GeForce 9500 GT 1GB GDDR3 vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which features a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT 1GB GDDR3		50 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 58 Watts (116%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 1GB should theoretically be much superior to the GeForce 9500 GT 1GB GDDR3 overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 9500 GT 1GB GDDR3		25600 MB/sec
	Difference: 41600 (163%)

Texel Rate

The Radeon HD 6770 1GB should be quite a bit (about 309%) faster with regards to anisotropic filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 27200 (309%)

Pixel Rate

The Radeon HD 6770 1GB will be much (about 227%) faster with regards to anti-aliasing than the GeForce 9500 GT 1GB GDDR3, and also able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
	Difference: 10000 (227%)

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 max amount of data (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at 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 the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.