GeForce 8800 GT 512MB vs GeForce 8800 GTS (G80) 640MB

Intro

Compare that to the GeForce 8800 GTS (G80) 640MB, which makes use of a 90 nm design. nVidia has clocked the core frequency at 513 MHz. The GDDR3 memory runs at a speed of 792 MHz on this particular model. It features 96 SPUs as well as 48 Texture Address Units and 20 ROPs.

F.E.A.R. 2

Settings:	Maximum Quality
AA:	4x
AF:	8x
Resolution:	1920x1200
Test Machine:	Unknown (Source)

GeForce 8800 GT 512MB		38 FPS
GeForce 8800 GTS (G80) 640MB		30 FPS
	Difference: 8 FPS (27%)

Fallout 3

Settings:	Very High Quality
AA:	8x
AF:	16x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

GeForce 8800 GT 512MB		33 FPS
GeForce 8800 GTS (G80) 640MB		14 FPS
	Difference: 19 FPS (136%)

Fallout 3

Settings:	Very High Quality
AA:	4x
AF:	8x
Resolution:	1680x1050
Test Machine:	Tom's Hardware Charts Test Rig (Source)

GeForce 8800 GT 512MB		55 FPS
GeForce 8800 GTS (G80) 640MB		38 FPS
	Difference: 17 FPS (45%)

Far Cry 2

Settings:	Very High Qualty
AA:	none
AF:	none
Resolution:	1920x1200
Test Machine:	Intel Core i7-920,3 x 2 GB Ram,Windows Vista Ultimate 32 Bit SP1 (Source)

GeForce 8800 GT 512MB		41 FPS
GeForce 8800 GTS (G80) 640MB		31 FPS
	Difference: 10 FPS (32%)

Left4Dead

Settings:	Very High Quality
AA:	8x
AF:	16x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

GeForce 8800 GT 512MB		37 FPS
GeForce 8800 GTS (G80) 640MB		32 FPS
	Difference: 5 FPS (16%)

Left4Dead

Settings:	Very High Quality
AA:	4x
AF:	8x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Charts Test Rig (Source)

GeForce 8800 GT 512MB		46 FPS
GeForce 8800 GTS (G80) 640MB		38 FPS
	Difference: 8 FPS (21%)

Tom Clancy's Endwar

Settings:	High Quality
AA:	4x
AF:	8x
Resolution:	1920x1200
Test Machine:	Tom's Hardware Test Machine (Source)

GeForce 8800 GT 512MB		16 FPS
GeForce 8800 GTS (G80) 640MB		14 FPS
	Difference: 2 FPS (14%)

Tom Clancy's H.A.W.X

Settings:	High Quality
AA:	4x
AF:	8x
Resolution:	1680x1050
Test Machine:	Tom's Hardware Charts Test Rig (Source)

GeForce 8800 GT 512MB		32 FPS
GeForce 8800 GTS (G80) 640MB		30 FPS
	Difference: 2 FPS (7%)

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GeForce 8800 GT 512MB wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the GeForce 8800 GT 512MB wins overall, by 71 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

GeForce 8800 GT 512MB		298 FPS
GeForce 8800 GTS (G80) 640MB		227 FPS
	Difference: 71 FPS (31%)

---

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB		105 Watts
GeForce 8800 GTS (G80) 640MB		143 Watts
	Difference: 38 Watts (36%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 640MB, in theory, should be just a bit faster than the GeForce 8800 GT 512MB overall. (explain)

GeForce 8800 GTS (G80) 640MB		63360 MB/sec
GeForce 8800 GT 512MB		57600 MB/sec
	Difference: 5760 (10%)

Texel Rate

The GeForce 8800 GT 512MB will be much (approximately 36%) better at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
	Difference: 8976 (36%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB will be a small bit (more or less 7%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GTS (G80) 640MB		10260 Mpixels/sec
GeForce 8800 GT 512MB		9600 Mpixels/sec
	Difference: 660 (7%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Comments

One Response to “GeForce 8800 GT 512MB vs GeForce 8800 GTS (G80) 640MB”

Bisk8 says:

September 1, 2011 at 12:03 pm

Exelente trabalho, parabéns!

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