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What are the different GPU readings?

Feb 7, 2009
620 (0.19/day)
Michigan, USA
System Name Black Box
Processor Intel i7 3770K
Motherboard AsRock z77 Extreme 6
Cooling Thermalright Venemous X
Memory 2 x 8GB Crucial Ballistix
Video Card(s) 2 x GTX 480
Storage A-Data 128GB SSD, Samsung Spinpoint F3 1TB
Display(s) HANNspree 25" 1080p 2ms
Case Lian Li PC-9F
Audio Device(s) Creative XFI
Power Supply PC Power & Cooling Silencer MKII 750w
Software Win 7 pro x64
Hey guys, I'm trying to diag a video card and so of course I've been using GPUz to monitor and create a log. However, I'm not really sure what all the different GPU# temps are.
I figure GPU#1 is core temp, but what is GPU#2 and #3?

For what it's worth I'm trying to diag a 5870.