GeForce GT 310 vs Radeon HD 7770

Intro

Compare all that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this specific card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 310		31 Watts
Radeon HD 7770		80 Watts
	Difference: 49 Watts (158%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7770 should in theory be much better than the GeForce GT 310 in general. (explain)

Radeon HD 7770		72000 MB/sec
GeForce GT 310		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon HD 7770 should be a lot (more or less 749%) more effective at texture filtering than the GeForce GT 310. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce GT 310		4712 Mtexels/sec
	Difference: 35288 (749%)

Pixel Rate

The Radeon HD 7770 will be quite a bit (approximately 579%) faster with regards to anti-aliasing than the GeForce GT 310, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce GT 310		2356 Mpixels/sec
	Difference: 13644 (579%)

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 data (counted in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.