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Old 01-29-11, 02:37 AM   #1
artem
Registered User
 
Join Date: Jun 2006
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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