Radeon HD 7770 vs Radeon R9 290

Intro

Compare all of that to the Radeon R9 290, which comes with a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

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

As far as performance goes, the Radeon R9 290 should theoretically be much better than the Radeon HD 7770 overall. (explain)

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

Texel Rate

The Radeon R9 290 will be much (about 220%) better at AF than the Radeon HD 7770. (explain)

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

Pixel Rate

The Radeon R9 290 is a lot (about 220%) faster with regards to AA than the Radeon HD 7770, and should be able to handle higher resolutions more effectively. (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 max amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.