Radeon HD 5450 vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which uses a 28 nm design. AMD has set the core frequency at 730 MHz. The DDR3 memory works at a frequency of 900 MHz on this particular card. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon R7 240		30 Watts
	Difference: 11 Watts (58%)

Memory Bandwidth

In theory, the Radeon R7 240 should be 125% faster than the Radeon HD 5450 in general, because of its higher bandwidth. (explain)

Radeon R7 240		28800 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon R7 240 should be quite a bit (about 181%) more effective at AF than the Radeon HD 5450. (explain)

Radeon R7 240		14600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 9400 (181%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R7 240 is superior to the Radeon HD 5450, by far. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 3240 (125%)

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 max amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 can be processed in one second. This number is worked out by multiplying the total number of texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.