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GeForce GTX 275 vs Radeon HD 7750


Intro

The GeForce GTX 275 has a clock speed of 633 MHz and a GDDR3 memory speed of 1134 MHz. It also makes use of a 448-bit bus, and uses a 55 nm design. It features 240 SPUs, 80 TAUs, and 28 Raster Operation Units.

Compare those specs to the Radeon HD 7750, which has core speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce GTX 275 219 Watts
Difference: 164 Watts (298%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 should be a lot faster than the Radeon HD 7750 overall. (explain)

GeForce GTX 275 127008 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 55008 (76%)

Texel Rate

The GeForce GTX 275 should be quite a bit (about 98%) faster with regards to texture filtering than the Radeon HD 7750. (explain)

GeForce GTX 275 50640 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 25040 (98%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 275 is the winner, by a large margin. (explain)

GeForce GTX 275 17724 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 4924 (38%)

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 GTX 275

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

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Model GeForce GTX 275 Radeon HD 7750
Manufacturer nVidia AMD
Year April 9, 2009 February 2012
Code Name G200b Cape Verde Pro
Memory 896 MB 1024 MB
Core Speed 633 MHz 800 MHz
Memory Speed 2268 MHz 4500 MHz
Power (Max TDP) 219 watts 55 watts
Bandwidth 127008 MB/sec 72000 MB/sec
Texel Rate 50640 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 240 512
Texture Mapping Units 80 32
Render Output Units 28 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 1500 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 275

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.

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