GeForce 9500 GT DDR2 vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which features GPU core speed of 900 MHz, and 512 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT DDR2		50 Watts
Radeon HD 6770		108 Watts
	Difference: 58 Watts (116%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 should be 320% quicker than the GeForce 9500 GT DDR2 overall, due to its greater bandwidth. (explain)

Radeon HD 6770		67200 MB/sec
GeForce 9500 GT DDR2		16000 MB/sec
	Difference: 51200 (320%)

Texel Rate

The Radeon HD 6770 will be quite a bit (more or less 309%) better at texture filtering than the GeForce 9500 GT DDR2. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 27200 (309%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6770 is a better choice, and very much so. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce 9500 GT DDR2		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 largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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