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Radeon HD 6450 (OEM) vs Radeon HD 7790

Intro

The Radeon HD 6450 (OEM) uses a 40 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 RAM works at a frequency of 800 MHz on this specific model. It features 160 SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare all of that to the Radeon HD 7790, which has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7790 4330 points
Radeon HD 6450 (OEM) 340 points
Difference: 3990 (1174%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 7790 85 Watts
Difference: 54 Watts (174%)

Memory Bandwidth

The Radeon HD 7790 should theoretically be a lot faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 7790 96000 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 83200 (650%)

Texel Rate

The Radeon HD 7790 will be a lot (more or less 1020%) better at AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 7790 56000 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 51000 (1020%)

Pixel Rate

The Radeon HD 7790 will be quite a bit (more or less 540%) better at AA than the Radeon HD 6450 (OEM), and will be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7790 16000 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 13500 (540%)

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)

Amazon.com

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Radeon HD 7790

Amazon.com

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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) Radeon HD 7790
Manufacturer AMD AMD
Year February 2011 March 2013
Code Name Caicos Bonaire XT
Memory 512 MB 1024 MB
Core Speed 625 MHz 1000 MHz
Memory Speed 1600 MHz 6000 MHz
Power (Max TDP) 31 watts 85 watts
Bandwidth 12800 MB/sec 96000 MB/sec
Texel Rate 5000 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 160 896
Texture Mapping Units 8 56
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 370 million 2080 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 6450 (OEM)

Amazon.com

Check prices at:

Radeon HD 7790

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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