Compare any two graphics cards:
VS

Radeon HD 4750 vs Radeon HD 7770

Intro

The Radeon HD 4750 has a clock speed of 730 MHz and a GDDR5 memory frequency of 800 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 7770, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1125 MHz on this particular model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4750 75 Watts
Radeon HD 7770 80 Watts
Difference: 5 Watts (7%)

Memory Bandwidth

Theoretically, the Radeon HD 7770 should perform a lot faster than the Radeon HD 4750 overall. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 20800 (41%)

Texel Rate

The Radeon HD 7770 should be much (about 71%) better at texture filtering than the Radeon HD 4750. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 16640 (71%)

Pixel Rate

The Radeon HD 7770 will be much (more or less 37%) better at AA than the Radeon HD 4750, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon HD 4750 11680 Mpixels/sec
Difference: 4320 (37%)

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 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

Display Specifications

Hide Specifications

Model Radeon HD 4750 Radeon HD 7770
Manufacturer AMD AMD
Year February 2012
Code Name RV740 Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 730 MHz 1000 MHz
Memory Speed 3200 MHz 4500 MHz
Power (Max TDP) 75 watts 80 watts
Bandwidth 51200 MB/sec 72000 MB/sec
Texel Rate 23360 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 11680 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 640(128x5) 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 826 million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4750

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.

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