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GeForce 9800 GT 1GB vs Radeon HD 7750


Intro

The GeForce 9800 GT 1GB makes use of a 65/55 nm design. nVidia has clocked the core speed at 600 MHz. The GDDR3 memory runs at a speed of 900 MHz on this particular card. It features 112 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon HD 7750, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is comprised of 512 Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
GeForce 9800 GT 1GB 105 Watts
Difference: 50 Watts (91%)

Memory Bandwidth

Theoretically, the Radeon HD 7750 should be much faster than the GeForce 9800 GT 1GB in general. (explain)

Radeon HD 7750 72000 MB/sec
GeForce 9800 GT 1GB 57600 MB/sec
Difference: 14400 (25%)

Texel Rate

The GeForce 9800 GT 1GB will be quite a bit (about 31%) better at anisotropic filtering than the Radeon HD 7750. (explain)

GeForce 9800 GT 1GB 33600 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 8000 (31%)

Pixel Rate

The Radeon HD 7750 should be much (more or less 33%) better at anti-aliasing than the GeForce 9800 GT 1GB, and able to handle higher resolutions while still performing well. (explain)

Radeon HD 7750 12800 Mpixels/sec
GeForce 9800 GT 1GB 9600 Mpixels/sec
Difference: 3200 (33%)

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 9800 GT 1GB

Radeon HD 7750

Specifications

Display Specifications

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Model GeForce 9800 GT 1GB Radeon HD 7750
Manufacturer nVidia AMD
Year July 2008 February 2012
Code Name G92a/b Cape Verde Pro
Memory 1024 MB 1024 MB
Core Speed 600 MHz 800 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 105 watts 55 watts
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 33600 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 112 512
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 28 nm
Transistors 754 million 1500 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 get to the max fill rate.

GeForce 9800 GT 1GB

Radeon HD 7750

Comments

2 Responses to “GeForce 9800 GT 1GB vs Radeon HD 7750”
AMDFTW says:

Very close
but the HD7750 took the cake

victor says:

9800GT have more performance again textures? i dont know...

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