Radeon HD 6450 (OEM) 1GB vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which uses a 28 nm design. AMD has set the core frequency at 1050 MHz. The GDDR5 memory runs at a speed of 1500 MHz on this card. It features 2816 SPUs along with 176 Texture Address Units and 64 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 390X 8G		275 Watts
	Difference: 244 Watts (787%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G will be 1233% faster than the Radeon HD 6450 (OEM) 1GB in general, because of its higher data rate. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 355200 (1233%)

Texel Rate

The Radeon R9 390X 8G should be a lot (approximately 2980%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 178800 (2980%)

Pixel Rate

The Radeon R9 390X 8G is a lot (approximately 2140%) better at anti-aliasing than the Radeon HD 6450 (OEM) 1GB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 64200 (2140%)

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 (in units of MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.