Radeon HD 7750 vs Radeon HD 7870 XT

Intro

Compare those specifications to the Radeon HD 7870 XT, which makes use of a 28 nm design. AMD has set the core speed at 925 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this particular card. It features 1536 SPUs along with 96 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 7870 XT		6390 points
Radeon HD 7750		2240 points
	Difference: 4150 (185%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 7870 XT		185 Watts
	Difference: 130 Watts (236%)

Memory Bandwidth

In theory, the Radeon HD 7870 XT should perform much faster than the Radeon HD 7750 overall. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 120000 (167%)

Texel Rate

The Radeon HD 7870 XT will be quite a bit (more or less 247%) better at AF than the Radeon HD 7750. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 63200 (247%)

Pixel Rate

The Radeon HD 7870 XT is much (approximately 131%) more effective at FSAA than the Radeon HD 7750, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7870 XT		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 data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.