Radeon HD 7770 vs Radeon R9 290X

Intro

Compare that to the Radeon R9 290X, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular model. It features 2816 SPUs as well as 176 TAUs and 64 ROPs.

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 290X		10609 points
Radeon HD 7770		3180 points
	Difference: 7429 (234%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon R9 290X should perform a lot faster than the Radeon HD 7770 in general. (explain)

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

Texel Rate

The Radeon R9 290X should be quite a bit (approximately 252%) better at AF than the Radeon HD 7770. (explain)

Radeon R9 290X		140800 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 100800 (252%)

Pixel Rate

The Radeon R9 290X will be quite a bit (approximately 220%) better at full screen anti-aliasing than the Radeon HD 7770, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 290X		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 maximum amount of information (counted in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.