Geforce GTX 770 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with a core clock speed of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Geforce GTX 770		230 Watts
	Difference: 105 Watts (84%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 770 should theoretically be quite a bit superior to the Radeon R9 M295X overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 48384 (27%)

Texel Rate

The Geforce GTX 770 is quite a bit (more or less 39%) faster with regards to anisotropic filtering than the Radeon R9 M295X. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 37888 (39%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 770 is a better choice, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 9472 (39%)

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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.