GeForce 8300 GS (OEM) vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which comes with clock speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8300 GS (OEM)		40 Watts
Radeon R9 M275X		50 Watts
	Difference: 10 Watts (25%)

Memory Bandwidth

In theory, the Radeon R9 M275X will be 1025% faster than the GeForce 8300 GS (OEM) overall, due to its higher bandwidth. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce 8300 GS (OEM)		6400 MB/sec
	Difference: 65600 (1025%)

Texel Rate

The Radeon R9 M275X should be quite a bit (about 1900%) faster with regards to anisotropic filtering than the GeForce 8300 GS (OEM). (explain)

Radeon R9 M275X		36000 Mtexels/sec
GeForce 8300 GS (OEM)		1800 Mtexels/sec
	Difference: 34200 (1900%)

Pixel Rate

The Radeon R9 M275X is much (about 1500%) better at anti-aliasing than the GeForce 8300 GS (OEM), and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce 8300 GS (OEM)		900 Mpixels/sec
	Difference: 13500 (1500%)

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 information (counted in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.