Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 5870 vs Radeon HD 7770

Intro

The Radeon HD 5870 comes with core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs along with 80 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM runs at a frequency of 1125 MHz on this specific card. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Radeon HD 5870 188 Watts
Difference: 108 Watts (135%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5870 should in theory be much superior to the Radeon HD 7770 overall. (explain)

Radeon HD 5870 153600 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 81600 (113%)

Texel Rate

The Radeon HD 5870 should be a lot (approximately 70%) more effective at texture filtering than the Radeon HD 7770. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 28000 (70%)

Pixel Rate

The Radeon HD 5870 should be much (more or less 70%) more effective at AA than the Radeon HD 7770, and also able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 11200 (70%)

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 5870

Amazon.com

Radeon HD 7770

Amazon.com

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 5870 Radeon HD 7770
Manufacturer AMD AMD
Year September 23, 2009 February 2012
Code Name Cypress XT Cape Verde XT
Fab Process 40 nm 28 nm
Bus PCIe 2.1 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 850 MHz 1000 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1200 MHz (4800 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 1600(320x5) 640
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2
Power (Max TDP) 188 watts 80 watts
Shader Model 5.0 5.0
Bandwidth 153600 MB/sec 72000 MB/sec
Texel Rate 68000 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Comments

Be the first to leave a comment!

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

WP-SpamFree by Pole Position Marketing