GeForce 9500 GT DDR2 vs Radeon R9 M275X

Intro

Compare that to the Radeon R9 M275X, which features a clock speed of 900 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon R9 M275X is 350% quicker than the GeForce 9500 GT DDR2 in general, because of its higher bandwidth. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce 9500 GT DDR2		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon R9 M275X is a lot (more or less 309%) more effective at texture filtering than the GeForce 9500 GT DDR2. (explain)

Radeon R9 M275X		36000 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 27200 (309%)

Pixel Rate

The Radeon R9 M275X should be much (approximately 227%) faster with regards to FSAA than the GeForce 9500 GT DDR2, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce 9500 GT DDR2		4400 Mpixels/sec
	Difference: 10000 (227%)

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 (counted in MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock 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 output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.