I get commissions for purchases made through links on this page. (more info)

Compare any two graphics cards:
VS

Radeon HD 5450 vs Radeon HD 7970

Intro

The Radeon HD 5450 makes use of a 40 nm design. AMD has set the core frequency at 650 MHz. The DDR3 RAM runs at a speed of 800 MHz on this specific card. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare those specs to the Radeon HD 7970, which has a GPU core clock speed of 925 MHz, and 3072 MB of GDDR5 memory running at 1375 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
Radeon HD 7970 250 Watts
Difference: 231 Watts (1216%)

Memory Bandwidth

Theoretically, the Radeon HD 7970 should be a lot faster than the Radeon HD 5450 in general. (explain)

Radeon HD 7970 264000 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 251200 (1963%)

Texel Rate

The Radeon HD 7970 should be quite a bit (more or less 2177%) more effective at texture filtering than the Radeon HD 5450. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 113200 (2177%)

Pixel Rate

The Radeon HD 7970 will be quite a bit (approximately 1038%) more effective at AA than the Radeon HD 5450, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 27000 (1038%)

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

Display Prices

Hide Prices

Radeon HD 5450

Amazon.com

Check prices at:

Radeon HD 7970

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

Display Specifications

Hide Specifications

Model Radeon HD 5450 Radeon HD 7970
Manufacturer AMD AMD
Year February 4, 2010 January 2012
Code Name Cedar PRO Tahiti XT
Memory 512 MB 3072 MB
Core Speed 650 MHz 925 MHz
Memory Speed 1600 MHz 5500 MHz
Power (Max TDP) 19 watts 250 watts
Bandwidth 12800 MB/sec 264000 MB/sec
Texel Rate 5200 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 80(16x5) 2048
Texture Mapping Units 8 128
Render Output Units 4 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 292 million 4313 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 5450

Amazon.com

Check prices at:

Radeon HD 7970

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.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield