al@al-desktop:~$ nvclock -T
It seems your card isn't officialy supported in NVClock yet.
The reason can be that your card is too new.
If you want to try it anyhow [DANGEROUS], use the option -f to force the setting(s).
NVClock will then assume your card is a 'normal', it might be dangerous on other cards.
Also please email the author the pci_id of the card for further investigation.
[Get that value using the -i option].

al@al-desktop:~$ nvclock -T -f
Error: temperature monitoring isn't supported on your videocard.
al@al-desktop:~$ nvclock -f -i
-- General info --
Card:       Unknown Nvidia card
Architecture:    GC8 A1
PCI id:    0x0
GPU clock:    -2147483.750 MHz
Bustype:    PCI

-- Memory info --
Amount:    0 MB
Type:       128 bit SDR
Clock:       -2147483.750 MHz

al@al-desktop:~$ nvclock -f -d -T
m=0 n=0 p=0
m=0 n=0 p=0
m=0 n=0 p=0
m=0 n=0 p=0
Error: temperature monitoring isn't supported on your videocard.
al@al-desktop:~$ sudo mc
[sudo] password for al: