GPU tests - 2008 Mac Pro versus previous Mac towers

Mac Pro - Wikipedia

Mac Pro Available to Order, Shipping in February 2014 - TidBITS

Early 2008 2nd Gen Apple Mac Pro nVidia GF 8800GT 512MB Video Card DOUBLE SLOT

Mac Pro - Wikipedia

Mac Pro M2 review - Maybe a true modular Mac will come in a few more years - macOS Discussions on AppleInsider Forums

Sonoma runs great on my 2008 MacBook Pro : r/mac

The Definitive Classic Mac Pro (2006-2012) Upgrade Guide

The Definitive Classic Mac Pro (2006-2012) Upgrade Guide

Mac Pro GPUs by Era

Mac Pro Quad Core 2.8 (2008) Specs (Early 2008, BTO/CTO, MacPro3,1, A1186, 2180)