Radeon HD 7770 vs Radeon R9 290X

Intro

Compare all that to the Radeon R9 290X, which features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 512-bit memory bus, and makes use of a 28 nm design. It is made up of 2816 SPUs, 176 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 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 is 344% faster than the Radeon HD 7770 in general, due to its higher data rate. (explain)

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

Texel Rate

The Radeon R9 290X should be a lot (approximately 252%) more effective at anisotropic filtering 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 should be a lot (approximately 220%) better at anti-aliasing than the Radeon HD 7770, and capable of handling higher resolutions better. (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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.