Radeon HD 7870 vs Radeon R7 240

Intro

Compare all of that to the Radeon R7 240, which features a clock speed of 730 MHz and a DDR3 memory speed of 900 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It features 320 SPUs, 20 TAUs, and 8 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 HD 7870		6230 points
Radeon R7 240		1218 points
	Difference: 5012 (411%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 7870		175 Watts
	Difference: 145 Watts (483%)

Memory Bandwidth

In theory, the Radeon HD 7870 should perform a lot faster than the Radeon R7 240 overall. (explain)

Radeon HD 7870		153600 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 124800 (433%)

Texel Rate

The Radeon HD 7870 will be much (about 448%) faster with regards to anisotropic filtering than the Radeon R7 240. (explain)

Radeon HD 7870		80000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 65400 (448%)

Pixel Rate

The Radeon HD 7870 is a lot (approximately 448%) more effective at FSAA than the Radeon R7 240, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 26160 (448%)

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 information (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.