Radeon HD 7770 vs Radeon R9 280

Intro

Compare those specifications to the Radeon R9 280, which uses a 28 nm design. AMD has set the core speed at 933 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this particular card. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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 280		7961 points
Radeon HD 7770		3180 points
	Difference: 4781 (150%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 280		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

Performance-wise, the Radeon R9 280 should in theory be a lot superior to the Radeon HD 7770 overall. (explain)

Radeon R9 280		240000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 168000 (233%)

Texel Rate

The Radeon R9 280 will be much (about 161%) better at AF than the Radeon HD 7770. (explain)

Radeon R9 280		104496 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 64496 (161%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 280 is a better choice, by a large margin. (explain)

Radeon R9 280		29856 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 13856 (87%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.