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GeForce GT 340 vs Radeon HD 4750

Intro

The GeForce GT 340 has a GPU core speed of 550 MHz, and the 512 MB of GDDR5 RAM runs at 850 MHz through a 128-bit bus. It also is comprised of 96 Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the Radeon HD 4750, which uses a 40 nm design. AMD has clocked the core speed at 730 MHz. The GDDR5 RAM is set to run at a speed of 800 MHz on this particular model. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

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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

As far as performance goes, the GeForce GT 340 should in theory be just a bit superior to 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 a lot (approximately 33%) better at AF than the GeForce GT 340. (explain)

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

Pixel Rate

The Radeon HD 4750 is much (approximately 165%) faster with regards to anti-aliasing than the GeForce GT 340, and should be able to handle higher resolutions without slowing down too much. (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: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably 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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