Radeon HD 7790 vs Radeon R9 280X

Intro

Compare those specs to the Radeon R9 280X, which features GPU core speed of 850 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, 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.

3DMark Fire Strike Graphics Score

Radeon R9 280X		8886 points
Radeon HD 7790		4330 points
	Difference: 4556 (105%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 280X		250 Watts
	Difference: 165 Watts (194%)

Memory Bandwidth

Performance-wise, the Radeon R9 280X should theoretically be a lot better than the Radeon HD 7790 in general. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 192000 (200%)

Texel Rate

The Radeon R9 280X will be a lot (about 94%) better at AF than the Radeon HD 7790. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 52800 (94%)

Pixel Rate

The Radeon R9 280X is a lot (approximately 70%) more effective at FSAA than the Radeon HD 7790, and also capable of handling higher resolutions better. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 11200 (70%)

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 max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 ability to reach the max fill rate.