Radeon HD 7770 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with GPU core speed of 750 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 M295X		125 Watts
	Difference: 45 Watts (56%)

Memory Bandwidth

In theory, the Radeon R9 M295X should be much faster than the Radeon HD 7770 in general. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 M295X will be much (about 140%) more effective at texture filtering than the Radeon HD 7770. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 56000 (140%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M295X is superior to the Radeon HD 7770, and very much so. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 8000 (50%)

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 megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its 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 - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.