Compare any two graphics cards:
VS

Radeon HD 7870 vs Radeon R9 M395X

Intro

The Radeon HD 7870 comes with a GPU clock speed of 1000 MHz, and the 2048 MB of GDDR5 RAM runs at 1200 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 80 TAUs, and 32 ROPs.

Compare all of that to the Radeon R9 M395X, which comes with a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
Radeon HD 7870 175 Watts
Difference: 50 Watts (40%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X should be 4% faster than the Radeon HD 7870 overall, due to its higher data rate. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon R9 M395X is a small bit (approximately 16%) more effective at anisotropic filtering than the Radeon HD 7870. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 12544 (16%)

Pixel Rate

The Radeon HD 7870 should be a lot (about 38%) faster with regards to AA than the Radeon R9 M395X, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon R9 M395X 23136 Mpixels/sec
Difference: 8864 (38%)

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

Amazon.com

Check prices at:

Radeon R9 M395X

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 Radeon R9 M395X
Manufacturer AMD AMD
Year March 2012 2015
Code Name Pitcairn XT Tonga
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 723 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 175 watts 125 watts
Bandwidth 153600 MB/sec 160000 MB/sec
Texel Rate 80000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7870

Amazon.com

Check prices at:

Radeon R9 M395X

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