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GeForce GT 310 vs Radeon HD 4650 512MB

Intro

The GeForce GT 310 comes with core speeds of 589 MHz on the GPU, and 1000 MHz on the 512 MB of DDR2 memory. It features 16 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4650 512MB, which has a core clock speed of 600 MHz and a DDR2 memory frequency of 500 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 310 31 Watts
Radeon HD 4650 512MB 55 Watts
Difference: 24 Watts (77%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The Radeon HD 4650 512MB should be much (about 307%) better at texture filtering than the GeForce GT 310. (explain)

Radeon HD 4650 512MB 19200 Mtexels/sec
GeForce GT 310 4712 Mtexels/sec
Difference: 14488 (307%)

Pixel Rate

The Radeon HD 4650 512MB will be much (about 104%) more effective at FSAA than the GeForce GT 310, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 4650 512MB 4800 Mpixels/sec
GeForce GT 310 2356 Mpixels/sec
Difference: 2444 (104%)

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 310

Amazon.com

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Radeon HD 4650 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 310 Radeon HD 4650 512MB
Manufacturer nVidia AMD
Year November 2009 Sep 10, 2008
Code Name GT218 RV730 PRO
Memory 512 MB 512 MB
Core Speed 589 MHz 600 MHz
Memory Speed 2000 MHz 1000 MHz
Power (Max TDP) 31 watts 55 watts
Bandwidth 16000 MB/sec 16000 MB/sec
Texel Rate 4712 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 2356 Mpixels/sec 4800 Mpixels/sec
Unified Shaders 16 320(64x5)
Texture Mapping Units 8 32
Render Output Units 4 8
Bus Type DDR2 DDR2
Bus Width 64-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 260 million 514 million
Bus PCIe 2.0 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GT 310

Amazon.com

Check prices at:

Radeon HD 4650 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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