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GeForce GT 340 vs Radeon HD 4750

Intro

The GeForce GT 340 comes with a core clock speed of 550 MHz and a GDDR5 memory speed of 850 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 96 SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the Radeon HD 4750, which has GPU core speed of 730 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 128-bit bus. It also features 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
Radeon HD 4750 75 Watts
Difference: 6 Watts (9%)

Memory Bandwidth

The GeForce GT 340 should theoretically perform just a bit faster than the Radeon HD 4750 overall. (explain)

GeForce GT 340 54400 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 3200 (6%)

Texel Rate

The Radeon HD 4750 will be quite a bit (about 33%) better at texture filtering than the GeForce GT 340. (explain)

Radeon HD 4750 23360 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 5760 (33%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4750 is a better choice, by a large margin. (explain)

Radeon HD 4750 11680 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 7280 (165%)

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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GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 4750

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

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Model GeForce GT 340 Radeon HD 4750
Manufacturer nVidia AMD
Year February 2010
Code Name GT215 RV740
Memory 512 MB 512 MB
Core Speed 550 MHz 730 MHz
Memory Speed 3400 MHz 3200 MHz
Power (Max TDP) 69 watts 75 watts
Bandwidth 54400 MB/sec 51200 MB/sec
Texel Rate 17600 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 96 640(128x5)
Texture Mapping Units 32 32
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 727 million 826 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

Display Prices

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GeForce GT 340

Amazon.com

Check prices at:

Radeon HD 4750

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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