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With the introduction of the GeForce4 chip last spring, NVIDIA kept
their reputation intact by providing a powerful chip capable of performance
unseen in previous generations of 3D gaming cards. That was last spring
though. Since that time, ATI has slipped in a few products that have won
the hearts and wallets of many computer enthusiasts. The offerings from
ATI have attracted many buyers because of features and performance unavailable
from the GeForce4 product line.
A much talked about feature making its way on to some of these new video
cards is AGP 8X. This feature is part of the new AGP 3.0 standard that
was included on most new motherboards last fall. The GeForce4 chip was
introduced prior to the new specification in the old AGP 4X incarnation.
Thus the GeForce4 cards have not been able to utilize the benefits of
this new standard, until now.
NVIDIA could not afford to loose any business because the GeForce4 has
an AGP 4X bus and a competitor has an AGP 8X bus. So NVIDIA has refreshed
the GeForce4 product line to support AGP 8X. Just keep reading to see
what AGP 8X brings to the table in the GeForce4 products.
The jump from AGP 4X to AGP 8X should, in theory, double the throughput
of the GeForce4 cards. Due to this expected increase in performance, there
are also promises of significant improvements for complex visualizations,
allowing for graphics environments that are more realistic. In addition,
the isochronous mode operation feature of the AGP 3.0 implementation specifically
improves graphics operations that require predictable, uninterrupted data
flow, such as real-time flows of digital information for video broadcasts
and network downloads.
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AGP 3.0
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AGP 2.0
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AGP Support:
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8x, 4x
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4x, 2x, 1x
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Bandwidth:
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2.1 GB/Sec.
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1.1 GB/Sec.
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Bus Speeds:
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533MHz
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266MHz
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A look at the raw numbers for AGP 3.0 will lead you to believe there
is a dramatic increase in performance for the new AGP 8X cards over the
AGP 4X versions from NVIDIA. The problem with such an assumption is there
are many more factors determining the performance of a video card. There
have been no changes to the architecture of the GeForce4 products other
than the widening of the AGP bus. Taking this into consideration, the
expectations of a colossal performance leap should be brought into check.
In order to compare the real world benefits of the new GeForce4 cards
from NVIDIA, we have run a series of tests comparing the old Ti4400 to
the new Ti4800SE. The specifications for both of these cards are the same,
as the chart below reveals, so we should certainly see just how the AGP
8X bus benefits the GeForce4 Ti cards.
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GeForce4
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Ti 4800 SE
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Ti 4400
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Vertices per Second:
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125 Million
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125 Million
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Fill Rate:
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4.4 Billion AA
Samples/Sec.
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4.4 Billion AA
Samples/Sec.
|
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Operations per Second:
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1.12 Trillion
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1.12 Trillion
|
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Memory Bandwidth:
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8.8 GB/Sec.
|
8.8 GB/Sec.
|
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Maximum Memory:
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128MB
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128MB
|
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Core Clock:
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275MHz
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275MHz
|
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Memory Clock:
|
550MHz
|
550MHz
|
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AGP Support:
|
8x, 4x, 2x
|
4x, 2x
|
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the justification for the name change is. It could be said it is misleading
to name the Ti4400 a Ti4800SE without increasing the speed of the card
above the current Ti4400 cards or the Ti4600 for that matter. Certainly
many will buy the cards thinking 4800 is faster than 4600, even though
the Ti4600 is clocked higher than the Ti4800SE. This certainly illustrates
the need to compare purchases thoroughly before buying based on the name
of a video card. Remember, some consider the job of a Marketing Department
to get you to buy a lesser product for more money.
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