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GeForce GTS 250 1GB vs Radeon HD 7870


Intro

The GeForce GTS 250 1GB features clock speeds of 738 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR3 memory. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 7870, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this card. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB 145 Watts
Radeon HD 7870 175 Watts
Difference: 30 Watts (21%)

Memory Bandwidth

The Radeon HD 7870, in theory, should perform a lot faster than the GeForce GTS 250 1GB in general. (explain)

Radeon HD 7870 153600 MB/sec
GeForce GTS 250 1GB 70400 MB/sec
Difference: 83200 (118%)

Texel Rate

The Radeon HD 7870 is a lot (about 69%) faster with regards to AF than the GeForce GTS 250 1GB. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTS 250 1GB 47232 Mtexels/sec
Difference: 32768 (69%)

Pixel Rate

The Radeon HD 7870 is a lot (about 171%) better at anti-aliasing than the GeForce GTS 250 1GB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GTS 250 1GB 11808 Mpixels/sec
Difference: 20192 (171%)

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 GTS 250 1GB

Radeon HD 7870

Specifications

Display Specifications

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Model GeForce GTS 250 1GB Radeon HD 7870
Manufacturer nVidia AMD
Year March 3, 2009 March 2012
Code Name G92a/b Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 738 MHz 1000 MHz
Memory Speed 2200 MHz 4800 MHz
Power (Max TDP) 145 watts 175 watts
Bandwidth 70400 MB/sec 153600 MB/sec
Texel Rate 47232 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 128 1280
Texture Mapping Units 64 80
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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core 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 in a second.

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

GeForce GTS 250 1GB

Radeon HD 7870

Comments

One Response to “GeForce GTS 250 1GB vs Radeon HD 7870”
Orhan says:

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