My 9800 Pro does not have a temperature reader.
Most people don't need to know their VGA temperature unless they play with the Voltage, changing the MHz will only increase the temperature a very little. People increase Voltage to increase stability to a piece of hardware, increasing the MHz and NOT the Voltage will keep the card temperature about the same.
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]