Radeon HD 7750 vs Radeon R9 280X

Intro

Compare all of that to the Radeon R9 280X, which features GPU core speed of 850 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 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 7750		2240 points
	Difference: 6646 (297%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon R9 280X		250 Watts
	Difference: 195 Watts (355%)

Memory Bandwidth

In theory, the Radeon R9 280X should be 300% faster than the Radeon HD 7750 overall, because of its higher bandwidth. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 216000 (300%)

Texel Rate

The Radeon R9 280X should be much (about 325%) more effective at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 83200 (325%)

Pixel Rate

The Radeon R9 280X should be quite a bit (more or less 113%) better at full screen anti-aliasing than the Radeon HD 7750, and also should be able to handle higher resolutions more effectively. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 14400 (113%)

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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video 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 most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.