Radeon HD 7750 vs Radeon HD 7970

Intro

Compare all that to the Radeon HD 7970, which uses a 28 nm design. AMD has set the core speed at 925 MHz. The GDDR5 RAM works at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

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 HD 7970		8225 points
Radeon HD 7750		2240 points
	Difference: 5985 (267%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 7970		250 Watts
	Difference: 195 Watts (355%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should theoretically be quite a bit better than the Radeon HD 7750 overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 192000 (267%)

Texel Rate

The Radeon HD 7970 will be a lot (approximately 363%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 92800 (363%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7970 is superior to the Radeon HD 7750, by a large margin. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 16800 (131%)

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 information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write 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 core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.