GeForce 9800 GT 512MB vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
Radeon HD 5770		108 Watts
	Difference: 3 Watts (3%)

Memory Bandwidth

Performance-wise, the Radeon HD 5770 should in theory be much better than the GeForce 9800 GT 512MB overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 19200 (33%)

Texel Rate

The Radeon HD 5770 will be a small bit (about 1%) faster with regards to anisotropic filtering than the GeForce 9800 GT 512MB. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 400 (1%)

Pixel Rate

The Radeon HD 5770 will be much (approximately 42%) more effective at FSAA than the GeForce 9800 GT 512MB, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 4000 (42%)

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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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