 |
 |
Radeon HD 7870 vs Radeon R9 270X
Intro
The Radeon HD 7870 has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.Compare all of that to the Radeon R9 270X, which has GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 TAUs, and 32 Raster Operation Units.
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 270X |
|
6590 points |
| Radeon HD 7870 |
|
6230 points |
|
|
Zcash Mining Hash Rate
| Radeon R9 270X |
|
177 Sol/s |
| Radeon HD 7870 |
|
172 Sol/s |
|
|
Ethereum Mining Hash Rate
| Radeon R9 270X |
|
18 Mh/s |
| Radeon HD 7870 |
|
16 Mh/s |
|
|
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7870 |
|
175 Watts |
| Radeon R9 270X |
|
180 Watts |
|
|
Memory Bandwidth
The Radeon R9 270X should theoretically perform just a bit faster than the Radeon HD 7870 in general. (explain)
| Radeon R9 270X |
|
179200 MB/sec |
| Radeon HD 7870 |
|
153600 MB/sec |
|
|
Texel Rate
Both cards have exactly the same texel rate, so in theory they should be equally good at at AF. (explain)Pixel Rate
Both cards have exactly the same pixel fill rate, so in theory they should perform equally good at at full screen anti-aliasing, and be able to handle the same resolutions. (explain)
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
Radeon HD 7870Amazon.com
Check prices at:
|
Radeon R9 270XAmazon.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
| Model | Radeon HD 7870 | Radeon R9 270X |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | March 2012 | October 2013 |
| Code Name | Pitcairn XT | Curacao XT |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 1000 MHz | 1000 MHz |
| Memory Speed | 4800 MHz | 5600 MHz |
| Power (Max TDP) | 175 watts | 180 watts |
| Bandwidth | 153600 MB/sec | 179200 MB/sec |
| Texel Rate | 80000 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 32000 Mpixels/sec | 32000 Mpixels/sec |
| Unified Shaders | 1280 | 1280 |
| Texture Mapping Units | 80 | 80 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 28 nm | 28 nm |
| Transistors | 2800 million | 2800 million |
| Bus | PCIe 3.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11.1 | DirectX 11.2 |
| OpenGL Version | OpenGL 4.2 | OpenGL 4.3 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 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, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 7870Amazon.com
Check prices at:
|
Radeon R9 270XAmazon.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
5 Responses to “Radeon HD 7870 vs Radeon R9 270X”The fact that the Memory Bandwidth is higher at the r9 270x means that she will perform better at more than one screen or on a TV screen ,for example
Dear sir
please i need your help.
i have old motherboard,it does not have (BUS PCIe 3.0 16).
it does have (PCIe 2.1 16)
please Does these graphic card(R9 270X) OR (HD 7870 2GB),works with my motherboard.
please i don't want any error or Blue screen
i hope to hear from you very soon
my kindest regards
habib
Habib, you are fine. A 3.0 card is backwards compatible with 2.1
Why is the ASUS 7870 so much more expensive than the ASUS R2? Please someone break that down.
jakmack, it is because that was the final price of the product, they no longer make the 7870