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Radeon HD 6450 (OEM) vs Radeon HD 7770

Intro

The Radeon HD 6450 (OEM) comes with a GPU core clock speed of 625 MHz, and the 512 MB of GDDR3 memory runs at 800 MHz through a 64-bit bus. It also features 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 7770, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator 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 7770 3180 points
Radeon HD 6450 (OEM) 340 points
Difference: 2840 (835%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 7770 80 Watts
Difference: 49 Watts (158%)

Memory Bandwidth

The Radeon HD 7770 should in theory perform much faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 59200 (463%)

Texel Rate

The Radeon HD 7770 should be a lot (about 700%) faster with regards to AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 35000 (700%)

Pixel Rate

The Radeon HD 7770 will be a lot (about 540%) better at FSAA than the Radeon HD 6450 (OEM), and also able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7770 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

Check prices at:

Radeon HD 7770

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) Radeon HD 7770
Manufacturer AMD AMD
Year February 2011 February 2012
Code Name Caicos Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 625 MHz 1000 MHz
Memory Speed 1600 MHz 4500 MHz
Power (Max TDP) 31 watts 80 watts
Bandwidth 12800 MB/sec 72000 MB/sec
Texel Rate 5000 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 160 640
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 370 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - 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 7770

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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