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GeForce GTX 295 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 295 has core speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs along with 80 TAUs and 28 Rasterization Operator Units.

Compare those specs to the Radeon HD 4850 X2 1GB, which comes with GPU clock speed of 625 MHz, and 1024 MB of GDDR3 RAM set to run at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 X2 1GB 250 Watts
GeForce GTX 295 289 Watts
Difference: 39 Watts (16%)

Memory Bandwidth

Theoretically, the GeForce GTX 295 should be a lot faster than the Radeon HD 4850 X2 1GB overall. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 4850 X2 1GB 127104 MB/sec
Difference: 96672 (76%)

Texel Rate

The GeForce GTX 295 will be a lot (about 84%) more effective at AF than the Radeon HD 4850 X2 1GB. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 42160 (84%)

Pixel Rate

The GeForce GTX 295 will be much (approximately 61%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 X2 1GB, and should be able to handle higher resolutions better. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 4850 X2 1GB 20000 Mpixels/sec
Difference: 12256 (61%)

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 4850 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 4850 X2 1GB
Manufacturer nVidia AMD
Year January 8, 2009 Nov 7, 2008
Code Name G200b R700
Memory 896 MB (x2) 1024 MB (x2)
Core Speed 576 MHz (x2) 625 MHz (x2)
Memory Speed 1998 MHz (x2) 1986 MHz (x2)
Power (Max TDP) 289 watts 250 watts
Bandwidth 223776 MB/sec 127104 MB/sec
Texel Rate 92160 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 240 (x2) 800(160x5) (x2)
Texture Mapping Units 80 (x2) 40 (x2)
Render Output Units 28 (x2) 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 448-bit (x2) 256-bit (x2)
Fab Process 55 nm 55 nm
Transistors 1400 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR 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 by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 4850 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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