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GeForce GTX 285 1GB vs Radeon HD 7870

Intro

The GeForce GTX 285 1GB comes with core speeds of 648 MHz on the GPU, and 1242 MHz on the 1024 MB of GDDR3 RAM. It features 240 SPUs along with 80 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 7870, which features core speeds of 1000 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 175 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 29 Watts (17%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB should be a small bit faster than the Radeon HD 7870 overall. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 5376 (4%)

Texel Rate

The Radeon HD 7870 should be much (more or less 54%) better at anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 28160 (54%)

Pixel Rate

The Radeon HD 7870 will be much (approximately 54%) faster with regards to full screen anti-aliasing than the GeForce GTX 285 1GB, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 11264 (54%)

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 285 1GB

Amazon.com

Check prices at:

Radeon HD 7870

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 GTX 285 1GB Radeon HD 7870
Manufacturer nVidia AMD
Year January 15, 2009 March 2012
Code Name G200b Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 648 MHz 1000 MHz
Memory Speed 2484 MHz 4800 MHz
Power (Max TDP) 204 watts 175 watts
Bandwidth 158976 MB/sec 153600 MB/sec
Texel Rate 51840 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 240 1280
Texture Mapping Units 80 80
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 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 largest amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video 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 amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7870

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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