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Radeon HD 4830 512MB vs Radeon R9 M275X

Intro

The Radeon HD 4830 512MB has core speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare all that to the Radeon R9 M275X, which features core speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X 50 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 45 Watts (90%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M275X should theoretically be a lot superior to the Radeon HD 4830 512MB overall. (explain)

Radeon R9 M275X 72000 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 14400 (25%)

Texel Rate

The Radeon R9 M275X is quite a bit (about 96%) more effective at AF than the Radeon HD 4830 512MB. (explain)

Radeon R9 M275X 36000 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 17600 (96%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M275X is the winner, by far. (explain)

Radeon R9 M275X 14400 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 5200 (57%)

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

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Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon R9 M275X

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

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Model Radeon HD 4830 512MB Radeon R9 M275X
Manufacturer AMD AMD
Year Oct 21, 2008 May 1 2014
Code Name RV770 LE Venus XTX
Memory 512 MB 2048 MB
Core Speed 575 MHz 900 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 95 watts 50 watts
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 18400 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 640(128x5) 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million (Unknown) 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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number 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 better this number, the better the graphics 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 maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to 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 reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon R9 M275X

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.

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