4/26/17: Nvidia updated card design with faster VRAM...which led to new SKUs typically with PLUS in the name. Minimal upgrade in gaming framerates.
GTX 1060 6GB - In brief: Great 1080p/decent 1440p, 120W TDP, but OEM stock OC'ed cards will use 125-135W at stress loads. HDMI 2.0b and Display Port 1.4(ready), DVI no longer includes analog VGA signals. Requires one 6-pin PCIe Graphics power connector, but OEM designs may use more. Dimensions stated as: a" x b" x c" are from mfgr websites - others are from reviews. Similar in performance to GTX 980, slightly faster than Radeon RX 480. No SLI bridge.
GTX 1060 3GB - In brief: Great 1080p/ok 1440p*, 120W TDP, but OEM stock OC'ed cards will use 125-135W at stress loads. *If you play games with high textures / texture packs, check the memory usage - you may want to get the 6GB card.
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GTX 1060 6GB reviews:
Nvidia reference design @ Techpowerup, TweakPC (german), HT4U (german)
Roundups:
ComputerBase (German)
Tom's Hardware
Reviews with acoustic testing:
MSI GTX 1060 GAMING X 6GB(10.98-11.02" length, 5.51" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to 48C; fans on with rise to 60C.
Techpowerup
eTeknix
Gamers Nexus
Guru3D
Computer Base (German)
KitGuru
hardwareLUXX (German)
MSI GTX 1060 GAMING X PLUS 6GB(10.98-11.02" length, 5.51" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to 48C; fans on with rise to 60C.
Guru3D
MSI GTX 1060 GAMING OC 6GB(9.5" length, xx" height, dual slot (xx"), 6-pin PEG. 1 DP, 1 HDMI, 1 Dual-link DVI). Not passive under low load.
Techpowerup (wrong dimensions in review)
Guru3D
MSI GTX 1060 Aero ITX 6GB(6.69" length, xx" height, dual slot (xx"), 6-pin PEG. 1 DP, 1 HDMI, 1 Dual-link DVI). Passive under load to 60C.
Guru3D
MSI GTX 1060 Armor OC 6GB(11.02" length, 5.51" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive under load to 60C.
Techpowerup
Asus ROG Strix GeForce GTX 1060 OC 6GB (11.73-11.81" length, 5.12-5.28" height, 2.1 slot (1.57"), 8-pin PEG. 2 DP, 2 HDMI, 1 Dual-link DVI). Passive to 57C.
Hexus
KitGuru
hardwareLUXX
Techpowerup
ComputerBase (German)
Asus GeForce GTX 1060 OC 9Gbps 6GB (8.46" length, 4.92" height, 2 slot (xx"), 6-pin PEG. 2 DP, 2 HDMI, 1 Dual-link DVI). Passive to xxC.
ComputerBase
Hexus
Palit GTX 1060 Super Jetstream 6GB[/color](9.6-9.84" length, 4.72-4.84" height, 2.5 slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to 50C; fans on with rise to 60C.
Guru3D
Computer Base
Hexus
Techpowerup
Gigabyte GTX 1060 G1 Gaming 6GB(11-11.26" length, 4.53" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to 53C. 150W Power target.
hardwareLUXX
Guru3D
ComputerBase (German)
Gigabyte GTX 1060 Xtreme Gaming 6GB(11.02" length, 5.31" height, three slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to 60C. xxW Power target.
Techpowerup
Inno3D iChill GTX 1060 X3 6GB(11.81-11.89" length, 4.92" height, 2.5 slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to 55C.
hardwareLUXX
Hexus
ComputerBase (German)
Inno3D iChill GTX 1060 Gaming OC 6GB(10.91" length, xx" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to 53C.
hardwareLUXX
Zotac GTX 1060 AMP! Edition 6GB(8.27" length, 4.92" height, dual slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to 47-58C.
hardwareLUXX
ComputerBase (German)
EVGA GTX 1060 SC Gaming 6GB(6.81-7.09" length, xx" height, dual slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive to xxC.
hardwareLUXX
Hexus
EVGA GTX 1060 FTW + Gaming 6GB(10.47" length, xx" height, dual slot (xx"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to 51C; fans on with rise to xxC.
hardwareLUXX
EVGA GTX 1060 6GB(6.89" length, 4.33" height, dual slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). No passive fans.
ComputerBase
Gainward GTX 1060 / Palit GTX 1060 Dual 6GB(9.84" length, 4.33" height, dual slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive fan hysteresis: fans off with drop to xxC; fans on with rise to xxC.
ComputerBase
KFA2 GTX 1060 OC 6GB(9.25" length, 4.33" height, dual slot (xx"), 6-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). No passive fans.
ComputerBase
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GTX 1060 3GB Reviews:
MSI GTX 1060 GAMING X 3GB(10.91-11.02" length, 5.51" height, dual slot (1.54"), 8-pin PEG. 3 DP, 1 HDMI, 1 Dual-link DVI). Passive to 60C.
Guru3D
Techpowerup
Hexus
Asus GTX 1060 Dual OC 3GB(9.45" length, 5.12" height, 2.5 slot (xx"), 6-pin PEG. 2 DP, 2 HDMI, 1 Dual-link DVI). 1000rpm fans at idle.
ComputerBase
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Well, Steve: please hijack this post/thread and keep up your usual very good work!

Ok, it's officially hijacked. (Steve)