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GeForce GT 340 1GB vs Radeon HD 4870 512MB

Intro

The GeForce GT 340 1GB has a GPU core speed of 550 MHz, and the 1024 MB of GDDR5 RAM runs at 850 MHz through a 128-bit bus. It also is made up of 96 SPUs, 32 TAUs, and 8 ROPs.

Compare those specifications to the Radeon HD 4870 512MB, which features a clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB 69 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 81 Watts (117%)

Memory Bandwidth

The Radeon HD 4870 512MB, in theory, should perform quite a bit faster than the GeForce GT 340 1GB overall. (explain)

Radeon HD 4870 512MB 115200 MB/sec
GeForce GT 340 1GB 54400 MB/sec
Difference: 60800 (112%)

Texel Rate

The Radeon HD 4870 512MB will be much (about 70%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4870 512MB 30000 Mtexels/sec
GeForce GT 340 1GB 17600 Mtexels/sec
Difference: 12400 (70%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4870 512MB is a better choice, by a large margin. (explain)

Radeon HD 4870 512MB 12000 Mpixels/sec
GeForce GT 340 1GB 4400 Mpixels/sec
Difference: 7600 (173%)

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 1GB

Amazon.com

Check prices at:

Radeon HD 4870 512MB

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 1GB Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year February 2010 Jun 25, 2008
Code Name GT215 RV770 XT
Memory 1024 MB 512 MB
Core Speed 550 MHz 750 MHz
Memory Speed 3400 MHz 3600 MHz
Power (Max TDP) 69 watts 150 watts
Bandwidth 54400 MB/sec 115200 MB/sec
Texel Rate 17600 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 96 800(160x5)
Texture Mapping Units 32 40
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 727 million 956 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 largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GT 340 1GB

Amazon.com

Check prices at:

Radeon HD 4870 512MB

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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