Join Us On Facebook

Compare any two graphics cards:
VS

GeForce GT 450 (OEM) vs Radeon HD 7870

Intro

The GeForce GT 450 (OEM) features core clock speeds of 790 MHz on the GPU, and 1000 MHz on the 1536 MB of GDDR5 RAM. It features 144 SPUs along with 24 TAUs and 24 ROPs.

Compare those specs to the Radeon HD 7870, which has GPU core speed of 1000 MHz, and 2048 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also features 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM) 106 Watts
Radeon HD 7870 175 Watts
Difference: 69 Watts (65%)

Memory Bandwidth

Performance-wise, the Radeon HD 7870 should theoretically be much better than the GeForce GT 450 (OEM) in general. (explain)

Radeon HD 7870 153600 MB/sec
GeForce GT 450 (OEM) 96000 MB/sec
Difference: 57600 (60%)

Texel Rate

The Radeon HD 7870 should be quite a bit (more or less 322%) better at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GT 450 (OEM) 18960 Mtexels/sec
Difference: 61040 (322%)

Pixel Rate

The Radeon HD 7870 should be quite a bit (about 69%) more effective at FSAA than the GeForce GT 450 (OEM), and also will be capable of handling higher resolutions better. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GT 450 (OEM) 18960 Mpixels/sec
Difference: 13040 (69%)

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

GeForce GT 450 (OEM)

Amazon.com

Radeon HD 7870

Amazon.com

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

Model GeForce GT 450 (OEM) Radeon HD 7870
Manufacturer nVidia AMD
Year October 2010 March 2012
Code Name GF106 Pitcairn XT
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1536 MB 2048 MB
Core Speed 790 MHz 1000 MHz
Shader Speed 1580 MHz (N/A) MHz
Memory Speed 1000 MHz (4000 MHz effective) 1200 MHz (4800 MHz effective)
Unified Shaders 144 1280
Texture Mapping Units 24 80
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 106 watts 175 watts
Shader Model 5.0 5.0
Bandwidth 96000 MB/sec 153600 MB/sec
Texel Rate 18960 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 18960 Mpixels/sec 32000 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It's 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 it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Comments

Be the first to leave a comment!

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Spam Protection by WP-SpamFree