Radeon HD 4350 vs Radeon HD 5450

Intro

Compare all of that to the Radeon HD 5450, which has core clock speeds of 650 MHz on the GPU, and 800 MHz on the 512 MB of DDR3 RAM. It features 80(16x5) SPUs as well as 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
Radeon HD 4350		22 Watts
	Difference: 3 Watts (16%)

Memory Bandwidth

Performance-wise, the Radeon HD 5450 should in theory be quite a bit superior to the Radeon HD 4350 overall. (explain)

Radeon HD 5450		12800 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 4800 (60%)

Texel Rate

The Radeon HD 5450 will be just a bit (about 13%) more effective at anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 5450		5200 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 600 (13%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5450 is a better choice, but only just. (explain)

Radeon HD 5450		2600 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 300 (13%)

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 (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few 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.