GeForce GTX 275 vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which comes with GPU clock speed of 850 MHz, and 1024 MB of GDDR5 RAM set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, 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 275		219 Watts
	Difference: 111 Watts (103%)

Memory Bandwidth

Theoretically, the GeForce GTX 275 should be a lot faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 50208 (65%)

Texel Rate

The GeForce GTX 275 is much (more or less 49%) better at anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 16640 (49%)

Pixel Rate

The GeForce GTX 275 will be quite a bit (approximately 30%) better at anti-aliasing than the Radeon HD 5770, and also will be able to handle higher screen resolutions better. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 4124 (30%)

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

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied 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 one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.