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Radeon HD 4650 512MB vs Radeon R9 380 4G

Intro

The Radeon HD 4650 512MB makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The DDR2 RAM works at a speed of 500 MHz on this specific model. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Compare those specs to the Radeon R9 380 4G, which has GPU clock speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB 55 Watts
Radeon R9 380 4G 190 Watts
Difference: 135 Watts (245%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 4G should in theory be quite a bit better than the Radeon HD 4650 512MB in general. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon HD 4650 512MB 16000 MB/sec
Difference: 166400 (1040%)

Texel Rate

The Radeon R9 380 4G should be a lot (about 466%) more effective at AF than the Radeon HD 4650 512MB. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon HD 4650 512MB 19200 Mtexels/sec
Difference: 89440 (466%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 380 4G is a better choice, by a large margin. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon HD 4650 512MB 4800 Mpixels/sec
Difference: 26240 (547%)

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 4650 512MB

Amazon.com

Check prices at:

Radeon R9 380 4G

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 4650 512MB Radeon R9 380 4G
Manufacturer AMD AMD
Year Sep 10, 2008 June 2015
Code Name RV730 PRO Antigua PRO
Memory 512 MB 4096 MB
Core Speed 600 MHz 970 MHz
Memory Speed 1000 MHz 5700 MHz
Power (Max TDP) 55 watts 190 watts
Bandwidth 16000 MB/sec 182400 MB/sec
Texel Rate 19200 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 4800 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 320(64x5) 1792
Texture Mapping Units 32 112
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 514 million 5000 million
Bus PCIe 2.0 x16, AGP 8x 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 maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4650 512MB

Amazon.com

Check prices at:

Radeon R9 380 4G

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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