Radeon R7 250 vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which has a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon R7 250		65 Watts
	Difference: 15 Watts (30%)

Memory Bandwidth

Theoretically, the Radeon R7 250 should be a bit faster than the Radeon R9 M275X in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon R9 M275X is a lot (about 50%) better at anisotropic filtering than the Radeon R7 250. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 12000 (50%)

Pixel Rate

The Radeon R9 M275X is quite a bit (about 80%) better at FSAA than the Radeon R7 250, and will be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 6400 (80%)

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 maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics 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 that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.