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

Compare any two graphics cards:
VS

Radeon HD 3650 512MB vs Radeon HD 6790

Intro

The Radeon HD 3650 512MB comes with a GPU core speed of 725 MHz, and the 512 MB of GDDR3 memory runs at 800 MHz through a 128-bit bus. It also features 120(24x5) Stream Processors, 8 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 6790, which has a core clock speed of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB 78 Watts
Radeon HD 6790 150 Watts
Difference: 72 Watts (92%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6790 should in theory be much superior to the Radeon HD 3650 512MB overall. (explain)

Radeon HD 6790 134400 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 108800 (425%)

Texel Rate

The Radeon HD 6790 is a lot (more or less 479%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 6790 33600 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 27800 (479%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6790 is a better choice, by a large margin. (explain)

Radeon HD 6790 13440 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 10540 (363%)

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 3650 512MB

Amazon.com

Check prices at:

Radeon HD 6790

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 3650 512MB Radeon HD 6790
Manufacturer AMD AMD
Year 2008 April 2011
Code Name RV635 PRO Barts LE
Memory 512 MB 1024 MB
Core Speed 725 MHz 840 MHz
Memory Speed 1600 MHz 4200 MHz
Power (Max TDP) 78 watts 150 watts
Bandwidth 25600 MB/sec 134400 MB/sec
Texel Rate 5800 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 120(24x5) 800
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1700 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 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 moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units 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 maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 512MB

Amazon.com

Check prices at:

Radeon HD 6790

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