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GeForce GTX 295 vs Radeon HD 4870 1GB

Intro

The GeForce GTX 295 features a core clock speed of 576 MHz and a GDDR3 memory speed of 999 MHz. It also uses a 448-bit memory bus, and makes use of a 55 nm design. It features 240 SPUs, 80 TAUs, and 28 ROPs.

Compare those specs to the Radeon HD 4870 1GB, which has clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB 150 Watts
GeForce GTX 295 289 Watts
Difference: 139 Watts (93%)

Memory Bandwidth

The GeForce GTX 295 should theoretically be a lot faster than the Radeon HD 4870 1GB overall. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 4870 1GB 115200 MB/sec
Difference: 108576 (94%)

Texel Rate

The GeForce GTX 295 is quite a bit (more or less 207%) better at AF than the Radeon HD 4870 1GB. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 62160 (207%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 295 is a better choice, by far. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 20256 (169%)

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 4870 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 4870 1GB
Manufacturer nVidia AMD
Year January 8, 2009 Jun 25, 2008
Code Name G200b RV770 XT
Memory 896 MB (x2) 1024 MB
Core Speed 576 MHz (x2) 750 MHz
Memory Speed 1998 MHz (x2) 3600 MHz
Power (Max TDP) 289 watts 150 watts
Bandwidth 223776 MB/sec 115200 MB/sec
Texel Rate 92160 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 240 (x2) 800(160x5)
Texture Mapping Units 80 (x2) 40
Render Output Units 28 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit (x2) 256-bit
Fab Process 55 nm 55 nm
Transistors 1400 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number 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 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. The number is worked out by multiplying the amount of Render Output Units 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 rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 4870 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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