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GeForce 8800 GTX vs Radeon HD 5750 1GB

Intro

The GeForce 8800 GTX comes with a GPU core clock speed of 575 MHz, and the 768 MB of GDDR3 memory is set to run at 900 MHz through a 384-bit bus. It also is comprised of 128 Stream Processors, 64 Texture Address Units, and 24 ROPs.

Compare those specifications to the Radeon HD 5750 1GB, which features a clock frequency of 700 MHz and a GDDR5 memory speed of 1150 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is made up of 720(144x5) SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
GeForce 8800 GTX		155 Watts
	Difference: 69 Watts (80%)

Memory Bandwidth

The GeForce 8800 GTX, in theory, should be a little bit faster than the Radeon HD 5750 1GB in general. (explain)

GeForce 8800 GTX		86400 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 12800 (17%)

Texel Rate

The GeForce 8800 GTX is quite a bit (about 46%) more effective at AF than the Radeon HD 5750 1GB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 11600 (46%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 8800 GTX is superior to the Radeon HD 5750 1GB, and very much so. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 2600 (23%)

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

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GeForce 8800 GTX

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Radeon HD 5750 1GB

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	GeForce 8800 GTX	Radeon HD 5750 1GB
Manufacturer	nVidia	AMD
Year	Nov 2006	October 13, 2009
Code Name	G80	Juniper LE
Memory	768 MB	1024 MB
Core Speed	575 MHz	700 MHz
Memory Speed	1800 MHz	4600 MHz
Power (Max TDP)	155 watts	86 watts
Bandwidth	86400 MB/sec	73600 MB/sec
Texel Rate	36800 Mtexels/sec	25200 Mtexels/sec
Pixel Rate	13800 Mpixels/sec	11200 Mpixels/sec
Unified Shaders	128	720(144x5)
Texture Mapping Units	64	36
Render Output Units	24	16
Bus Type	GDDR3	GDDR5
Bus Width	384-bit	128-bit
Fab Process	90 nm	40 nm
Transistors	681 million	1040 million
Bus	PCIe x16	PCIe 2.1 x16
DirectX Version	DirectX 10	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 3.2

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

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