Radeon R7 250 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which comes with core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs along with 160 TAUs and 64 Rasterization Operator 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 390 8G		12733 points
Radeon R7 250		1836 points
	Difference: 10897 (594%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon R9 390 8G		275 Watts
	Difference: 210 Watts (323%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G is 422% quicker than the Radeon R7 250 overall, due to its higher bandwidth. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 310400 (422%)

Texel Rate

The Radeon R9 390 8G is much (about 567%) faster with regards to texture filtering than the Radeon R7 250. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 136000 (567%)

Pixel Rate

The Radeon R9 390 8G is much (about 700%) better at AA than the Radeon R7 250, and able to handle higher resolutions while still performing well. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 56000 (700%)

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 information (measured in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units 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 the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.