GeForce GTX 260 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which has GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 260		182 Watts
	Difference: 74 Watts (69%)

Memory Bandwidth

In theory, the GeForce GTX 260 will be 46% quicker than the Radeon HD 5770 in general, because of its greater data rate. (explain)

GeForce GTX 260		111888 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 35088 (46%)

Texel Rate

The GeForce GTX 260 should be a small bit (approximately 8%) better at texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 2864 (8%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 260 is a better choice, though only just barely. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 2528 (19%)

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 (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.