Radeon HD 6770 vs Radeon R7 240

Intro

Compare all of that to the Radeon R7 240, which makes use of a 28 nm design. AMD has clocked the core speed at 730 MHz. The DDR3 RAM is set to run at a frequency of 900 MHz on this model. It features 320 SPUs along with 20 Texture Address Units and 8 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 HD 6770		1520 points
Radeon R7 240		1218 points
	Difference: 302 (25%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 6770		108 Watts
	Difference: 78 Watts (260%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 will be 133% faster than the Radeon R7 240 overall, due to its greater data rate. (explain)

Radeon HD 6770		67200 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 38400 (133%)

Texel Rate

The Radeon HD 6770 will be quite a bit (approximately 147%) more effective at AF than the Radeon R7 240. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 21400 (147%)

Pixel Rate

The Radeon HD 6770 should be a lot (about 147%) faster with regards to full screen anti-aliasing than the Radeon R7 240, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 8560 (147%)

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 (measured in megabytes per second) that can be transported across 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 type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at 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 can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.