I have a feeling that this is the same problem, but this topic actually includes useful diagnostic information:
http://forum.driverpacks.net/viewtopic.php?id=4614

More info:

Does the same on HP Compaq dc7900 SFF.

I1 driver from DP_Graphics_B_wnt5_x86-32_912 works just fine.  I'm not sure about the DriverPack versions between the latest and this one (12/2009).

http://img130.imageshack.us/img130/584/dc7900drverr.png

=========== 
PCI Devices 
=========== 
PCI\VEN_8086&DEV_10DE&SUBSYS_3034103C&REV_02\3&B1BFB68&0&C8 : Intel(R) 82567LM-3 Gigabit Network Connection
PCI\VEN_8086&DEV_244E&SUBSYS_00000000&REV_A2\3&B1BFB68&0&F0 : Intel(R) 82801 PCI Bridge - 244E
PCI\VEN_8086&DEV_2E10&SUBSYS_00000000&REV_03\3&B1BFB68&0&00 : Intel(R) 4 Series Chipset Processor to I/O Controller - 2E10
PCI\VEN_8086&DEV_2E12&SUBSYS_3034103C&REV_03\3&B1BFB68&0&10 : Intel(R) Q45/Q43 Express Chipset
PCI\VEN_8086&DEV_2E13&SUBSYS_3034103C&REV_03\3&B1BFB68&0&11 : Intel(R) Q45/Q43 Express Chipset
PCI\VEN_8086&DEV_2E14&SUBSYS_3034103C&REV_03\3&B1BFB68&0&18 : Intel(R) Management Engine Interface
PCI\VEN_8086&DEV_2E16&SUBSYS_3034103C&REV_03\3&B1BFB68&0&1A : Standard Dual Channel PCI IDE Controller
PCI\VEN_8086&DEV_2E17&SUBSYS_3034103C&REV_03\3&B1BFB68&0&1B : Intel(R) Active Management Technology - SOL (COM3)
PCI\VEN_8086&DEV_3A02&SUBSYS_3034103C&REV_02\3&B1BFB68&0&FA : Intel(R) ICH10D/DO SATA AHCI Controller
PCI\VEN_8086&DEV_3A14&SUBSYS_00000000&REV_02\3&B1BFB68&0&F8 : Intel(R) ICH10DO LPC Interface Controller - 3A14
PCI\VEN_8086&DEV_3A64&SUBSYS_3034103C&REV_02\3&B1BFB68&0&E8 : Intel(R) ICH10 Family USB Universal Host Controller - 3A64
PCI\VEN_8086&DEV_3A65&SUBSYS_3034103C&REV_02\3&B1BFB68&0&E9 : Intel(R) ICH10 Family USB Universal Host Controller - 3A65
PCI\VEN_8086&DEV_3A66&SUBSYS_3034103C&REV_02\3&B1BFB68&0&EA : Intel(R) ICH10 Family USB Universal Host Controller - 3A66
PCI\VEN_8086&DEV_3A67&SUBSYS_3034103C&REV_02\3&B1BFB68&0&D0 : Intel(R) ICH10 Family USB Universal Host Controller - 3A67
PCI\VEN_8086&DEV_3A68&SUBSYS_3034103C&REV_02\3&B1BFB68&0&D1 : Intel(R) ICH10 Family USB Universal Host Controller - 3A68
PCI\VEN_8086&DEV_3A69&SUBSYS_3034103C&REV_02\3&B1BFB68&0&D2 : Intel(R) ICH10 Family USB Universal Host Controller - 3A69
PCI\VEN_8086&DEV_3A6A&SUBSYS_3034103C&REV_02\3&B1BFB68&0&EF : Intel(R) ICH10 Family USB Enhanced Host Controller - 3A6A
PCI\VEN_8086&DEV_3A6C&SUBSYS_3034103C&REV_02\3&B1BFB68&0&D7 : Intel(R) ICH10 Family USB Enhanced Host Controller - 3A6C
PCI\VEN_8086&DEV_3A6E&SUBSYS_3034103C&REV_02\3&B1BFB68&0&D8 : Microsoft UAA Bus Driver for High Definition Audio
PCI\VEN_8086&DEV_3A70&SUBSYS_00000000&REV_02\3&B1BFB68&0&E0 : Intel(R) ICH10 Family PCI Express Root Port 1 - 3A70
PCI\VEN_8086&DEV_3A78&SUBSYS_00000000&REV_02\3&B1BFB68&0&E4 : Intel(R) ICH10 Family PCI Express Root Port 5 - 3A78
21 matching device(s) found.
 
=========== 
USB Devices 
=========== 
USB\ROOT_HUB\4&10D7EC80&0                                   : USB Root Hub
USB\ROOT_HUB\4&16401871&0                                   : USB Root Hub
USB\ROOT_HUB\4&1EFA7CA6&0                                   : USB Root Hub
USB\ROOT_HUB\4&1FC429A1&0                                   : USB Root Hub
USB\ROOT_HUB\4&2DE6B9C7&0                                   : USB Root Hub
USB\ROOT_HUB\4&3933D92B&0                                   : USB Root Hub
USB\ROOT_HUB20\4&141502E6&0                                 : USB Root Hub
USB\ROOT_HUB20\4&378DF057&0                                 : USB Root Hub
USB\VID_046D&PID_C018\5&250B01A4&0&1                        : USB Human Interface Device
USB\VID_046D&PID_C312\5&250B01A4&0&2                        : USB Composite Device
USB\VID_046D&PID_C312&MI_00\6&29F9BAC2&0&0000               : USB Human Interface Device
USB\VID_046D&PID_C312&MI_01\6&29F9BAC2&0&0001               : USB Human Interface Device
12 matching device(s) found.
 
============= 
Input Devices 
============= 
HID\VID_046D&PID_C018\6&1CE8431A&0&0000                     : HID-compliant mouse
HID\VID_046D&PID_C312&MI_00\7&934DC66&0&0000                : HID Keyboard Device
HID\VID_046D&PID_C312&MI_01&COL01\7&2D0C1A28&0&0000         : HID-compliant device
HID\VID_046D&PID_C312&MI_01&COL02\7&2D0C1A28&0&0001         : HID-compliant consumer control device
HID\VID_046D&PID_C312&MI_01&COL03\7&2D0C1A28&0&0002         : HID-compliant device
5 matching device(s) found.
 
============ 
ACPI Devices 
============ 
ACPI\FIXEDBUTTON\2&DABA3FF&0                                : ACPI Fixed Feature Button
ACPI\GENUINEINTEL_-_X86_FAMILY_6_MODEL_23\_0                : Intel(R) Core(TM)2 Duo CPU     E7300  @ 2.66GHz
ACPI\GENUINEINTEL_-_X86_FAMILY_6_MODEL_23\_1                : Intel(R) Core(TM)2 Duo CPU     E7300  @ 2.66GHz
ACPI\IFX0102\1                                              : Infineon Trusted Platform Module
ACPI\PNP0000\4&3AB037A0&0                                   : Programmable interrupt controller
ACPI\PNP0003\1                                              : Advanced programmable interrupt controller
ACPI\PNP0100\4&3AB037A0&0                                   : System timer
ACPI\PNP0103\1                                              : High Precision Event Timer
ACPI\PNP0200\4&3AB037A0&0                                   : Direct memory access controller
ACPI\PNP0303\4&3AB037A0&0                                   : Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
ACPI\PNP0401\4&3AB037A0&0                                   : ECP Printer Port (LPT1)
ACPI\PNP0501\1                                              : Communications Port (COM1)
ACPI\PNP0700\4&3AB037A0&0                                   : Standard floppy disk controller
ACPI\PNP0800\4&3AB037A0&0                                   : System speaker
ACPI\PNP0A08\2&DABA3FF&0                                    : PCI bus
ACPI\PNP0B00\4&3AB037A0&0                                   : System CMOS/real time clock
ACPI\PNP0C01\2&DABA3FF&0                                    : System board
ACPI\PNP0C02\1                                              : Motherboard resources
ACPI\PNP0C02\2                                              : Motherboard resources
ACPI\PNP0C02\3                                              : Motherboard resources
ACPI\PNP0C04\4&3AB037A0&0                                   : Numeric data processor
ACPI\PNP0C0C\2&DABA3FF&0                                    : ACPI Power Button
ACPI\PNP0C14\0                                              : Microsoft Windows Management Interface for ACPI
ACPI\PNP0F13\4&3AB037A0&0                                   : Synaptics PS/2 Port Compatible TouchPad
ACPI_HAL\PNP0C08\0                                          : Microsoft ACPI-Compliant System
ROOT\ACPI_HAL\0000                                          : ACPI Multiprocessor PC
26 matching device(s) found.
 
============ 
 HDA Audio 
============ 
No matching devices found.
 
============ 
RAID Devices 
============ 
PCI\VEN_8086&DEV_2E16&SUBSYS_3034103C&REV_03\3&B1BFB68&0&1A
    Name: Standard Dual Channel PCI IDE Controller
    Hardware ID's:
        PCI\VEN_8086&DEV_2E16&SUBSYS_3034103C&REV_03
        PCI\VEN_8086&DEV_2E16&SUBSYS_3034103C
        PCI\VEN_8086&DEV_2E16&CC_010185
        PCI\VEN_8086&DEV_2E16&CC_0101
    Compatible ID's:
        PCI\VEN_8086&DEV_2E16&REV_03
        PCI\VEN_8086&DEV_2E16
        PCI\VEN_8086&CC_010185
        PCI\VEN_8086&CC_0101
        PCI\VEN_8086
        PCI\CC_010185
        PCI\CC_0101
PCI\VEN_8086&DEV_3A02&SUBSYS_3034103C&REV_02\3&B1BFB68&0&FA
    Name: Intel(R) ICH10D/DO SATA AHCI Controller
    Hardware ID's:
        PCI\VEN_8086&DEV_3A02&SUBSYS_3034103C&REV_02
        PCI\VEN_8086&DEV_3A02&SUBSYS_3034103C
        PCI\VEN_8086&DEV_3A02&CC_010601
        PCI\VEN_8086&DEV_3A02&CC_0106
    Compatible ID's:
        PCI\VEN_8086&DEV_3A02&REV_02
        PCI\VEN_8086&DEV_3A02
        PCI\VEN_8086&CC_010601
        PCI\VEN_8086&CC_0106
        PCI\VEN_8086
        PCI\CC_010601
        PCI\CC_0106
2 matching device(s) found.