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GeForce GT 315 vs Radeon HD 4650 1GB

Intro

The GeForce GT 315 has a clock frequency of 625 MHz and a DDR3 memory speed of 790 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 48 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare those specs to the Radeon HD 4650 1GB, which features a core clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also uses a 128-bit bus, and makes use of 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 315 52 Watts
Radeon HD 4650 1GB 55 Watts
Difference: 3 Watts (6%)

Memory Bandwidth

In theory, the GeForce GT 315 should perform a little bit faster than the Radeon HD 4650 1GB overall. (explain)

GeForce GT 315 25280 MB/sec
Radeon HD 4650 1GB 22400 MB/sec
Difference: 2880 (13%)

Texel Rate

The Radeon HD 4650 1GB should be a lot (more or less 92%) faster with regards to AF than the GeForce GT 315. (explain)

Radeon HD 4650 1GB 19200 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 9200 (92%)

Pixel Rate

The GeForce GT 315 is a little bit (approximately 4%) more effective at AA than the Radeon HD 4650 1GB, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GT 315 5000 Mpixels/sec
Radeon HD 4650 1GB 4800 Mpixels/sec
Difference: 200 (4%)

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 315

Amazon.com

Check prices at:

Radeon HD 4650 1GB

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 315 Radeon HD 4650 1GB
Manufacturer nVidia AMD
Year November 2009 Sep 10, 2008
Code Name GT216 RV730 PRO
Memory 512 MB 1024 MB
Core Speed 625 MHz 600 MHz
Memory Speed 1580 MHz 1400 MHz
Power (Max TDP) 52 watts 55 watts
Bandwidth 25280 MB/sec 22400 MB/sec
Texel Rate 10000 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 4800 Mpixels/sec
Unified Shaders 48 320(64x5)
Texture Mapping Units 16 32
Render Output Units 8 8
Bus Type DDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 486 million 514 million
Bus PCIe 2.0 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card 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 amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GT 315

Amazon.com

Check prices at:

Radeon HD 4650 1GB

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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