The ATI 9100 IGP
Originally the Radeon
9100 IGP was only certified to run at 400MHz and 533 MHz FSB, but after
extending its cross licensing agreement with Intel, the ATI 9100 IGP acquired
the 800 MHz FSB capability which is necessary to compete with Intel's own i865G
integrated chipset. It also recognizes Hyper-Threading in the Pentium 4
9100 IGP core logic is manufactured on TSMC's mature 0.15-micron process
(like their R300 class videocards), and like Intel's i865/i875P chipsets,
the RADEON 9100 IGP utilizes a 128-bit DDR memory bus split between two 64-bit
memory bus is capable of delivering up to 6.4GB per second of throughput using
DDR400 modules, of which only two can be installed. In order to realize the
platform's 4GB memory ceiling, you'll have to employ more conservative memory
integrated graphics core if the Radeon 9100IGP is similar to ATI's RADEON 9200
discrete card. But because the IGP must conform to certain size and thermal
restrictions, ATI has stripped it down to a degree. The 9100 IGP features two
pixel pipelines instead of four. Further, the hardware-based transform and
lighting engine has been extracted from the core in favor of a software
algorithm that off loads vertex calculations to the host processor.
that there is a minimal performance penalty, and considering the power of modern
Pentium 4 processors, there are more than enough computational resources to
handle the job, at least at 3 GHz.
The IXP 150 Southbridge
ATi currently have three variations of the IXP southbridge;
the IXP250, IXP200 and IXP150. The IXP250 in all fairness is actually a notebook
Southbridge as the only difference between it and the IXP200 are power saving
features. The IXP150 lacks the on board ethernet MAC, but that's not important
considering the Asus P4R800-V has an onboard Gigabit ethernet NIC.
entire IXP-series are missing some features that are standard with the other
Southbridge's on the market; for instance, whereas the IXP 150 supports six USB 2.0 ports, Intel's ICH5 boasts eight.
facilitates six-channel audio through an AC'97 codec, it is in no way as
advanced as NVIDIA's MCP-T (Soundstorm) and its Dolby Digital encoding
capability. Finally, the IXP's most glaring weakness is a lack of any Serial ATA
support, something both Intel and VIA have already added to their respective
support Ultra ATA-100 drives however, and thanks to a SIS chipset, the Asus
P4R800-V Deluxe will support two SATA drives.