MacPro Temps OK?

Have seen several discussions in the Apple Support communities on high temps causing problems.

These Fahrenheit temps were taken at 'idle' with "Temperature Monitor" App v 4.96, on my MacPro 1,1 - Mac OS X (10.6.8), 8 MgRam,1-120G SSD,1-500G,1-Ext250G.

Am wondering if my idle temps are OK, or do I need to do some dust cleaning? Am not a gamer, video, graphics, or audio power user. Mostly Excel, Word, Web, and email.

75℉

Ambient Air

93℉

CPU A Heatsink

100℉

CPU A Proximity

91℉

CPU B Heatsink

97℉

Expansion Slots

81℉

Hard Drive Bay 1

82℉

Hard Drive Bay 2

81℉

Hard Drive Bay 3

82℉

Hard Drive Bay 4

111℉

Memory Bank A Point 1

131℉

Memory Bank A Point 2

120℉

Memory Bank A Point 3

108℉

Memory Bank B Point 1

124℉

Memory Bank B Point 2

129℉

Memory Bank B Point 3

172℉

Memory Module A1

176℉

Memory Module A2

158℉

Memory Module A3

140℉

Memory Module A4

160℉

Memory Module B1

174℉

Memory Module B2

158℉

Memory Module B3

149℉

Memory Module B4

176℉

Northbridge Heat Sink

118℉

Power Supply Location 1

115℉

Power Supply Location 2

99℉

SMART Disk Hitachi HDS725050KLA360 (KRVN27ZAKE8LNH)

86℉

SMART Disk OWC Mercury Electra 3G SSD (EX3G2012E22K7159)

91℉

CPU Core 1

88℉

CPU Core 2

84℉

CPU Core 3

84℉

CPU Core 4