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GeForce GT 340 1GB vs Radeon HD 4770

Intro

The GeForce GT 340 1GB comes with a core clock speed of 550 MHz and a GDDR5 memory speed of 850 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 96 SPUs, 32 TAUs, and 8 ROPs.

Compare that to the Radeon HD 4770, which comes with a clock speed of 750 MHz and a GDDR5 memory frequency of 800 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB 69 Watts
Radeon HD 4770 80 Watts
Difference: 11 Watts (16%)

Memory Bandwidth

In theory, the GeForce GT 340 1GB should be 6% quicker than the Radeon HD 4770 overall, because of its higher bandwidth. (explain)

GeForce GT 340 1GB 54400 MB/sec
Radeon HD 4770 51200 MB/sec
Difference: 3200 (6%)

Texel Rate

The Radeon HD 4770 should be a lot (approximately 36%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4770 24000 Mtexels/sec
GeForce GT 340 1GB 17600 Mtexels/sec
Difference: 6400 (36%)

Pixel Rate

The Radeon HD 4770 should be much (about 173%) more effective at anti-aliasing than the GeForce GT 340 1GB, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 4770 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

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Radeon HD 4770

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 GeForce GT 340 1GB Radeon HD 4770
Manufacturer nVidia AMD
Year February 2010 Apr 28, 2009
Code Name GT215 RV740
Memory 1024 MB 512 MB
Core Speed 550 MHz 750 MHz
Memory Speed 3400 MHz 3200 MHz
Power (Max TDP) 69 watts 80 watts
Bandwidth 54400 MB/sec 51200 MB/sec
Texel Rate 17600 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 12000 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 (in units of MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the 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 clock 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GT 340 1GB

Amazon.com

Check prices at:

Radeon HD 4770

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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