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GeForce GTS 450 1GB vs Radeon HD 4850 1GB

Intro

The GeForce GTS 450 1GB comes with a clock speed of 783 MHz and a GDDR5 memory speed of 902 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 16 ROPs.

Compare all that to the Radeon HD 4850 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR4 memory works at a speed of 993 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB 106 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 4 Watts (4%)

Memory Bandwidth

In theory, the Radeon HD 4850 1GB will be 10% quicker than the GeForce GTS 450 1GB in general, due to its higher data rate. (explain)

Radeon HD 4850 1GB 63552 MB/sec
GeForce GTS 450 1GB 57728 MB/sec
Difference: 5824 (10%)

Texel Rate

The GeForce GTS 450 1GB is a little bit (about 0%) more effective at texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 56 (0%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 1GB is the winner, by a large margin. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 2528 (25%)

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 GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 4850 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

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Model GeForce GTS 450 1GB Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year September 2010 Jun 25, 2008
Code Name GF106 RV770 PRO
Memory 1024 MB 1024 MB
Core Speed 783 MHz 625 MHz
Memory Speed 3608 MHz 1986 MHz
Power (Max TDP) 106 watts 110 watts
Bandwidth 57728 MB/sec 63552 MB/sec
Texel Rate 25056 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 12528 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 956 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 maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 can be processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 4850 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

2 Responses to “GeForce GTS 450 1GB vs Radeon HD 4850 1GB”
rasel ahmed says:

all card must be given supper permanence. i think all card is excellence.if i gift the card i update my pc......................

denni says:

all 4800 series are all 256 bit ?

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