This video card works well in Trisquel 5.0 with the "nouveau" driver and with 3D acceleration.

lspci -vmmnn

Slot:	01:00.0
Class:	VGA compatible controller [0300]
Vendor:	NVIDIA Corporation [10de]
Device:	G86 [GeForce 8500 GT] [0421]
SVendor:	ASUSTeK Computer Inc. [1043]
SDevice:	Device [824e]
Rev:	a1

lspci -nnk

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation G86 [GeForce 8500 GT] [10de:0421] (rev a1)
	Subsystem: ASUSTeK Computer Inc. Device [1043:824e]
	Kernel driver in use: nouveau
	Kernel modules: nouveau, nvidiafb

Note:

The brand of this video card is XFX, and they make 2 differents models of this card. One with 512MB of memory ( DDR 2 ) and other one ( the one i have ) with 1GB of memory ( DDR2 ) with "Turbo-Cache" technology.

This is the hardware setup that I used to make the test (RetroG):

Motherboard: ASROCK Wolfdale1333-D667.

CPU: Intel Core 2 Duo E7200 2,53GHZ.

RAM: Kingston 2GB (667 MHZ) DDR2.

HD: Western Digital 320GB SATAII.

Monitor: LG Flatron W1943SE 19" LCD.