Radeon HD 7770 vs Radeon R9 295X2

Intro

Compare all that to the Radeon R9 295X2, which features clock speeds of 1018 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2816 SPUs along with 176 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 295X2		21205 points
Radeon HD 7770		3180 points
	Difference: 18025 (567%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 295X2		500 Watts
	Difference: 420 Watts (525%)

Memory Bandwidth

The Radeon R9 295X2 should theoretically perform much faster than the Radeon HD 7770 overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 568000 (789%)

Texel Rate

The Radeon R9 295X2 is much (more or less 796%) more effective at AF than the Radeon HD 7770. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 318336 (796%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 295X2 is a better choice, and very much so. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 114304 (714%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.