Fahrenheit (microarchitecture) explained

Nvidia Fahrenheit
Created:	1998
D3dversion:	5.0 and 6.0
Successor:	Celsius
Process:	350 nm, 250nm
Openglversion:	1.0 and 1.2
Architecture:	Fahrenheit
Date:	1998-1999
Vulkanapi:	None
Support Status:	Unsupported

Fahrenheit is the codename for a GPU microarchitecture developed by Nvidia, and released in 1998, as the successor to STG-2000, Riva 128 (NV1, NV2, NV3...) microarchitecture. It was named with reference to Fahrenheit^[1] and used with STG-2000, Riva 128.

Graphics features

• DirectX 5.0 and 6.0^{[2] [3]}
• OpenGL 1.2
• Vertex shader

None

• Pixel shader

?

• Z-buffer 24 bits^[4]
• Up to 2048*2048 pixels texture size
• 32-bit (truecolor) pixel format (add since Riva TNT)
• AGP 4X support
• Bump Mapping in single cycle
• Up to 32MB video memory

GPU list

Model	Launch	Code name	Fab (nm)^[5]	Transistors (million)	Die size (mm^2)	Bus interface	Core clock (MHz)	Memory clock (MHz)	Core config	Fillrate				Memory				API support
										MOperations/s	MPixels/s	MTexels/s	MVertices/s	Size (MB)	Bandwidth (GB/s)	Bus type	Bus width (bit)	Direct3D	OpenGL
STG-2000	May 22, 1995	NV1	SGS 500 nm	1^[6]	90	PCI	12	75	1:1:1	12	12	12	0	2 4	0.6	EDO VRAM	64	1.0	n/a
Riva 128	August 25, 1997	NV3	SGS 350 nm	4^[7]	90	AGP 1x,^[8] PCI	100	100		100	100	100		4	1.6	SDR	128	5.0	1.0
Riva 128ZX	February 23, 1998		SGS/TSMC 350 nm			AGP 2x, PCI								8	1.6
Riva TNT	June 15, 1998	NV4	TSMC 350 nm	7^[9]	90		90	110	2:2:2	180	180	180		8 16	1.76			6.0	1.2
Vanta	March 22, 1999	NV6	TSMC 250 nm			AGP 4x, PCI	100	125		200	200	200		8 16	1		64
Vanta LT	March 2000					AGP 2x	80	100		160	160	160		8 16	0.8
Riva TNT2 M64	October 1999					AGP 4x, PCI	125	150		250	250	250		8 16 32	1.2
Riva TNT2	March 15, 1999	NV5		15^[10]	90									16 32	2.4		128
Riva TNT2 Pro	October 12, 1999		TSMC 220 nm				143	166		286	286	286		16 32	2.656
Riva TNT2 Ultra	March 15, 1999		TSMC 250 nm				150	183		300	300	300		16 32	2.928
Model	Launch	Code name	Fab (nm)	Transistors (million)	Die size (mm^2)	Bus interface	Core clock (MHz)	Memory clock (MHz)	Core config	MOperations/s	MPixels/s	MTexels/s	MVertices/s	Size (MB)	Bandwidth (GB/s)	Bus type	Bus width (bit)	Direct3D	OpenGL
										Fillrate				Memory				API support

See also

• List of Nvidia graphics processing units
• Scalable Link Interface (SLI)
• Celsius (microarchitecture)

Notes and References

1. Web site: TechPowerUp. 2021-02-21. TechPowerUp. en.
2. Web site: NVIDIA Riva TNT Specs. 2021-02-21. TechPowerUp. en.
3. Web site: NVIDIA Riva TNT2 Ultra Specs. 2021-02-21. TechPowerUp. en.
4. Web site: NVIDIA Riva TNT 2 (Preview) - HardWare.fr. 2021-02-21. www.hardware.fr.
5. Web site: 3D accelerator database . Vintage 3D . 21 July 2019 . https://web.archive.org/web/20181023222614/http://www.vintage3d.org/dbn.php . 23 October 2018 . live .
6. Web site: NVIDIA NV1 GPU Specs TechPowerUp GPU Database.
7. Web site: NVIDIA NV3 GPU Specs TechPowerUp GPU Database .
8. Web site: RIVA 128/ZX/TNT FAQ . June 15, 2018 . https://web.archive.org/web/20180616103247/http://www.nvidia.com/object/RIVA_128_FAQ.html . June 16, 2018 . live .
9. Web site: NVIDIA NV4 GPU Specs TechPowerUp GPU Database.
10. Web site: NVIDIA NV5B GPU Specs TechPowerUp GPU Database.