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GeForce 9800 GT 1GB vs Radeon HD 7750

Intro

The GeForce 9800 GT 1GB has core clock speeds of 600 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 112 SPUs as well as 56 Texture Address Units and 16 ROPs.

Compare that to the Radeon HD 7750, which makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this card. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

(No game benchmarks for this combination yet.)

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 perform a lot faster than the GeForce 9800 GT 1GB overall. (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 a lot (more or less 31%) more effective at texture 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

If running with high levels of AA is important to you, then the Radeon HD 7750 is the winner, by far. (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

Amazon.com

Radeon HD 7750

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 9800 GT 1GB Radeon HD 7750
Manufacturer nVidia AMD
Year July 2008 February 2012
Code Name G92a/b Cape Verde Pro
Fab Process 65/55 nm 28 nm
Bus PCIe x16 2.0 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 600 MHz 800 MHz
Shader Speed 1500 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 112 512
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2
Power (Max TDP) 105 watts 55 watts
Shader Model 4.0 5.0
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 33600 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 12800 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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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