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

Intro

Compare all that to the Radeon R9 280X, which comes with GPU core speed of 850 MHz, and 3072 MB of GDDR5 RAM set to run at 1500 MHz through a 384-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, 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

The Radeon R9 280X should theoretically perform much faster than the Radeon HD 6450 (OEM) 1GB in general. (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 (more or less 1713%) more effective at AF 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 high levels of AA 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 MB per second) that can be transported past 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 type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.