Compare any two graphics cards:
VS

GeForce GTX 275 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 275 has a GPU core clock speed of 633 MHz, and the 896 MB of GDDR3 memory runs at 1134 MHz through a 448-bit bus. It also is comprised of 240 Stream Processors, 80 TAUs, and 28 Raster Operation Units.

Compare those specs to the Radeon HD 4850 X2 512MB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory works at a frequency of 993 MHz on this particular model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275 219 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 31 Watts (14%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 512MB should in theory be just a bit better than the GeForce GTX 275 overall. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 96 (0%)

Texel Rate

The GeForce GTX 275 should be a small bit (approximately 1%) faster with regards to texture filtering than the Radeon HD 4850 X2 512MB. (explain)

GeForce GTX 275 50640 Mtexels/sec
Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Difference: 640 (1%)

Pixel Rate

The Radeon HD 4850 X2 512MB should be just a bit (about 13%) more effective at anti-aliasing than the GeForce GTX 275, and also able to handle higher resolutions while still performing well. (explain)

Radeon HD 4850 X2 512MB 20000 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 2276 (13%)

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

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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

Display Specifications

Hide Specifications

Model GeForce GTX 275 Radeon HD 4850 X2 512MB
Manufacturer nVidia AMD
Year April 9, 2009 Nov 7, 2008
Code Name G200b R700
Memory 896 MB 512 MB (x2)
Core Speed 633 MHz 625 MHz (x2)
Memory Speed 2268 MHz 1986 MHz (x2)
Power (Max TDP) 219 watts 250 watts
Bandwidth 127008 MB/sec 127104 MB/sec
Texel Rate 50640 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 240 800(160x5) (x2)
Texture Mapping Units 80 40 (x2)
Render Output Units 28 16 (x2)
Bus Type GDDR3 GDDR3
Bus Width 448-bit 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 max amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon HD 4850 X2 512MB

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.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield