Radeon R7 250 vs Radeon R9 M270X

Intro

Compare all that to the Radeon R9 M270X, which has a GPU core clock speed of 725 MHz, and 2048 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R7 250 should theoretically be a little bit superior to the Radeon R9 M270X overall. (explain)

Radeon R7 250		73600 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon R9 M270X will be quite a bit (approximately 21%) more effective at anisotropic filtering than the Radeon R7 250. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 5000 (21%)

Pixel Rate

The Radeon R9 M270X should be a lot (about 45%) better at full screen anti-aliasing than the Radeon R7 250, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 3600 (45%)

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 (in units of MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.