Solución: Cambiar de placa base, la ga-880gm-ud2h tenía como voltaje mínimo para la ram 1.6, y las mushkin trabajan a 1.5v
Equipo:
Athlon x3 450 3.2 ghz(1,4v) @ 1,35v. Estaba a 1,472v antes de actualizar la bios, pensaba que era ese el problema.
GA-880GM-UD2H, bios F8, actualizada
ASUS x1950 pro 256mb -> quitada para ver si era de la gráfica, ahora está con la integrada
2GB Mushkin Silverline DDR3 1333 mhz
7200.11 500gb+7200.11 1TB
Tacens valeo smart 560W
Memtest (8 horas) y seatools pasados
Pc formateado de windows 7, a windows xp y de nuevo a windows 7 con los últimos drivers y actualizaciones del SO
Servicios en el inicio ajenos a windows:
Amd external events utility
2 archivos del punkbuster
Steam

Informe de BlueScreenView:
==================================================
Dump File : 122810-13478-01.dmp
Crash Time : 28/12/2010 7:19:26
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 0x0000001e
Parameter 2 : 0x00000002
Parameter 3 : 0x00000000
Parameter 4 : 0x82e8499f
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+4682b
File Description : NT Kernel & System
Product Name : Microsoft
Windows
Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122810-13478-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.872
==================================================
Dump File : 122810-21481-01.dmp
Crash Time : 28/12/2010 0:05:22
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 0x0408003a
Parameter 2 : 0x00000002
Parameter 3 : 0x00000001
Parameter 4 : 0x82e420e9
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+4682b
File Description : NT Kernel & System
Product Name : Microsoft
Windows
Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122810-21481-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.872
==================================================
Dump File : 122410-13868-01.dmp
Crash Time : 24/12/2010 15:34:07
Bug Check String : DRIVER_IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x000000d1
Parameter 1 : 0x00000008
Parameter 2 : 0x00000002
Parameter 3 : 0x00000000
Parameter 4 : 0x8c254266
Caused By Driver : afd.sys
Caused By Address : afd.sys+29266
File Description : Ancillary Function Driver for WinSock
Product Name : Sistema operativo Microsoft
Windows
Company : Microsoft Corporation
File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122410-13868-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.912
==================================================
Dump File : 122410-14539-01.dmp
Crash Time : 24/12/2010 14:55:01
Bug Check String : PFN_LIST_CORRUPT
Bug Check Code : 0x0000004e
Parameter 1 : 0x0000009a
Parameter 2 : 0x00035572
Parameter 3 : 0x00000002
Parameter 4 : 0x00000000
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+dcd10
File Description : NT Kernel & System
Product Name : Microsoft
Windows
Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122410-14539-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.912
==================================================
Dump File : 122410-14336-01.dmp
Crash Time : 24/12/2010 14:13:57
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 0x00000005
Parameter 2 : 0x00000002
Parameter 3 : 0x00000000
Parameter 4 : 0x82ec099f
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+4682b
File Description : NT Kernel & System
Product Name : Microsoft
Windows
Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16617 (win7_gdr.100618-1621)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122410-14336-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.912
==================================================
Dump File : 122410-15537-01.dmp
Crash Time : 24/12/2010 13:01:42
Bug Check String : KERNEL_MODE_EXCEPTION_NOT_HANDLED
Bug Check Code : 0x1000008e
Parameter 1 : 0xc0000005
Parameter 2 : 0x8c2104a0
Parameter 3 : 0x869ba98c
Parameter 4 : 0x00000000
Caused By Driver : afd.sys
Caused By Address : afd.sys+44a0
File Description : Ancillary Function Driver for WinSock
Product Name : Sistema operativo Microsoft
Windows
Company : Microsoft Corporation
File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122410-15537-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.912
==================================================
Dump File : 122410-16551-01.dmp
Crash Time : 24/12/2010 5:03:30
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 0x00000006
Parameter 2 : 0x00000002
Parameter 3 : 0x00000000
Parameter 4 : 0x82ea999f
Caused By Driver : halmacpi.dll
Caused By Address : halmacpi.dll+fe87
File Description : Hardware Abstraction Layer DLL
Product Name : Microsoft
Windows
Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Processor : 32-bit
Computer Name :
Full Path : C:\Windows\Minidump\122410-16551-01.dmp
Processors Count : 3
Major Version : 15
Minor Version : 7600
Dump File Size : 144.912