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GeForce GTX 465 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 465 uses a 40 nm design. nVidia has clocked the core frequency at 607 MHz. The GDDR5 memory is set to run at a speed of 802 MHz on this specific model. It features 352 SPUs along with 44 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 4890 2GB, which has a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 975 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 2GB 190 Watts
GeForce GTX 465 200 Watts
Difference: 10 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4890 2GB should be 22% quicker than the GeForce GTX 465 in general, because of its greater data rate. (explain)

Radeon HD 4890 2GB 124800 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 22208 (22%)

Texel Rate

The Radeon HD 4890 2GB will be much (more or less 50%) more effective at texture filtering than the GeForce GTX 465. (explain)

Radeon HD 4890 2GB 40000 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 13292 (50%)

Pixel Rate

The GeForce GTX 465 is quite a bit (approximately 21%) faster with regards to full screen anti-aliasing than the Radeon HD 4890 2GB, and should be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 465 19424 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 3424 (21%)

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

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GeForce GTX 465

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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 465 Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year May 2010 Apr 2, 2009
Code Name GF100 RV790 XT
Memory 1024 MB 2048 MB
Core Speed 607 MHz 1000 MHz
Memory Speed 3208 MHz 3900 MHz
Power (Max TDP) 200 watts 190 watts
Bandwidth 102592 MB/sec 124800 MB/sec
Texel Rate 26708 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 352 800(160x5)
Texture Mapping Units 44 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 3000 million 959 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 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 this number, the better the video 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 number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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 465

Amazon.com

Check prices at:

Radeon HD 4890 2GB

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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