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GeForce GTX 295 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 295 features core clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 240 SPUs as well as 80 TAUs and 28 ROPs.

Compare that to the Radeon HD 4850 X2 1GB, which comes with clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 memory. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator 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

As far as performance goes, the GeForce GTX 295 should theoretically be much superior to 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 is quite a bit (more or less 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 a lot (about 61%) faster with regards to FSAA 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: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 potential to reach 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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