User guide

User Guide CC8-BLUES • Multi-Processing CompactPCI CPU
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. +49 (0)2381/6890-0 • Fax. +49 (0)2381/6890-90 • E-Mail info@ekf.de • Internet http://www.ekf.de
The table below shows the effect of several throttle mode settings on the processor temperature
in a given system equipped with the CC8-BLUES, now provided with a 566MHz Celeron
processor. Again, the airflow around the CC8 cards slot is about 16m
3
/h, which is typical for EKF
systems, and as before, while the testing procedure, the CPU is stressed to its maximum by
running kpower.exe.
Ambient
Temperature
o
C
Climate
Chamber
Throttle Mode (Celeron-566)
o
C
0% (100% duty) 25% 50% 87.5%
Board Die Board Die Board Die Board Die
40 48 66 48 62 46 56 42 43
45 56 74 54 69 51 61 48 49
50 61 80 59 74 57 67 52 53
55 66 85 64 78 62 72 58 59
60 71 90 69 83 67 77 63 64
65 76 97 74 88 72 82 68 69
70 82 104 81 97 77 87 72 74
75 88 109 86 101 82 92 78 80
80 94 117 92 109 87 98 84 85
85 98 121 96 115 93 104 88 90
90 1) 1) 103 121 98 110 94 95
95 1) 1) 103 115 99 99
100 108 121 104 106
1) System not operational anymore
The maximum allowed die temperature of the Celeron-566 can be derived as 90
o
C. The test
system can be operated up to 60
o
C ambient temperature at 0% throttle mode (which is 100%
duty cycle), and up to 85
o
C at 87.5% throttle mode. However, the processor under test did
remain fully functional up to ~120
o
C die temperature. Under typical conditions (not executing
kpower.exe), the heat dissipation of the CPU would be remarkable lower, thus increasing the
maximum ambient temperature of the CC8-BLUES.