Compare any two graphics cards:
VS

Radeon HD 4750 vs Radeon HD 6950

Intro

The Radeon HD 4750 makes use of a 40 nm design. AMD has set the core speed at 730 MHz. The GDDR5 memory works at a speed of 800 MHz on this specific model. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 6950, which comes with a clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It features 1408 SPUs, 88 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
Radeon HD 6950 200 Watts
Difference: 125 Watts (167%)

Memory Bandwidth

In theory, the Radeon HD 6950 should be 213% quicker than the Radeon HD 4750 in general, due to its higher bandwidth. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 108800 (213%)

Texel Rate

The Radeon HD 6950 should be quite a bit (about 201%) better at anisotropic filtering than the Radeon HD 4750. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 47040 (201%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6950 is the winner, and very much so. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 4750 11680 Mpixels/sec
Difference: 13920 (119%)

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 4750

Amazon.com

Check prices at:

Radeon HD 6950

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 4750 Radeon HD 6950
Manufacturer AMD AMD
Year December 2010
Code Name RV740 Cayman Pro
Memory 512 MB 1024 MB
Core Speed 730 MHz 800 MHz
Memory Speed 3200 MHz 5000 MHz
Power (Max TDP) 75 watts 200 watts
Bandwidth 51200 MB/sec 160000 MB/sec
Texel Rate 23360 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 11680 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 640(128x5) 1408
Texture Mapping Units 32 88
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 826 million 2640 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4750

Amazon.com

Check prices at:

Radeon HD 6950

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