Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 4870 2GB vs Radeon HD 5850

Intro

The Radeon HD 4870 2GB makes use of a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 RAM is set to run at a frequency of 900 MHz on this specific model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon HD 5850, which comes with GPU clock speed of 725 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is made up of 1440(288x5) SPUs, 72 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
Radeon HD 5850 151 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5850 is 11% faster than the Radeon HD 4870 2GB in general, because of its greater bandwidth. (explain)

Radeon HD 5850 128000 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 12800 (11%)

Texel Rate

The Radeon HD 5850 is a lot (about 74%) more effective at anisotropic filtering than the Radeon HD 4870 2GB. (explain)

Radeon HD 5850 52200 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 22200 (74%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5850 is the winner, by far. (explain)

Radeon HD 5850 23200 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 11200 (93%)

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 4870 2GB

Amazon.com

Check prices at:

Radeon HD 5850

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 2GB Radeon HD 5850
Manufacturer AMD AMD
Year Jun 25, 2008 September 30, 2009
Code Name RV770 XT Cypress PRO
Memory 2048 MB 1024 MB
Core Speed 750 MHz 725 MHz
Memory Speed 3600 MHz 4000 MHz
Power (Max TDP) 150 watts 151 watts
Bandwidth 115200 MB/sec 128000 MB/sec
Texel Rate 30000 Mtexels/sec 52200 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 23200 Mpixels/sec
Unified Shaders 800(160x5) 1440(288x5)
Texture Mapping Units 40 72
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 956 million 2154 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour 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 rate is also dependant on quite a few other factors, most notably 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 4870 2GB

Amazon.com

Check prices at:

Radeon HD 5850

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