NVIDIA GeForce 7800 GTX Review

GeForce6800 Die NVIDIA GeForce 7800 GTX Review
NV40 Die
 

Die GeForce 7 Series s NVIDIA GeForce 7800 GTX Review
G70 Die
 

 
Radeon X850 XT PE

GeForce 6800 Ultra

GeForce 7800GTX
Codename
R480

NV40/45
G70
Micron Process
0.13

0.13

0.11
Transistors>
160M

222M

302M
Core Clock
540Mhz

425Mhz

430Mhz
Memory Clock
1180Mhz

1100Mhz

1200Mhz
Pixel Pipelines161624
Vertex Shader668
Peak Pixel Fill
Rate

8.64Gpixels/s

6.8Gpixels/s

10.32Gpixels/s
Textures Units
Per Pixel Pipeline
111
Peak Textures
Fill Rate

8.64Gtexels/s

6.8Gtexels/s

10.32Gtexels/s
Memory
Interface

256-bit GDDR3

256-bit GDDR3

256-bit GDDR3
Peak Memory
Bandwidth

37.8GB/s

35.2GB/s

38.4GB/s

NVIDIA claims that GeForce 7800GTX is a completely new GPU
architecture and is the most complex GPU ever built. It contains a whopping 302M
transistors manufacture on a more mature 0.11 micron process at TSMC. The die
size of 7800GTX is still slightly larger than the 6800U although it is based on
0.11 micron compared to 0.13 for the 6800U since it packs 80M more transistors.
It has 24 pixel pipelines and 8 vertex shader units compared to 16 and 6
respectively in GeForce 6800Ultra. The core of GeForce 7800GTX is clocked at a
430Mhz, just some 5Mhz more than its the 6800 Ultra and the memory is at 1.2Ghz,
some 100Mhz higher than 6800 Ultra.

 

NV40 NVIDIA GeForce 7800 GTX Review
NV40/45

Architecture 1 NVIDIA GeForce 7800 GTX Review
G70

If you look at the diagram above, the G70 macro architecture
isn’t too different from the NV45 architecture but NVIDIA claims that it is
designed from ground up. However, NVIDIA has made many micro architectural
changes to the pixel, vertex and texture engines; more pixel shaders, more
vertex shader and more efficient shaders. NVIDIA has also improved the
efficiency of the Cull / Clip / Setup on the G70 compared to the NV40 improved
by over 30% in fixed-function portion of the vertex pipeline. Also it is
interesting to know that G70 share close similarities to the RSX graphics
processor of the Sony Playstation 3.

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GeForce6800 Die NVIDIA GeForce 7800 GTX Review
NV40 Die
 

Die GeForce 7 Series s NVIDIA GeForce 7800 GTX Review
G70 Die
 

 
Radeon X850 XT PE

GeForce 6800 Ultra

GeForce 7800GTX
Codename
R480

NV40/45
G70
Micron Process
0.13

0.13

0.11
Transistors>
160M

222M

302M
Core Clock
540Mhz

425Mhz

430Mhz
Memory Clock
1180Mhz

1100Mhz

1200Mhz
Pixel Pipelines161624
Vertex Shader668
Peak Pixel Fill
Rate

8.64Gpixels/s

6.8Gpixels/s

10.32Gpixels/s
Textures Units
Per Pixel Pipeline
111
Peak Textures
Fill Rate

8.64Gtexels/s

6.8Gtexels/s

10.32Gtexels/s
Memory
Interface

256-bit GDDR3

256-bit GDDR3

256-bit GDDR3
Peak Memory
Bandwidth

37.8GB/s

35.2GB/s

38.4GB/s

NVIDIA claims that GeForce 7800GTX is a completely new GPU
architecture and is the most complex GPU ever built. It contains a whopping 302M
transistors manufacture on a more mature 0.11 micron process at TSMC. The die
size of 7800GTX is still slightly larger than the 6800U although it is based on
0.11 micron compared to 0.13 for the 6800U since it packs 80M more transistors.
It has 24 pixel pipelines and 8 vertex shader units compared to 16 and 6
respectively in GeForce 6800Ultra. The core of GeForce 7800GTX is clocked at a
430Mhz, just some 5Mhz more than its the 6800 Ultra and the memory is at 1.2Ghz,
some 100Mhz higher than 6800 Ultra.

 

NV40 NVIDIA GeForce 7800 GTX Review
NV40/45

Architecture 1 NVIDIA GeForce 7800 GTX Review
G70

If you look at the diagram above, the G70 macro architecture
isn’t too different from the NV45 architecture but NVIDIA claims that it is
designed from ground up. However, NVIDIA has made many micro architectural
changes to the pixel, vertex and texture engines; more pixel shaders, more
vertex shader and more efficient shaders. NVIDIA has also improved the
efficiency of the Cull / Clip / Setup on the G70 compared to the NV40 improved
by over 30% in fixed-function portion of the vertex pipeline. Also it is
interesting to know that G70 share close similarities to the RSX graphics
processor of the Sony Playstation 3.

Prev2 of 23Next
Use your ← → (arrow) keys to browse
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