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Radeon HD 4830 512MB vs Radeon R7 250

Intro

The Radeon HD 4830 512MB features a clock frequency of 575 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Compare those specs to the Radeon R7 250, which comes with core clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs as well as 24 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 30 Watts (46%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 should perform quite a bit faster than the Radeon HD 4830 512MB in general. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 16000 (28%)

Texel Rate

The Radeon R7 250 will be a lot (approximately 30%) better at AF than the Radeon HD 4830 512MB. (explain)

Radeon R7 250 24000 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 5600 (30%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4830 512MB is superior to the Radeon R7 250, but not by far. (explain)

Radeon HD 4830 512MB 9200 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 1200 (15%)

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 R7 250

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 R7 250
Manufacturer AMD AMD
Year Oct 21, 2008 October 2013
Code Name RV770 LE Oland XT
Memory 512 MB 1024 MB
Core Speed 575 MHz 1000 MHz
Memory Speed 1800 MHz 4600 MHz
Power (Max TDP) 95 watts 65 watts
Bandwidth 57600 MB/sec 73600 MB/sec
Texel Rate 18400 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 640(128x5) 384
Texture Mapping Units 32 24
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1040 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 max amount of data (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 can be processed per 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 amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock 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 fill rate also depends on many other factors, most notably 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 4830 512MB

Amazon.com

Check prices at:

Radeon R7 250

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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