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GeForce GTS 250 512MB vs Radeon HD 7850

Intro

The GeForce GTS 250 512MB features core clock speeds of 738 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 7850, which has clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 15 Watts (12%)

Memory Bandwidth

In theory, the Radeon HD 7850 is 118% quicker than the GeForce GTS 250 512MB in general, due to its greater data rate. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GTS 250 512MB 70400 MB/sec
Difference: 83200 (118%)

Texel Rate

The Radeon HD 7850 is a small bit (about 17%) faster with regards to anisotropic filtering than the GeForce GTS 250 512MB. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GTS 250 512MB 47232 Mtexels/sec
Difference: 7808 (17%)

Pixel Rate

The Radeon HD 7850 will be a lot (about 133%) faster with regards to FSAA than the GeForce GTS 250 512MB, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GTS 250 512MB 11808 Mpixels/sec
Difference: 15712 (133%)

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 GTS 250 512MB

Amazon.com

Check prices at:

Radeon HD 7850

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 GTS 250 512MB Radeon HD 7850
Manufacturer nVidia AMD
Year March 3, 2009 March 2012
Code Name G92a/b Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 738 MHz 860 MHz
Memory Speed 2200 MHz 4800 MHz
Power (Max TDP) 145 watts 130 watts
Bandwidth 70400 MB/sec 153600 MB/sec
Texel Rate 47232 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 128 1024
Texture Mapping Units 64 64
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 65/55 nm 28 nm
Transistors 754 million 2800 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: Bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTS 250 512MB

Amazon.com

Check prices at:

Radeon HD 7850

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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