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Radeon HD 4830 1GB vs Radeon R9 M270X

Intro

The Radeon HD 4830 1GB has a GPU clock speed of 575 MHz, and the 1024 MB of GDDR4 memory runs at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon R9 M270X, which comes with a core clock frequency of 725 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M270X should be a lot faster than the Radeon HD 4830 1GB overall. (explain)

Radeon R9 M270X 72000 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 14400 (25%)

Texel Rate

The Radeon R9 M270X should be a lot (approximately 58%) more effective at texture filtering than the Radeon HD 4830 1GB. (explain)

Radeon R9 M270X 29000 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 10600 (58%)

Pixel Rate

The Radeon R9 M270X will be a lot (approximately 26%) more effective at anti-aliasing than the Radeon HD 4830 1GB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M270X 11600 Mpixels/sec
Radeon HD 4830 1GB 9200 Mpixels/sec
Difference: 2400 (26%)

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 1GB

Amazon.com

Check prices at:

Radeon R9 M270X

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 1GB Radeon R9 M270X
Manufacturer AMD AMD
Year Oct 21, 2008 May 1 2014
Code Name RV770 LE Venus XT
Memory 1024 MB 2048 MB
Core Speed 575 MHz 725 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 95 watts (Unknown) watts
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 18400 Mtexels/sec 29000 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 640(128x5) 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR4 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: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs 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 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 get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4830 1GB

Amazon.com

Check prices at:

Radeon R9 M270X

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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