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GeForce GTS 250 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

The GeForce GTS 250 512MB comes with a GPU clock speed of 738 MHz, and the 512 MB of GDDR3 memory is set to run at 1100 MHz through a 256-bit bus. It also is comprised of 128 SPUs, 64 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6570 (OEM) 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 650 MHz. The GDDR3 RAM works at a frequency of 900 MHz on this specific card. It features 480 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB 50 Watts
GeForce GTS 250 512MB 145 Watts
Difference: 95 Watts (190%)

Memory Bandwidth

The GeForce GTS 250 512MB, in theory, should be a lot faster than the Radeon HD 6570 (OEM) 1GB in general. (explain)

GeForce GTS 250 512MB 70400 MB/sec
Radeon HD 6570 (OEM) 1GB 28800 MB/sec
Difference: 41600 (144%)

Texel Rate

The GeForce GTS 250 512MB is a lot (more or less 203%) faster with regards to anisotropic filtering than the Radeon HD 6570 (OEM) 1GB. (explain)

GeForce GTS 250 512MB 47232 Mtexels/sec
Radeon HD 6570 (OEM) 1GB 15600 Mtexels/sec
Difference: 31632 (203%)

Pixel Rate

The GeForce GTS 250 512MB should be a lot (more or less 127%) more effective at anti-aliasing than the Radeon HD 6570 (OEM) 1GB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTS 250 512MB 11808 Mpixels/sec
Radeon HD 6570 (OEM) 1GB 5200 Mpixels/sec
Difference: 6608 (127%)

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

Radeon HD 6570 (OEM) 1GB

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 GTS 250 512MB Radeon HD 6570 (OEM) 1GB
Manufacturer nVidia AMD
Year March 3, 2009 February 2011
Code Name G92a/b Turks
Memory 512 MB 1024 MB
Core Speed 738 MHz 650 MHz
Memory Speed 2200 MHz 1800 MHz
Power (Max TDP) 145 watts 50 watts
Bandwidth 70400 MB/sec 28800 MB/sec
Texel Rate 47232 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 11808 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 128 480
Texture Mapping Units 64 24
Render Output Units 16 8
Bus Type GDDR3 GDDR3
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 40 nm
Transistors 754 million 715 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out 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 applied per second.

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

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