Geforce GTX 770 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which comes with a clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Geforce GTX 770		230 Watts
	Difference: 105 Watts (84%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 should perform much faster than the Radeon R9 M390X overall. (explain)

Geforce GTX 770		224384 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 64384 (40%)

Texel Rate

The Geforce GTX 770 is quite a bit (approximately 45%) more effective at AF than the Radeon R9 M390X. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 41344 (45%)

Pixel Rate

The Geforce GTX 770 will be a lot (more or less 45%) more effective at full screen anti-aliasing than the Radeon R9 M390X, and will be capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 10336 (45%)

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 information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.