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

Intro

Compare those specs to the Radeon R9 390X 8G, which makes use of a 28 nm design. AMD has clocked the core frequency at 1050 MHz. The GDDR5 RAM works at a speed of 1500 MHz on this model. It features 2816 SPUs as well as 176 TAUs 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

Performance-wise, the Radeon R9 390X 8G should theoretically be much better than the Radeon HD 6450 (OEM) 1GB in general. (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 much (about 2980%) better at texture 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

If running with high levels of AA is important to you, then the Radeon R9 390X 8G is a better choice, and very much so. (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: Bandwidth is the largest amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.