NVIDIA GeForce 6800GT Roundup
NVIDIA GeForce 6800GT PCI-E
Design and layout
Finally, a little bit of exotics, that is, PCI-E. Unlike the formerly examined video cards based on GeForce 6800GT (NV40), this card is already a NV45 chip whose major distinction from the predecessor NV40 is in the change of interface.
That is, this board is a PCI-E "reincarnation" of GeForce 6800GT equipped with a HSI bridge. In fact, there are a couple more distinctions which we will definitely examine in more detail later. Now on to the board. This is a NVIDIA's reference video card presented to us for tests by the Russia's office.
Afterwards, manufacturers will invent a huge number of interesting and smart solutions in terms of the cooling system, but in this case the board's cooling system is an exact replica of what we saw on the GeForce 6800GT reference board with the AGP-interface. The aluminum radiators covering the GPU, a separate radiator for all the memory chips positioned over the front side of the board, and a lid covering the whole structure with an image of Nalu mermaid - a symbol of GeForce 6 Series, and a company logo. The cooling system is single-slotted.
The board offers 256Mb of GDDR3 video memory with a 256-bit data transmission bus, with the memory assembled of eight Samsung memory chips carrying the K4J553230F-GC20 memory, made in the BGA form factor, of 2 ns access time, which is equivalent to 500 MHz (1000 MHz DDR) nominal operating frequency at which memory on the board runs. All the eight video memory chips are positioned on the card's front side.
Judging by the marking on the GeForce 6800GT chip was made on the 21st week of year 2004 and has revision A1. Below is the very HSI connection bridge. We will find out in detail if its presence seriously affects the board's performance as compared to its AGP analog.
Here is another distinction from GeForce 6800GT AGP. Draw your attention to the SLI connector the board is equipped with.
The card is also equipped with an additional power supply adapter which also differs from what are used to seeing on AGP video cards.
There are the following outputs: analogous, digital, and TV-OUT.
Having presented to you all the boards taking part in today's round, we can now get down to the major part, the comparative tests.
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