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 anarbitrary way as long as the total PCI power does not exceed 60

watts. TABLEC-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.

TABLEC-10 300-MHz (3.3-ns) CPU Module(s) Power Estimate
Description Qty 2.5-VdcCore
(amps) 3.3-VdcSystem
(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 moduleI/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
TABLEC-11 PCI Card (5 Vdc) Power Estimate
VoltageRail (Vdc) PCICards
(MaxNo.) Currenteach
(amps) Currenttotal
(amps) TotalPower
(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