Compare any two graphics cards:
VS

GeForce GTX 275 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 275 comes with a core clock speed of 633 MHz and a GDDR3 memory speed of 1134 MHz. It also uses a 448-bit bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 Texture Address Units, and 28 ROPs.

Compare those specifications to the Radeon HD 4890 1GB, which features core clock speeds of 1000 MHz on the GPU, and 975 MHz on the 1024 MB of GDDR5 memory. 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)

Radeon HD 4890 1GB 190 Watts
GeForce GTX 275 219 Watts
Difference: 29 Watts (15%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 is 2% faster than the Radeon HD 4890 1GB in general, due to its greater data rate. (explain)

GeForce GTX 275 127008 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 2208 (2%)

Texel Rate

The GeForce GTX 275 should be quite a bit (more or less 27%) better at AF than the Radeon HD 4890 1GB. (explain)

GeForce GTX 275 50640 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 10640 (27%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 275 is the winner, but not by far. (explain)

GeForce GTX 275 17724 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 1724 (11%)

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.

Price Comparison

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon HD 4890 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

Display Specifications

Hide Specifications

Model GeForce GTX 275 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year April 9, 2009 Apr 2, 2009
Code Name G200b RV790 XT
Memory 896 MB 1024 MB
Core Speed 633 MHz 1000 MHz
Memory Speed 2268 MHz 3900 MHz
Power (Max TDP) 219 watts 190 watts
Bandwidth 127008 MB/sec 124800 MB/sec
Texel Rate 50640 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 240 800(160x5)
Texture Mapping Units 80 40
Render Output Units 28 16
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit
Fab Process 55 nm 55 nm
Transistors 1400 million 959 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 (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 275

Amazon.com

Check prices at:

Radeon HD 4890 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.

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