Radeon HD 7950 3GB vs Radeon R9 280X

Intro

Compare that to the Radeon R9 280X, which comes with core speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

Zcash Mining Hash Rate

Radeon R9 280X		294 Sol/s
Radeon HD 7950 3GB		229 Sol/s
	Difference: 65 (28%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
Radeon R9 280X		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

The Radeon R9 280X should in theory be just a bit faster than the Radeon HD 7950 3GB overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 48000 (20%)

Texel Rate

The Radeon R9 280X is much (approximately 21%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 19200 (21%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 280X is a better choice, but only just. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 1600 (6%)

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 maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.