GeForce 8800 GTS (G92) vs Radeon HD 4770

Intro

Compare all of that to the Radeon HD 4770, which makes use of a 40 nm design. ATi has clocked the core frequency at 750 MHz. The GDDR5 memory is set to run at a frequency of 800 MHz on this model. It features 640(128x5) SPUs along with 32 TAUs and 16 Rasterization Operator Units.

F.E.A.R. 2

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

Radeon HD 4770		54 FPS
GeForce 8800 GTS (G92)		42 FPS
	Difference: 12 FPS (29%)

Fallout 3

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

GeForce 8800 GTS (G92)		36 FPS
Radeon HD 4770		36 FPS
	Difference: 0 FPS (0%)

Fallout 3

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

GeForce 8800 GTS (G92)		59 FPS
Radeon HD 4770		49 FPS
	Difference: 10 FPS (20%)

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)

Radeon HD 4770		49 FPS
GeForce 8800 GTS (G92)		45 FPS
	Difference: 4 FPS (9%)

Left4Dead

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

Radeon HD 4770		48 FPS
GeForce 8800 GTS (G92)		40 FPS
	Difference: 8 FPS (20%)

Left4Dead

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

Radeon HD 4770		52 FPS
GeForce 8800 GTS (G92)		51 FPS
	Difference: 1 FPS (2%)

Tom Clancy's Endwar

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

Radeon HD 4770		20 FPS
GeForce 8800 GTS (G92)		17 FPS
	Difference: 3 FPS (18%)

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 GTS (G92)		35 FPS
Radeon HD 4770		29 FPS
	Difference: 6 FPS (21%)

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Radeon HD 4770 wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the Radeon HD 4770 wins overall, by 12 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.

Radeon HD 4770		337 FPS
GeForce 8800 GTS (G92)		325 FPS
	Difference: 12 FPS (4%)

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce 8800 GTS (G92)		135 Watts
	Difference: 55 Watts (69%)

Memory Bandwidth

As far as performance goes, the GeForce 8800 GTS (G92) should theoretically be quite a bit better than the Radeon HD 4770 in general. (explain)

GeForce 8800 GTS (G92)		62080 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 10880 (21%)

Texel Rate

The GeForce 8800 GTS (G92) should be quite a bit (more or less 73%) more effective at anisotropic filtering than the Radeon HD 4770. (explain)

GeForce 8800 GTS (G92)		41600 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 17600 (73%)

Pixel Rate

The Radeon HD 4770 will be a little bit (more or less 15%) better at full screen anti-aliasing than the GeForce 8800 GTS (G92), and also should be capable of handling higher resolutions better. (explain)

Radeon HD 4770		12000 Mpixels/sec
GeForce 8800 GTS (G92)		10400 Mpixels/sec
	Difference: 1600 (15%)

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: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.