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Radeon HD 4650 512MB vs Radeon R9 M390X

Intro

The Radeon HD 4650 512MB has a GPU clock speed of 600 MHz, and the 512 MB of DDR2 memory is set to run at 500 MHz through a 128-bit bus. It also is comprised of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

Compare those specs to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB 55 Watts
Radeon R9 M390X 125 Watts
Difference: 70 Watts (127%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should in theory be quite a bit superior to the Radeon HD 4650 512MB in general. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon HD 4650 512MB 16000 MB/sec
Difference: 144000 (900%)

Texel Rate

The Radeon R9 M390X is a lot (more or less 382%) more effective at AF than the Radeon HD 4650 512MB. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon HD 4650 512MB 19200 Mtexels/sec
Difference: 73344 (382%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is a better choice, and very much so. (explain)

Radeon R9 M390X 23136 Mpixels/sec
Radeon HD 4650 512MB 4800 Mpixels/sec
Difference: 18336 (382%)

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 M390X

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 M390X
Manufacturer AMD AMD
Year Sep 10, 2008 2015
Code Name RV730 PRO Tonga
Memory 512 MB 4096 MB
Core Speed 600 MHz 723 MHz
Memory Speed 1000 MHz 5000 MHz
Power (Max TDP) 55 watts 125 watts
Bandwidth 16000 MB/sec 160000 MB/sec
Texel Rate 19200 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 4800 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 320(64x5) 2048
Texture Mapping Units 32 128
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 514 million (Unknown) million
Bus PCIe 2.0 x16, AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card 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 in one 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. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4650 512MB

Amazon.com

Check prices at:

Radeon R9 M390X

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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