Compare any two graphics cards:
VS

Radeon HD 4770 vs Radeon HD 4830 1GB

Intro

The Radeon HD 4770 features core speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Compare those specifications to the Radeon HD 4830 1GB, which makes use of a 55 nm design. AMD has clocked the core speed at 575 MHz. The GDDR4 RAM works at a frequency of 900 MHz on this specific model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770 80 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 15 Watts (19%)

Memory Bandwidth

The Radeon HD 4830 1GB should theoretically be a small bit faster than the Radeon HD 4770 overall. (explain)

Radeon HD 4830 1GB 57600 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 6400 (13%)

Texel Rate

The Radeon HD 4770 will be quite a bit (about 30%) better at texture filtering than the Radeon HD 4830 1GB. (explain)

Radeon HD 4770 24000 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 5600 (30%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4770 is a better choice, and very much so. (explain)

Radeon HD 4770 12000 Mpixels/sec
Radeon HD 4830 1GB 9200 Mpixels/sec
Difference: 2800 (30%)

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 4770

Amazon.com

Check prices at:

Radeon HD 4830 1GB

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 4770 Radeon HD 4830 1GB
Manufacturer AMD AMD
Year Apr 28, 2009 Oct 21, 2008
Code Name RV740 RV770 LE
Memory 512 MB 1024 MB
Core Speed 750 MHz 575 MHz
Memory Speed 3200 MHz 1800 MHz
Power (Max TDP) 80 watts 95 watts
Bandwidth 51200 MB/sec 57600 MB/sec
Texel Rate 24000 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 640(128x5) 640(128x5)
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 826 million 956 million
Bus PCIe 2.0 x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4770

Amazon.com

Check prices at:

Radeon HD 4830 1GB

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