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GeForce GT 315 vs Radeon HD 7750

Intro

The GeForce GT 315 comes with a GPU core speed of 625 MHz, and the 512 MB of DDR3 memory runs at 790 MHz through a 128-bit bus. It also features 48 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare that to the Radeon HD 7750, which features core speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315 52 Watts
Radeon HD 7750 55 Watts
Difference: 3 Watts (6%)

Memory Bandwidth

In theory, the Radeon HD 7750 is 185% faster than the GeForce GT 315 overall, because of its higher bandwidth. (explain)

Radeon HD 7750 72000 MB/sec
GeForce GT 315 25280 MB/sec
Difference: 46720 (185%)

Texel Rate

The Radeon HD 7750 will be much (approximately 156%) more effective at anisotropic filtering than the GeForce GT 315. (explain)

Radeon HD 7750 25600 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 15600 (156%)

Pixel Rate

The Radeon HD 7750 should be a lot (more or less 156%) more effective at anti-aliasing than the GeForce GT 315, and also will be able to handle higher resolutions better. (explain)

Radeon HD 7750 12800 Mpixels/sec
GeForce GT 315 5000 Mpixels/sec
Difference: 7800 (156%)

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 7750

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 7750
Manufacturer nVidia AMD
Year November 2009 February 2012
Code Name GT216 Cape Verde Pro
Memory 512 MB 1024 MB
Core Speed 625 MHz 800 MHz
Memory Speed 1580 MHz 4500 MHz
Power (Max TDP) 52 watts 55 watts
Bandwidth 25280 MB/sec 72000 MB/sec
Texel Rate 10000 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 48 512
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type DDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 486 million 1500 million
Bus PCIe 2.0 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core clock 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 its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the 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 7750

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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