Radeon HD 6450 (OEM) 1GB vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which comes with a core clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It features 1792 SPUs, 112 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 380 4G		190 Watts
	Difference: 159 Watts (513%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should perform quite a bit faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 153600 (533%)

Texel Rate

The Radeon R9 380 4G is a lot (more or less 1711%) faster with regards to AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 102640 (1711%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 380 4G is a better choice, by far. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 28040 (935%)

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 max amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 in one second. This is worked out by multiplying the total number of texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.