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Introduction
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We first covered the launch of the new NVIDIA GeForce 9800 GTX+ on June 20, 2008. Launched right after the GT 200 series of graphics cards, the GeForce 9800 GTX+ is die-shrinked version of the venerable NVIDIA G92 GPU, used in cards like the GeForce 8800 GTS 512MB and the GeForce 8800 GT.
Thanks to the die-shrink from 65 nm to 55 nm, NVIDIA was able to further boost the core and shader clock speeds of the GPU by 9.3%. Everything else was unchanged, including the memory clock which remained at 1.1 GHz. Hence, NVIDIA called it the GeForce 9800 GTX+ (Plus), instead of the GeForce 9900 GTX.
For more details on the actual architecture of the G92 GPU, do take a look at our NVIDIA GeForce 8800 GT Tech Report.
Let's take a look at how the GeForce 9800 GTX+ compares against its predecessors.
|
GeForce |
GeForce |
GeForce |
GeForce |
GeForce |
Architecture |
G92 |
G92 |
G80 |
G71 |
G70 |
Manufacturing |
55 nm |
65 nm |
90 nm |
90 nm |
110 nm |
Transistor |
754 Million |
754 Million |
681 Million |
278 Million |
302 Million |
DirectX |
10 |
10 |
10 |
9.0c |
9.0c |
Interface |
PCIe 2.0 |
PCIe 2.0 |
PCIe |
PCIe |
PCIe |
Vertex |
- |
- |
- |
8 |
8 |
Stream Processors |
128 |
128 |
128 |
- |
- |
Vertex
Shader |
4.0 |
4.0 |
4.0 |
3.0 |
3.0 |
ROPs |
16 |
16 |
24 |
24 |
24 |
Pixel Shader |
4.0 |
4.0 |
4.0 |
3.0 |
3.0 |
Core Speed |
738 MHz |
675 MHz |
575 MHz |
650 MHz |
430 MHz |
Fill Rate |
47,232 MTexels/s |
43,200 MTexels/s |
36,800 MTexels/s |
15,600 MTexels/s |
10,320 MTexels/s |
Memory
Bus |
256-bits |
256-bits |
384-bits |
256-bits |
256-bits |
Memory |
GDDR3 |
GDDR3 |
GDDR3 |
GDDR3 |
GDDR3 |
Memory Speed |
1100 MHz |
1100 MHz |
900 MHz |
800 MHz |
600 MHz |
Memory |
70.40 GB/s |
70.40 GB/s |
86.40 GB/s |
51.20 GB/s |
38.40 GB/s |
It is obvious that the GeForce 9800 GTX+ is just a minor update of the GeForce 9800 GTX. With only a 9.3% boost in core speed and a corresponding increase in fill rate, the GeForce 9800 GTX+ can only offer a small performance boost over its predecessor. On the other hand, the new 55 nm fabrication process should allow the GeForce 9800 GTX+ to run cooler and use less power, potentially improving its overclockability.
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