Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 7870 XT vs Radeon R9 285

Intro

The Radeon HD 7870 XT has a GPU core speed of 925 MHz, and the 2048 MB of GDDR5 memory is set to run at 1500 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 285, which has core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

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 285 8500 points
Radeon HD 7870 XT 6390 points
Difference: 2110 (33%)

Ethereum Mining Hash Rate

Radeon R9 285 18 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 3 (20%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Radeon R9 285 190 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT should be a little bit faster than the Radeon R9 285 in general. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon R9 285 176000 MB/sec
Difference: 16000 (9%)

Texel Rate

The Radeon R9 285 is a small bit (about 16%) faster with regards to AF than the Radeon HD 7870 XT. (explain)

Radeon R9 285 102816 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 14016 (16%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7870 XT is superior to the Radeon R9 285, though not by far. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 224 (1%)

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

Display Prices

Hide Prices

Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon R9 285

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model Radeon HD 7870 XT Radeon R9 285
Manufacturer AMD AMD
Year November 2012 September 2014
Code Name Tahiti LE Tonga PRO
Memory 2048 MB 2048 MB
Core Speed 925 MHz 918 MHz
Memory Speed 6000 MHz 5500 MHz
Power (Max TDP) 185 watts 190 watts
Bandwidth 192000 MB/sec 176000 MB/sec
Texel Rate 88800 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 1536 1792
Texture Mapping Units 96 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.4

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon R9 285

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield