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GeForce GTX 295 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 295 makes use of a 55 nm design. nVidia has clocked the core speed at 576 MHz. The GDDR3 memory runs at a speed of 999 MHz on this specific card. It features 240 SPUs as well as 80 TAUs and 28 Rasterization Operator Units.

Compare all that to the Radeon HD 3870 X2 1GB, which has GPU clock speed of 825 MHz, and 1024 MB of GDDR4 RAM running at 1126 MHz through a 256-bit bus. It also features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 295 should in theory be a lot better than the Radeon HD 3870 X2 1GB in general. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 3870 X2 1GB 144128 MB/sec
Difference: 79648 (55%)

Texel Rate

The GeForce GTX 295 will be quite a bit (more or less 249%) faster with regards to texture filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 65760 (249%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 295 is the winner, by a large margin. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 5856 (22%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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 295 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year January 8, 2009 Jan 28, 2008
Code Name G200b R680
Memory 896 MB (x2) 1024 MB (x2)
Core Speed 576 MHz (x2) 825 MHz (x2)
Memory Speed 1998 MHz (x2) 2252 MHz (x2)
Power (Max TDP) 289 watts (Unknown) watts
Bandwidth 223776 MB/sec 144128 MB/sec
Texel Rate 92160 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 240 (x2) 320(64x5) (x2)
Texture Mapping Units 80 (x2) 16 (x2)
Render Output Units 28 (x2) 16 (x2)
Bus Type GDDR3 GDDR4
Bus Width 448-bit (x2) 256-bit (x2)
Fab Process 55 nm 55 nm
Transistors 1400 million (Unknown) million
Bus PCIe x16 2.0 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

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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