Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 4870 X2 vs Radeon HD 7790

Intro

The Radeon HD 4870 X2 comes with a GPU core speed of 750 MHz, and the 1024 MB of GDDR5 memory is set to run at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Compare that to the Radeon HD 7790, which features a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1500 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Radeon HD 4870 X2 350 Watts
Difference: 265 Watts (312%)

Memory Bandwidth

Theoretically, the Radeon HD 4870 X2 should be much faster than the Radeon HD 7790 overall. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 134400 (140%)

Texel Rate

The Radeon HD 4870 X2 should be just a bit (about 7%) better at AF than the Radeon HD 7790. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 4000 (7%)

Pixel Rate

The Radeon HD 4870 X2 is a lot (approximately 50%) more effective at AA than the Radeon HD 7790, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 8000 (50%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Display Prices

Hide Prices

Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon HD 7790

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 4870 X2 Radeon HD 7790
Manufacturer AMD AMD
Year Aug 12, 2008 March 2013
Code Name R700 Bonaire XT
Memory 1024 MB (x2) 1024 MB
Core Speed 750 MHz (x2) 1000 MHz
Memory Speed 3600 MHz (x2) 6000 MHz
Power (Max TDP) 350 watts 85 watts
Bandwidth 230400 MB/sec 96000 MB/sec
Texel Rate 60000 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 800(160x5) (x2) 896
Texture Mapping Units 40 (x2) 56
Render Output Units 16 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 2080 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel 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 maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon HD 7790

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