GeForce GTX 275 vs Radeon R9 380 2G

Intro

Compare those specs to the Radeon R9 380 2G, which uses a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 memory works at a frequency of 1425 MHz on this model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
GeForce GTX 275		219 Watts
	Difference: 29 Watts (15%)

Memory Bandwidth

The Radeon R9 380 2G should in theory be a lot faster than the GeForce GTX 275 overall. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 55392 (44%)

Texel Rate

The Radeon R9 380 2G should be a lot (approximately 115%) more effective at anisotropic filtering than the GeForce GTX 275. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 58000 (115%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 2G is superior to the GeForce GTX 275, and very much so. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 13316 (75%)

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 megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.