Radeon HD 7790 vs Radeon R9 290

Intro

Compare those specs to the Radeon R9 290, which features a clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It is comprised of 2560 SPUs, 160 Texture Address Units, 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 7790		4330 points
	Difference: 5546 (128%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 290		300 Watts
	Difference: 215 Watts (253%)

Memory Bandwidth

As far as performance goes, the Radeon R9 290 should theoretically be much superior to the Radeon HD 7790 in general. (explain)

Radeon R9 290		320000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 224000 (233%)

Texel Rate

The Radeon R9 290 is a lot (approximately 129%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon R9 290		128000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 72000 (129%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 290 is a better choice, by a large margin. (explain)

Radeon R9 290		51200 Mpixels/sec
Radeon HD 7790		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 data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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