GeForce GTX 275 vs Radeon R9 M385X

Intro

Compare all that to the Radeon R9 M385X, which comes with core speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 275, in theory, should perform a lot faster than the Radeon R9 M385X in general. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 31008 (32%)

Texel Rate

The Radeon R9 M385X should be much (approximately 22%) better at anisotropic filtering than the GeForce GTX 275. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 10960 (22%)

Pixel Rate

The GeForce GTX 275 is a small bit (more or less 1%) more effective at AA than the Radeon R9 M385X, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 124 (1%)

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 MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once 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 AA, High Dynamic Range 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 worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.