Radeon HD 7870 vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which comes with a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 384 SPUs, 24 TAUs, and 8 Raster Operation 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		6230 points
Radeon R7 250		1836 points
	Difference: 4394 (239%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 7870		175 Watts
	Difference: 110 Watts (169%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7870 should theoretically be quite a bit better than the Radeon R7 250 overall. (explain)

Radeon HD 7870		153600 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 80000 (109%)

Texel Rate

The Radeon HD 7870 is a lot (approximately 233%) faster with regards to anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 56000 (233%)

Pixel Rate

The Radeon HD 7870 is quite a bit (approximately 300%) more effective at anti-aliasing than the Radeon R7 250, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 24000 (300%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR 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 amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.