6800GS fan control problem

[Mars2000]

Hi,

I bought a 6800GS card. I set up a 50 50 50 fan profile and checked the startup adjust checkbox. But when I run some 3D games, the fan won't stick with 50% duty cycle. It'll become 100% when the core temperature reach 70C. That makes very large noise. I found nothing about low-level temperature control but only driver control. What should I do now to stick the fan with 50% duty cycle? Thanks.


$ffffffffff ----------------------------------------------------------------
$ffffffffff Northbridge information
$ffffffffff ----------------------------------------------------------------
$0400000000 Description : unknown
$0400000001 Vendor ID : 8086 (Intel)
$0400000002 Device ID : 2770
$0400000003 AGP bus : not supported
$ffffffffff ----------------------------------------------------------------
$ffffffffff Display adapter information
$ffffffffff ----------------------------------------------------------------
$0000000000 Description : NVIDIA GeForce 6800 GS
$0000000001 Vendor ID : 10de (NVIDIA)
$0000000002 Device ID : 00c0
$0000000003 Location : bus 1, device 0, function 0
$0000000004 Bus type : PCIE
$000000000f PCIE link width : 16x supported, 16x selected
$0000000009 Base address 0 : e0000000 (memory range)
$000000000a Base address 1 : c0000000 (memory range)
$000000000b Base address 2 : none
$000000000c Base address 3 : e1000000 (memory range)
$000000000d Base address 4 : none
$000000000e Base address 5 : none
$ffffffffff ----------------------------------------------------------------
$ffffffffff NVIDIA specific display adapter information
$ffffffffff ----------------------------------------------------------------
$0100000000 Graphics core : NV42 revision A1 (12pp,5vp)
$0100000001 Hardwired ID : 00c0 (ROM strapped to 00c0)
$0100000002 Memory bus : 256-bit
$0100000003 Memory type : DDR3 (RAM configuration 05)
$0100000004 Memory amount : 524288KB
$0100000005 Core clock : 351.000MHz
$0100000006 Memory clock : 598.500MHz (1197.000MHz effective)
$0100000007 Reference clock : 27.000MHz
$ffffffffff ----------------------------------------------------------------
$ffffffffff NVIDIA VGA BIOS information
$ffffffffff ----------------------------------------------------------------
$1100000000 Title : GeForce 6800 GTS VGA BIOS
$1100000002 Version : 5.41.02.49.04
$1100000100 BIT version : 1.00
$1100000200 Core clock : 300MHz
$1100000201 Memory clock : 700MHz
$1100010000 Performance level 0 : 350MHz/600MHz/1.22V/53%
$1100010001 Performance level 1 : 475MHz/600MHz/1.37V/53%
$1100020000 VID bitmask : 00000011b
$1100020100 Voltage level 0 : 1.22V, VID 00000000b
$1100020101 Voltage level 1 : 1.37V, VID 00000001b
$1100020102 Voltage level 2 : 0.00V, VID 00000000b
$1100030001 Core thermal compensation : 4C
$1100030002 Core thermal threshold : 125C/115C/70C
$1100030003 Ambient thermal threshold : 110C/100C