tool, I think you probably should demonstrate that this does not work with nvidia-settings before you complain here.
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Old 02-02-11, 10:16 AM   #6
jeisom
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

NVclock uses coolbits, the same that nvidia-setting uses, for overclocking on newer cards
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Old 02-03-11, 01:33 PM   #7
artem
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

thanks, jeisom, for answering Licaon and ShiningArcanine concerns.

Yes, this bug also holds true when using the official `nvidia-settings` utility.
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Old 02-04-11, 08:24 AM   #8
drhirsch
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

At least you have some down/overclocking ability. I lost mine when I switched out my good ol 8800 and replaced it with a 460, which has, alas, no ability to change clocks at all.
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Old 02-04-11, 09:08 AM   #9
artem
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

drhirsch

Really? Do you at least have different (automatically applied) performance levels?
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Old 02-04-11, 10:25 PM   #10
adamlau
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

I'll join you in being persistent...
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Old 02-04-11, 10:26 PM   #11
adamlau
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

And on being mildly annoying...
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Old 02-04-11, 10:27 PM   #12
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Default Re: [270.18] Overclocking is _still_ broken for 8xxx (probably 9xxx too) class GPUs

Until I see some overclocking support for Fermi...
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