GeForce 8300 GS (OEM) vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which comes with a clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 384-bit memory bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8300 GS (OEM)		40 Watts
Radeon HD 7970		250 Watts
	Difference: 210 Watts (525%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be a lot faster than the GeForce 8300 GS (OEM) overall. (explain)

Radeon HD 7970		264000 MB/sec
GeForce 8300 GS (OEM)		6400 MB/sec
	Difference: 257600 (4025%)

Texel Rate

The Radeon HD 7970 is much (approximately 6478%) better at texture filtering than the GeForce 8300 GS (OEM). (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce 8300 GS (OEM)		1800 Mtexels/sec
	Difference: 116600 (6478%)

Pixel Rate

The Radeon HD 7970 is a lot (more or less 3189%) better at full screen anti-aliasing than the GeForce 8300 GS (OEM), and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce 8300 GS (OEM)		900 Mpixels/sec
	Difference: 28700 (3189%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.