Graphics Processor

GPU Name:	G80
Process Size:	90 nm
Transistors:	681 million
Die Size:	484 mm²

Graphics Card

Released:	~~Nov 8th, 2006~~ Dec 23rd, 2006
Production Status:	End-of-life
Bus Interface:	PCIe 1.0 x16
SPARKLE Part #:	Calibre-P880+

Clock Speeds

GPU Clock:	~~576 MHz~~ 630 MHz (+9%)
Shader Clock:	1350 MHz
Memory Clock:	~~900 MHz~~ 980 MHz (+9%) ~~1800 MHz effective~~ 1960 MHz effective

Memory

Memory Size:	768 MB
Memory Type:	GDDR3
Memory Bus:	384 bit
Bandwidth:	~~86.4 GB/s~~ 94.1 GB/s

Render Config

Shading Units:	128
TMUs:	32
ROPs:	24
SM Count:	8
Pixel Rate:	~~13.8 GPixel/s~~ 15.1 GPixel/s
Texture Rate:	~~18.4 GTexel/s~~ 20.2 GTexel/s
Floating-point performance:	345.6 GFLOPS

Reference Board

Slot Width:	Dual-slot
Length:	10.63 inches 270 mm
TDP:	155 W
Outputs:	2x DVI 1x S-Video

Graphics Features

DirectX:	10.0
OpenGL:	3.3
OpenCL:	n/a
Shader Model:	4.0

VGA BIOS

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GPU-Z Validation

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Reviews

Our review database contains 73 reviews of the Calibre 8800 GTX.

Card Notes

518.4 GFLOPs when Multiply Operation is available.

SFUs: 16

G80 GPU Notes

G80-300-A2 8800 GTX

G200-300-A2

Each Streaming Multiprocessor(SM) in the chip architecture contains 8 SPs and 2 SFUs.

Each SP can fulfill up to two single precision operations MAD per clock.

Each SFU can fulfill up to four operations SF per clock (these units can also handle single-precision floating-point multiplications per clock).

The approximate ratio of operations MAD to operations SF is equal 2:1.

The theoretical SP + SFU performance in single-precision floating point operations [FLOPSsp + sfu, GFLOPS] of the graphics card with shader count [n] and shader frequency [f, GHz], is estimated by the following formula: FLOPSsp+sfu ≈ f × n × 3.

Alternative formula: FLOPSsp+sfu ≈ f × m × ( 8 SPs * 2 (MAD) + 4 * 2 SFUs ). [m] - SM count.

SP - Shader Processor (Unified Shader, CUDA Core)
SFU - Special Function Unit
SM - Streaming Multiprocessor
MAD - ADD+MUL

Other retail boards based on this design

Name	GPU Clock	Memory Clock	Other Changes
ASUS 8800 GTX AquaTank	630 MHz	1030 MHz	Triple-slot
EVGA 8800 GTX	630 MHz	980 MHz
EVGA 8800 GTX ACS³	630 MHz	980 MHz
EVGA 8800 GTX KO ACS³	626 MHz	1000 MHz
EVGA 8800 GTX Superclocked	621 MHz	1000 MHz
EVGA 8800 GTX Superclocked v2	621 MHz	1000 MHz
EVGA 8800 GTX v2	630 MHz	980 MHz
Foxconn 8800 GTX OC	650 MHz	1000 MHz
OCZ 8800 GTX	630 MHz	980 MHz
SPARKLE Calibre 8800 GTX	630 MHz	980 MHz
XFX 8800 GTX	630 MHz	980 MHz
XFX 8800 GTX Extreme	600 MHz	950 MHz
XFX 8800 GTX Premium	630 MHz	1030 MHz
XFX 8800 GTX XXX	630 MHz	1000 MHz
ZOTAC 8800 GTX AMP! Edition	630 MHz	1000 MHz

SPARKLE Calibre 8800 GTX