 |
 |
Radeon HD 4890 1GB vs Radeon R9 270X
Intro
The Radeon HD 4890 1GB comes with a clock frequency of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare that to the Radeon R9 270X, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1400 MHz on this specific card. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon R9 270X |
|
180 Watts |
| Radeon HD 4890 1GB |
|
190 Watts |
|
|
Memory Bandwidth
Theoretically speaking, the Radeon R9 270X is 44% faster than the Radeon HD 4890 1GB in general, due to its greater bandwidth. (explain)
| Radeon R9 270X |
|
179200 MB/sec |
| Radeon HD 4890 1GB |
|
124800 MB/sec |
|
|
Texel Rate
The Radeon R9 270X should be quite a bit (about 100%) more effective at AF than the Radeon HD 4890 1GB. (explain)| Radeon R9 270X |
|
80000 Mtexels/sec |
| Radeon HD 4890 1GB |
|
40000 Mtexels/sec |
|
|
Pixel Rate
The Radeon R9 270X should be quite a bit (about 100%) better at AA than the Radeon HD 4890 1GB, and capable of handling higher resolutions without slowing down too much. (explain)| Radeon R9 270X |
|
32000 Mpixels/sec |
| Radeon HD 4890 1GB |
|
16000 Mpixels/sec |
|
|
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 4890 1GBAmazon.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 4890 1GB | Radeon R9 270X |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Apr 2, 2009 | October 2013 |
| Code Name | RV790 XT | Curacao XT |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 1000 MHz | 1000 MHz |
| Memory Speed | 3900 MHz | 5600 MHz |
| Power (Max TDP) | 190 watts | 180 watts |
| Bandwidth | 124800 MB/sec | 179200 MB/sec |
| Texel Rate | 40000 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 16000 Mpixels/sec | 32000 Mpixels/sec |
| Unified Shaders | 800(160x5) | 1280 |
| Texture Mapping Units | 40 | 80 |
| Render Output Units | 16 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 55 nm | 28 nm |
| Transistors | 959 million | 2800 million |
| Bus | PCIe 2.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11.2 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.3 |
Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure 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 drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 4890 1GBAmazon.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
Be the first to leave a comment!