GeForce GTS 450 vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 128-bit bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
Radeon HD 5770		108 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

Performance-wise, the Radeon HD 5770 should in theory be a lot better than the GeForce GTS 450 overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 19072 (33%)

Texel Rate

The Radeon HD 5770 should be a lot (about 36%) faster with regards to texture filtering than the GeForce GTS 450. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 8944 (36%)

Pixel Rate

The Radeon HD 5770 is a little bit (approximately 9%) more effective at anti-aliasing than the GeForce GTS 450, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 1072 (9%)

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 megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 are applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.