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GeForce GTX 460 vs Radeon HD 7750

Intro

The GeForce GTX 460 comes with a core clock speed of 675 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 192-bit memory bus, and uses a 40 nm design. It is comprised of 336 SPUs, 56 TAUs, and 24 ROPs.

Compare those specs to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM runs at a speed of 1125 MHz on this particular card. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce GTX 460 150 Watts
Difference: 95 Watts (173%)

Memory Bandwidth

The GeForce GTX 460 should in theory be a bit faster than the Radeon HD 7750 in general. (explain)

GeForce GTX 460 86400 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 14400 (20%)

Texel Rate

The GeForce GTX 460 is much (about 48%) better at AF than the Radeon HD 7750. (explain)

GeForce GTX 460 37800 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 12200 (48%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 460 is the winner, by a large margin. (explain)

GeForce GTX 460 16200 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 3400 (27%)

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

GeForce GTX 460

Amazon.com

Radeon HD 7750

Amazon.com

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

Model GeForce GTX 460 Radeon HD 7750
Manufacturer nVidia AMD
Year July 2010 February 2012
Code Name GF104 Cape Verde Pro
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 768 MB 1024 MB
Core Speed 675 MHz 800 MHz
Shader Speed 1350 MHz (N/A) MHz
Memory Speed 900 MHz (3600 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 336 512
Texture Mapping Units 56 32
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 150 watts 55 watts
Shader Model 5.0 5.0
Bandwidth 86400 MB/sec 72000 MB/sec
Texel Rate 37800 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 12800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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