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Radeon HD 4830 512MB vs Radeon R9 390 8G

Intro

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

Compare those specs to the Radeon R9 390 8G, which features a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit memory bus, and makes use of a 28 nm design. It is comprised of 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
Radeon R9 390 8G 275 Watts
Difference: 180 Watts (189%)

Memory Bandwidth

In theory, the Radeon R9 390 8G should be 567% faster than the Radeon HD 4830 512MB in general, because of its higher data rate. (explain)

Radeon R9 390 8G 384000 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 326400 (567%)

Texel Rate

The Radeon R9 390 8G is much (more or less 770%) faster with regards to AF than the Radeon HD 4830 512MB. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 141600 (770%)

Pixel Rate

The Radeon R9 390 8G is a lot (about 596%) more effective at FSAA than the Radeon HD 4830 512MB, and will be able to handle higher resolutions more effectively. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 54800 (596%)

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 390 8G

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 390 8G
Manufacturer AMD AMD
Year Oct 21, 2008 June 2015
Code Name RV770 LE Grenada PRO
Memory 512 MB 8192 MB
Core Speed 575 MHz 1000 MHz
Memory Speed 1800 MHz 6000 MHz
Power (Max TDP) 95 watts 275 watts
Bandwidth 57600 MB/sec 384000 MB/sec
Texel Rate 18400 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 9200 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 640(128x5) 2560
Texture Mapping Units 32 160
Render Output Units 16 64
Bus Type GDDR3 GDDR5
Bus Width 256-bit 512-bit
Fab Process 55 nm 28 nm
Transistors 956 million 6200 million
Bus PCIe 2.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface 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 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 4830 512MB

Amazon.com

Check prices at:

Radeon R9 390 8G

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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