Radeon HD 6450 (OEM) 1GB vs Radeon R9 280X

Intro

Compare that to the Radeon R9 280X, which makes use of a 28 nm design. AMD has set the core speed at 850 MHz. The GDDR5 RAM is set to run at a frequency of 1500 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon R9 280X		250 Watts
	Difference: 219 Watts (706%)

Memory Bandwidth

In theory, the Radeon R9 280X should perform quite a bit faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 259200 (900%)

Texel Rate

The Radeon R9 280X should be quite a bit (approximately 1713%) more effective at texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 102800 (1713%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 280X is superior to the Radeon HD 6450 (OEM) 1GB, by a large margin. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 24200 (807%)

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 information (measured in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.