GeForce GTS 450 vs Radeon HD 5450

Intro

Compare all that to the Radeon HD 5450, which features a core clock frequency of 650 MHz and a DDR3 memory speed of 800 MHz. It also features a 64-bit bus, and makes use of a 40 nm design. It features 80(16x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GTS 450		106 Watts
	Difference: 87 Watts (458%)

Memory Bandwidth

In theory, the GeForce GTS 450 should be 351% faster than the Radeon HD 5450 overall, due to its higher data rate. (explain)

GeForce GTS 450		57728 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 44928 (351%)

Texel Rate

The GeForce GTS 450 should be quite a bit (about 382%) more effective at AF than the Radeon HD 5450. (explain)

GeForce GTS 450		25056 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 19856 (382%)

Pixel Rate

The GeForce GTS 450 will be much (approximately 382%) more effective at anti-aliasing than the Radeon HD 5450, and able to handle higher resolutions while still performing well. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 9928 (382%)

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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.