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GeForce GTX 285 1GB vs Radeon HD 7870 XT

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 memory works at a speed of 1242 MHz on this card. It features 240 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon HD 7870 XT, which features clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 19 Watts (10%)

Memory Bandwidth

Performance-wise, the Radeon HD 7870 XT should theoretically be much superior to the GeForce GTX 285 1GB overall. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce GTX 285 1GB 158976 MB/sec
Difference: 33024 (21%)

Texel Rate

The Radeon HD 7870 XT is a lot (about 71%) more effective at texture filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 36960 (71%)

Pixel Rate

The Radeon HD 7870 XT should be quite a bit (about 43%) more effective at FSAA than the GeForce GTX 285 1GB, and also able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 8864 (43%)

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 XT

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 XT
Manufacturer nVidia AMD
Year January 15, 2009 November 2012
Code Name G200b Tahiti LE
Memory 1024 MB 2048 MB
Core Speed 648 MHz 925 MHz
Memory Speed 2484 MHz 6000 MHz
Power (Max TDP) 204 watts 185 watts
Bandwidth 158976 MB/sec 192000 MB/sec
Texel Rate 51840 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 240 1536
Texture Mapping Units 80 96
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 worked out by multiplying the amount of ROPs by the the core 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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