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The GeForce 7900 GT
The GeForce 7900 GT is essentially a slower version of the GeForce 7900 GTX. Targeted at the ATI Radeon X1800 XL and X1800 GTO, the GeForce 7900 GT will boast a target price range of USD 249 to USD 399.
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) |
GPU top |
GPU interface |
Take a look at its basic specifications :
| Architecture | G71 |
| Process Technology | 90 nm |
| Number of Transistors | 278 Million |
| Die Size | 196 mm2 |
| Pixel Pipelines | 24 Pixel
Pipelines |
| ROPs | 16 ROPs
- 16 colour, 16 blend |
| Core Clock | 450 MHz |
| Fillrate | 10.8 Gigapixels
/ sec. |
| Memory Interface | 4-way 64-bits
memory interface (256-bits total) |
| Memory Buffer | 256 MB
GDDR3 |
| Memory Clock | 660 MHz 1.32 GHz DDR |
| Memory Bandwidth | 42.2 GB/s |
| Vertex Units | 8 Vertex
Units |
| Vertex Clock | 470 MHz |
| Vertex Output | 940 million
vertices / sec. |
| Power Consumption | 82 W |
| Graphics Bus | PCI Express
|
| Shader Model Version | SM 3.0
|
| NVIDIA IntelliSample Technology | 4.0 |
| NVIDIA SLI Technology | Yes |
| NVIDIA Quad SLI Technology | No |
| NVIDIA TurboCache Technology | No |
| 64-bit Texture Filtering and Blending | Yes |
| DVI Support | Two dual-linked
DVI, both integrated into the GPU |
The GeForce 7900 GT will support SLI, but not Quad SLI. It will also feature a smaller thermal solution. Let's take a look.
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|
Back of the card |
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The cooler is evidently much smaller than that used in the GeForce 7900 GTX. You can see all eight GDDR3 memory chips arranged around the GPU on the front PCB. Just like the GeForce 7900 GTX, there's nothing on the back.
If you take a look at the picture on the right, you can see that the cooler is a single slot solution. The cooler does not exhaust air out the bracket. Instead, the bracket features just the single HDTV-out connector and two DVI ports.
GeForce 7900 Series Feature Comparison
Here's a comparison of key features between the GeForce 7900 GTX and the GeForce 7900 GT cards.
GeForce 7900 GTX |
GeForce 7900 GT |
|
| Architecture | G71 |
G71 |
| Process Technology | 90 nm |
90 nm |
| Number of Transistors | 278 Million |
278 Million |
| Die Size | 196 mm2 |
196 mm2 |
| Pixel Pipelines | 24 Pixel
Pipelines |
24 Pixel
Pipelines |
| ROPs | 16 ROPs - 16 colour, 16 blend |
16 ROPs - 16 colour, 16 blend |
| Core Clock | 650
MHz |
450
MHz |
| Fillrate | 15.6
Gigapixels / sec. |
10.8
Gigapixels / sec. |
| Memory Interface | 4-way 64-bits
memory interface (256-bits total) |
4-way 64-bits
memory interface (256-bits total) |
| Memory Buffer | 512
MB GDDR3 |
256
MB GDDR3 |
| Memory Clock | 800
MHz 1.6 GHz DDR |
660
MHz 1.32 GHz DDR |
| Memory Bandwidth | 51.2
GB/s |
42.2
GB/s |
| Vertex Units | 8 Vertex
Units |
8 Vertex
Units |
| Vertex Clock | 700
MHz |
470
MHz |
| Vertex Output | 1400
million vertices / sec. |
940
million vertices / sec. |
| Power Consumption | 120
W |
82
W |
| Shader Model Version | SM 3.0
|
SM 3.0
|
| NVIDIA IntelliSample Technology | 4.0 |
4.0 |
| NVIDIA SLI Technology | Yes |
Yes |
| NVIDIA Quad SLI Technology | Yes |
No |
| DVI Support | Two dual-linked
DVI, both integrated into the GPU |
Two dual-linked
DVI, both integrated into the GPU |
Both the GeForce 7900 GTX and the GeForce 7900 GT are actually VERY similar. They have the same number of vertex units and pixel shader units. The only differences between the two models are the core and memory clock speeds, frame buffer size and thermal solution.
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