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GeForce GT 240 GDDR5 vs Radeon HD 4670 512MB

Intro

The GeForce GT 240 GDDR5 comes with a clock speed of 550 MHz and a GDDR5 memory speed of 850 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It features 96 SPUs, 32 Texture Address Units, and 8 ROPs.

Compare those specifications to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory runs at a speed of 1000 MHz on this particular card. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically, the GeForce GT 240 GDDR5 should be a lot faster than the Radeon HD 4670 512MB overall. (explain)

GeForce GT 240 GDDR5 54400 MB/sec
Radeon HD 4670 512MB 32000 MB/sec
Difference: 22400 (70%)

Texel Rate

The Radeon HD 4670 512MB will be much (more or less 36%) better at AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
GeForce GT 240 GDDR5 17600 Mtexels/sec
Difference: 6400 (36%)

Pixel Rate

The Radeon HD 4670 512MB should be quite a bit (about 36%) faster with regards to FSAA than the GeForce GT 240 GDDR5, and should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
GeForce GT 240 GDDR5 4400 Mpixels/sec
Difference: 1600 (36%)

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 240 GDDR5

Radeon HD 4670 512MB

Specifications

Display Specifications

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Model GeForce GT 240 GDDR5 Radeon HD 4670 512MB
Manufacturer nVidia AMD
Year Novermber 2009 Sep 10, 2008
Code Name GT215 RV730 XT
Memory 512 MB 512 MB
Core Speed 550 MHz 750 MHz
Memory Speed 3400 MHz 2000 MHz
Power (Max TDP) 70 watts 70 watts
Bandwidth 54400 MB/sec 32000 MB/sec
Texel Rate 17600 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 96 320(64x5)
Texture Mapping Units 32 32
Render Output Units 8 8
Bus Type GDDR5 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 289 million 514 million
Bus PCIe x16 PCIe 2.0 x16, AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across 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 DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. 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 output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

GeForce GT 240 GDDR5

Radeon HD 4670 512MB

Comments

One Response to “GeForce GT 240 GDDR5 vs Radeon HD 4670 512MB”
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