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GeForce GTS 150 vs Radeon HD 3650 256MB

Intro

The GeForce GTS 150 comes with a clock frequency of 740 MHz and a GDDR3 memory frequency of 500 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is comprised of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 3650 256MB, which makes use of a 55 nm design. AMD has clocked the core speed at 725 MHz. The DDR2 memory runs at a frequency of 800 MHz on this card. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 256MB 78 Watts
GeForce GTS 150 141 Watts
Difference: 63 Watts (81%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 150 is 25% quicker than the Radeon HD 3650 256MB overall, due to its higher bandwidth. (explain)

GeForce GTS 150 32000 MB/sec
Radeon HD 3650 256MB 25600 MB/sec
Difference: 6400 (25%)

Texel Rate

The GeForce GTS 150 will be quite a bit (more or less 717%) more effective at AF than the Radeon HD 3650 256MB. (explain)

GeForce GTS 150 47360 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 41560 (717%)

Pixel Rate

The GeForce GTS 150 should be much (more or less 308%) more effective at AA than the Radeon HD 3650 256MB, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTS 150 11840 Mpixels/sec
Radeon HD 3650 256MB 2900 Mpixels/sec
Difference: 8940 (308%)

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 150

Amazon.com

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Radeon HD 3650 256MB

Amazon.com

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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 150 Radeon HD 3650 256MB
Manufacturer nVidia AMD
Year March 10, 2009 2008
Code Name G92b RV635 PRO
Memory 1024 MB 256 MB
Core Speed 740 MHz 725 MHz
Memory Speed 1000 MHz 1600 MHz
Power (Max TDP) 141 watts 78 watts
Bandwidth 32000 MB/sec 25600 MB/sec
Texel Rate 47360 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 11840 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 128 120(24x5)
Texture Mapping Units 64 8
Render Output Units 16 4
Bus Type GDDR3 DDR2
Bus Width 256-bit 128-bit
Fab Process 55 nm 55 nm
Transistors 754 million (Unknown) million
Bus PCIe x16 2.0 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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

Display Prices

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GeForce GTS 150

Amazon.com

Check prices at:

Radeon HD 3650 256MB

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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