Radeon HD 7770 vs Radeon R9 290

Intro

Compare those specifications to the Radeon R9 290, which features a GPU core clock speed of 800 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 512-bit bus. It also features 2560 SPUs, 160 TAUs, and 64 Raster Operation 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 290		9876 points
Radeon HD 7770		3180 points
	Difference: 6696 (211%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 290		300 Watts
	Difference: 220 Watts (275%)

Memory Bandwidth

In theory, the Radeon R9 290 is 344% faster than the Radeon HD 7770 in general, due to its higher bandwidth. (explain)

Radeon R9 290		320000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 248000 (344%)

Texel Rate

The Radeon R9 290 should be quite a bit (approximately 220%) better at texture filtering than the Radeon HD 7770. (explain)

Radeon R9 290		128000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 88000 (220%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 290 is the winner, by a large margin. (explain)

Radeon R9 290		51200 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 35200 (220%)

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 data (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.