Radeon HD 7770 vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is comprised of 384 SPUs, 24 TAUs, 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 7770		3180 points
Radeon R7 250		1836 points
	Difference: 1344 (73%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon HD 7770		80 Watts
	Difference: 15 Watts (23%)

Memory Bandwidth

The Radeon R7 250 should in theory be a little bit faster than the Radeon HD 7770 in general. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 7770 is quite a bit (more or less 67%) better at texture filtering than the Radeon R7 250. (explain)

Radeon HD 7770		40000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 16000 (67%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7770 is the winner, by far. (explain)

Radeon HD 7770		16000 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 8000 (100%)

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 maximum amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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