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Radeon HD 4790 vs Radeon R7 370 4G

Intro

The Radeon HD 4790 features core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon R7 370 4G, which has a core clock speed of 975 MHz and a GDDR5 memory frequency of 1400 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 370 4G will be 75% quicker than the Radeon HD 4790 in general, due to its greater bandwidth. (explain)

Radeon R7 370 4G 179200 MB/sec
Radeon HD 4790 102400 MB/sec
Difference: 76800 (75%)

Texel Rate

The Radeon R7 370 4G is quite a bit (more or less 225%) more effective at anisotropic filtering than the Radeon HD 4790. (explain)

Radeon R7 370 4G 62400 Mtexels/sec
Radeon HD 4790 19200 Mtexels/sec
Difference: 43200 (225%)

Pixel Rate

The Radeon R7 370 4G will be a lot (approximately 225%) better at FSAA than the Radeon HD 4790, and also should be capable of handling higher resolutions more effectively. (explain)

Radeon R7 370 4G 31200 Mpixels/sec
Radeon HD 4790 9600 Mpixels/sec
Difference: 21600 (225%)

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 4790

Amazon.com

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Radeon R7 370 4G

Amazon.com

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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 4790 Radeon R7 370 4G
Manufacturer AMD AMD
Year 2009 June 2015
Code Name RV790 Trinidad
Memory 512 MB 4096 MB
Core Speed 600 MHz 975 MHz
Memory Speed 3200 MHz 5600 MHz
Power (Max TDP) (Unknown) watts 110 watts
Bandwidth 102400 MB/sec 179200 MB/sec
Texel Rate 19200 Mtexels/sec 62400 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 31200 Mpixels/sec
Unified Shaders 640(128x5) 1024
Texture Mapping Units 32 64
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 959 million 2080 million
Bus PCIe 2.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 4790

Amazon.com

Check prices at:

Radeon R7 370 4G

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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