GeForce GT 315 vs Radeon HD 5450

Intro

Compare all that to the Radeon HD 5450, which features GPU core speed of 650 MHz, and 512 MB of DDR3 RAM running at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GT 315		52 Watts
	Difference: 33 Watts (174%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 315 should be 98% faster than the Radeon HD 5450 in general, because of its greater data rate. (explain)

GeForce GT 315		25280 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 12480 (98%)

Texel Rate

The GeForce GT 315 will be much (approximately 92%) better at texture filtering than the Radeon HD 5450. (explain)

GeForce GT 315		10000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 4800 (92%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 315 is superior to the Radeon HD 5450, by a large margin. (explain)

GeForce GT 315		5000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 2400 (92%)

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 data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 can be applied in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.