Hi Claggy,
I did a general cleaning, heatsinks too, but the inner airflow of the case must be better regulated. I built a airstream cunductor from hard paper and set it in between CPU1 and CPU2 so the hot air from CPU1 goes upwards now and not to CPU2 directly. Some measurement with AIDA64 Extreme Edition will help a bit. Outside it is cool now I can open the window. Roomtemp is 21 grd celsius at the moment.
Looks like my conductor did not help a lot.
Informationsliste   Wert
Sensor Eigenschaften   
Sensortyp   Dual ADT7490  (SMBus 2Ch, 2Eh)
GPU Sensortyp   Diode, CHiL CHL8266  (NV-Diode, 46h)
Motherboard Name   Intel D5400XS
   
Temperaturen   
CPU1   39 °C  (102 °F)
CPU2   57 °C  (135 °F)
1. CPU / 1. Kern   40 °C  (104 °F)
1. CPU / 2. Kern   22 °C  (72 °F)
1. CPU / 3. Kern   36 °C  (97 °F)
1. CPU / 4. Kern   33 °C  (91 °F)
2. CPU / 1. Kern   29 °C  (84 °F)
2. CPU / 2. Kern   26 °C  (79 °F)
2. CPU / 3. Kern   29 °C  (84 °F)
2. CPU / 4. Kern   29 °C  (84 °F)
DIMM   74 °C  (165 °F)
GPU Diode   68 °C  (154 °F)
Temperatur 1   36 °C  (97 °F)
Temperatur 2   44 °C  (111 °F)
Temperatur 3   45 °C  (113 °F)
FB-DIMM1   78 °C  (172 °F)
FB-DIMM2   84 °C  (183 °F)
FB-DIMM3   78 °C  (172 °F)
FB-DIMM4   70 °C  (158 °F)
ST31000340NS   35 °C  (95 °F)
   
Kühllüfter   
CPU1   629 RPM
CPU2   618 RPM
North Bridge   1856 RPM
South Bridge   4278 RPM
Aux   531 RPM
Grafikprozessor (GPU)   2790 RPM  (70%)
   
Spannungswerte   
CPU1 Kern   1.137 V
CPU2 Kern   1.125 V
+1.5 V   1.536 V
+3.3 V   3.352 V
+5 V   5.125 V
+12 V   12.250 V
FSB VTT   1.211 V
North Bridge Kern   1.250 V
DIMM   1.823 V
GPU Kern   0.975 V
GPU +12V   12.109 V
GPU VRM   0.939 V
   
Strom Werte   
GPU VRM   58.50 A
   
Leistungswerte   
GPU VRM   54.75 W
~~~~~~~~~~~~~~~~~~~~~
machine runs empty, still GPU GTX570 works
27.11.2011 15:40:37      NVIDIA GPU 0: GeForce GTX 570 (driver version 26658, CUDA version 3020, compute capability 2.0, 1248MB, 1405 GFLOPS peak)
It runs a pg wu(PPS Sieve) in 598 sec

heinz

I found the Northbridge heatsink (40 x 40 x 5mm) make noise and the FB-DIMM heatsinks is too slow and sometimes it hung so both must be replaced in the next days. CPU2 is the right CPU if you look into the case. It seems the sensor or AIDA64 has a problem and reports wrong value.
Or now compound paste, bu I cant believe it....

heinz

28th of November boinc_total_200_Mio 

and my laptop i3 GT540M get 15Mio_primegrid
heinz

it was a short time (1 hour) and driver crashes...
must power off now

Today I got some work from seti GPU and CPU. All are done now. One has  a -9 error, others looks OK, some are waiting to confirm
http://setiathome.berkeley.edu/results.php?userid=8071209

heinz

Make it look like this. This is how I have my pc. I've tied the bottom of the fan to the chassis and the top to the cpu heatsink.

With 2 CPUs and 3 high performance GPUs it's impossible to keep low temperatures with the case closed unless you watercool all of them. And even with the case open you will still need a fan placed as I've shown you, to force air between the graphics cards. I use a 38mm thick fan for high static pressure in order to push air as hard as possible in whatever cracks are open.

Where are the FB-DIMMS located? I can't locate them clearly from the photo. Are they those things between the CPUs and the top card? Have you tried something like these http://www.computeruniverse.net/products/e90199636/corsair-dominator-airflow-cooling-fan.asp?sr=corsair+dominator+fan  http://www.computeruniverse.net/products/e90322367/corsair-dominator-airflow-fan-triple-kit.asp?sr=corsair+dominator+fan

You could also change some things in your CPUs. What thickness are the fans on the thermalrights? Those thermalrights have high density fins and they perform better with high static pressure fans, that is 38mm fans. Or use dual fans in each thermalright in a push-pull config (this will also help with the following).

Also there is a huge hot spot between the two CPUs. You'll need to get the air moving in the space between the two heatsinks. Move the fan from the left heatsink to the front of it, pushing instead of pulling air.

IceQ HD4670 AGP
~~~~~~~~~~~

if I run OpenCL device query, it shows:
CL_PLATFORM_NAME:      AMD Accelerated Parallel Processing
CL_PLATFORM_VERSION:   OpenCL 1.1 AMD-APP-SDK-v2.5 (793.1)
OpenCL SDK Revision:   7027912


OpenCL Device Info:

2 devices found supporting OpenCL:

---------------------------------
Device ATI RV730
---------------------------------
  CL_DEVICE_NAME:                       ATI RV730
  CL_DEVICE_VENDOR:                     Advanced Micro Devices, Inc.
  CL_DRIVER_VERSION:                    CAL 1.4.1607
  CL_DEVICE_VERSION:                    OpenCL 1.0 AMD-APP-SDK-v2.5 (793.1)
  CL_DEVICE_TYPE:                       CL_DEVICE_TYPE_GPU
  CL_DEVICE_MAX_COMPUTE_UNITS:          8
  CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS:   3
  CL_DEVICE_MAX_WORK_ITEM_SIZES:        128 / 128 / 128
  CL_DEVICE_MAX_WORK_GROUP_SIZE:        128
  CL_DEVICE_MAX_CLOCK_FREQUENCY:        750 MHz
  CL_DEVICE_ADDRESS_BITS:               32
  CL_DEVICE_MAX_MEM_ALLOC_SIZE:         128 MByte
  CL_DEVICE_GLOBAL_MEM_SIZE:            512 MByte
  CL_DEVICE_ERROR_CORRECTION_SUPPORT:   no
  CL_DEVICE_LOCAL_MEM_TYPE:             global
  CL_DEVICE_LOCAL_MEM_SIZE:             16 KByte
  CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE:   64 KByte
  CL_DEVICE_QUEUE_PROPERTIES:           CL_QUEUE_PROFILING_ENABLE
  CL_DEVICE_IMAGE_SUPPORT:              0
  CL_DEVICE_MAX_READ_IMAGE_ARGS:        0
  CL_DEVICE_MAX_WRITE_IMAGE_ARGS:       0
  CL_DEVICE_SINGLE_FP_CONFIG:           INF-quietNaNs round-to-nearest round-to-
zero round-to-inf fma

  CL_DEVICE_IMAGE <dim>                 2D_MAX_WIDTH     0
                                        2D_MAX_HEIGHT    0
                                        3D_MAX_WIDTH     0
                                        3D_MAX_HEIGHT    0
                                        3D_MAX_DEPTH     0

  CL_DEVICE_EXTENSIONS:                 cl_khr_gl_sharing
                                        cl_amd_device_attribute_query

  CL_DEVICE_PREFERRED_VECTOR_WIDTH_<t>  CHAR 16, SHORT 8, INT 4, LONG 2, FLOAT 4
, DOUBLE 0


---------------------------------

...
...

oclDeviceQuery, Platform Name = AMD Accelerated Parallel Processing, Platform Ve
rsion = OpenCL 1.1 AMD-APP-SDK-v2.5 (793.1), SDK Revision = 7027912, NumDevs = 2
, Device = ATI RV730, Device =               Intel(R) Pentium(R) 4 CPU 2.66GHz

System Info:

Local Time/Date = 14:24:53, 12/6/2011
CPU Arch: 0
CPU Level: 15
# of CPU processors: 1
Windows Build: 2600
Windows Ver: 5.1


PASSED


Press <Enter> to Quit...
-----------------------------------------------------------
This AGP card support OpenCL

heinz