Compare any two graphics cards:
VS

GeForce GTX 650 Ti 2GB vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 650 Ti 2GB has a clock speed of 928 MHz and a GDDR5 memory frequency of 1350 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is comprised of 768 SPUs, 64 TAUs, and 16 ROPs.

Compare all of that to the Radeon HD 3870 X2 1GB, which features a GPU core clock speed of 825 MHz, and 1024 MB of GDDR4 memory set to run at 1126 MHz through a 256-bit bus. It also is comprised of 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3870 X2 1GB will be 67% quicker than the GeForce GTX 650 Ti 2GB in general, due to its higher data rate. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 650 Ti 2GB 86400 MB/sec
Difference: 57728 (67%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be a lot (approximately 125%) better at texture filtering than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 650 Ti 2GB 59392 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 32992 (125%)

Pixel Rate

The Radeon HD 3870 X2 1GB is quite a bit (approximately 78%) faster with regards to FSAA than the GeForce GTX 650 Ti 2GB, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
GeForce GTX 650 Ti 2GB 14848 Mpixels/sec
Difference: 11552 (78%)

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 650 Ti 2GB

Amazon.com

Check prices at:

Radeon HD 3870 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

Display Specifications

Hide Specifications

Model GeForce GTX 650 Ti 2GB Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year October 2012 Jan 28, 2008
Code Name GK106 R680
Memory 2048 MB 1024 MB (x2)
Core Speed 928 MHz 825 MHz (x2)
Memory Speed 5400 MHz 2252 MHz (x2)
Power (Max TDP) 110 watts (Unknown) watts
Bandwidth 86400 MB/sec 144128 MB/sec
Texel Rate 59392 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 768 320(64x5) (x2)
Texture Mapping Units 64 16 (x2)
Render Output Units 16 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 2540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 650 Ti 2GB

Amazon.com

Check prices at:

Radeon HD 3870 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.

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