GPUReview
GPUReview - Video Card Comparison

GPUBoss
GPUBoss - Graphics Card Comparisons

GeForce - Compare and Buy GPUs

Pangoly - List of Graphics Cards with 150 W TDP

MaximumPC - From Voodoo to GeForce: The Awesome History of 3D Graphics via Slashdot - A History of 3D Cards From Voodoo To GeForce

Tom's Hardware - Are those stains normal on a gpu's back? “Exactly, residue. Some manufacturers like ASUS usually washes the residue (flux, coatings) after the final product is done, some manufacturers like Gigabyte are notorious for large blobs of flux still present in the final product (don't know about their current crops).”

By PixelPipes on YouTube:

• Voodoo5 5500 vs Rage Fury MAXX | Card Battles
• The Notorious Rage Fury MAXX
• The Unloved Voodoo Banshee
• PowerVR Kyro Series: Better than it really should be
• Playing with the PowerVR Kyro 64MB

TweakGuides.com - ATI Catalyst Tweak Guide