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C-40 Sun Ultra 60 Service Manual • August 2001
PCI Cards
The PCI card power budget supports a total of 60 watts, which is distributed among
four PCI cards in an arbitrary way as long as the total PCI power does not exceed 60
watts.
TABLE C-11 lists the power estimate for the 5-Vdc PCI card and TABLE C-12 lists
the power estimate for the 3.3-Vdc PCI card.
TABLE C-10 300-MHz (3.3-ns) CPU Module(s) Power Estimate
Description Qty
2.5-Vdc Core
(amps)
3.3-Vdc System
(amps)
Watt
(max)
Watt
(max)
ea. sub ea. sub ea. sub
SRAM
(8 data +1 tag)
9 0.909 8.18 3.00 27.00
CPU module core + I/O 1 13.33 13.33 33.33 33.33
CPU module I/O 1 0.27 0.27 0.90 0.90
BDB
(@ 2.5 Vdc, EPIC 4)
2 1.04 2.08 2.6 5.20
CPU module 1 15.41 8.45 66.43
CPU module 1 15.41 8.45 66.43
TABLE C-11 PCI Card (5 Vdc) Power Estimate
Voltage Rail (Vdc)
PCI Cards
(Max No.)
Current each
(amps)
Current total
(amps)
Total Power
(W)
5 3 3.0 12.0
<= 60
3.3 1 0 0
+12 4 0.5 2.0
-12 4 0.1 0.4