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Radeon HD 6450 (OEM) 1GB vs Radeon R9 M390X

Intro

The Radeon HD 6450 (OEM) 1GB comes with clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 160 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare all that to the Radeon R9 M390X, which comes with GPU clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Radeon R9 M390X 125 Watts
Difference: 94 Watts (303%)

Memory Bandwidth

The Radeon R9 M390X, in theory, should be a lot faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Difference: 131200 (456%)

Texel Rate

The Radeon R9 M390X will be quite a bit (about 1442%) better at texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 86544 (1442%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M390X is the winner, by a large margin. (explain)

Radeon R9 M390X 23136 Mpixels/sec
Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Difference: 20136 (671%)

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 6450 (OEM) 1GB

Amazon.com

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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 6450 (OEM) 1GB Radeon R9 M390X
Manufacturer AMD AMD
Year February 2011 2015
Code Name Caicos Tonga
Memory 1024 MB 4096 MB
Core Speed 750 MHz 723 MHz
Memory Speed 3600 MHz 5000 MHz
Power (Max TDP) 31 watts 125 watts
Bandwidth 28800 MB/sec 160000 MB/sec
Texel Rate 6000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 3000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 160 2048
Texture Mapping Units 8 128
Render Output Units 4 32
Bus Type GDDR5 GDDR5
Bus Width 64-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 370 million (Unknown) million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 6450 (OEM) 1GB

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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