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GeForce GT 315 vs Radeon HD 4650 1GB

Intro

The GeForce GT 315 comes with core clock speeds of 625 MHz on the GPU, and 790 MHz on the 512 MB of DDR3 memory. It features 48 SPUs along with 16 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 4650 1GB, which features core speeds of 600 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator 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 be 13% faster than the Radeon HD 4650 1GB overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon HD 4650 1GB will be a lot (approximately 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 small bit (approximately 4%) better at full screen anti-aliasing than the Radeon HD 4650 1GB, and will be able to handle higher screen resolutions without slowing down too much. (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 maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 are applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

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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