ULi M1575 for ATI Crossfire – SATA2 and Fast USB for the ATI Chipset
by Wesley Fink on October 13, 2005 4:21 PM EST- Posted in
- CPUs
The ULi M1575 South Bridge
The earlier ULi M1573 South Bridge had a feature set roughly comparable to the ATI SB450 South Bridge described in the Crossfire AMD launch article. The only real difference is that M1573 does support NCQ on hard drives while the ATI RS450 does not. M1575 updates M1573 for a much more competitive feature set.
The M1575 feature set is very competitive except for the fact that it only supports 10/100 Ethernet. However, PCIe Gigabit Ethernet can be added to PCIe lanes on the South Bridge or North Bridge to provide a dual Gigabit PCIe/10-100 PCI LAN solution.
The earlier ULi M1573 South Bridge had a feature set roughly comparable to the ATI SB450 South Bridge described in the Crossfire AMD launch article. The only real difference is that M1573 does support NCQ on hard drives while the ATI RS450 does not. M1575 updates M1573 for a much more competitive feature set.
- 4-Drive Serial ATA II 3Gb/s (AHCI) with NCQ Support
- RAID 1, 0, 0+1, 5, JBOD
- PCI Express Interface to North Bridge (Like SB450 and M1575)
- High Definition Audio and AC'97 Audio
- Full ACPI and Legacy Interrupt/DMA support
The M1575 feature set is very competitive except for the fact that it only supports 10/100 Ethernet. However, PCIe Gigabit Ethernet can be added to PCIe lanes on the South Bridge or North Bridge to provide a dual Gigabit PCIe/10-100 PCI LAN solution.
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nlr_2000 - Saturday, October 15, 2005 - link
nlr_2000 - Saturday, October 15, 2005 - link
It's on page 5.DRavisher - Friday, October 14, 2005 - link
Just you wait. In a couple of years ATi will finaly figure out how USB works and release a self made southbridge under the slogan "USB done right!", where they will tout their superiority in USB over nvidia, and how important good USB performance from the same company that designed the northbridge is for a company.sprockkets - Friday, October 14, 2005 - link
why bother with another southbridge? Keep it simple for linux driver support.But since video with nvidia is better supported anyhow, might as well just use the 6100 vs the exp 200
LoneWolf15 - Friday, October 14, 2005 - link
Good review. I guess for me it all comes down to the same thing though, economics.SLI and Crossfire have a high cost. Two video cards, a motherboard that supports them, a power supply that supports them, plus additional cooling. And then within 6-10 months, a new high-end card comes out that's a single-slot solution that can beat previous SLI/Crossfire solutions before it, and since it's single slot, doesn't need the special mainboard.
I think we'll see in a year, maybe two tops, that vendors will begin implementing either dual-core GPU chips, or two GPU chips on a single PCIe card much more often, making SLI and Crossfire a moot point for all but people who need a high-performance multi-monitor setup. I think SLI and Crossfire are just stopgap solutions until this arrives, and a lot of money to spend when a mid-to-high-end single card will give you what you need for less.
notposting - Thursday, October 13, 2005 - link
Don't suppose there's been any word on more motherboard's based on ULi's 1695 North bridge?The Asrock looks like a pretty good board, but I when I toss my chips into the 64bit pile I'll be trying to get a top line mobo featurewise, Firewire, SATA2, gigabit Lan, great sound.
Good to see some competition for Nvidia (and Intel ironically by Nvidia) in the chipset department. Better for us and pushes them (all the manufacturers) harder.
tuteja1986 - Thursday, October 13, 2005 - link
My main reason for wanting to buy a ATI chipset at the moment is because of Sata 2 performance and overclocking abilities. I couldn’t care less for USB since I only use a USB mouse, and Joystick that computer. If i really need a fast USB port than i would just buy a cheap $10 PCI USB/Firewire card from my local computer store.Madellga - Thursday, October 13, 2005 - link
We got an important piece of information provided by Wesley: The Crossfire motherboards are not a paperlaunch due to ATI delays, they were delayed by the OEMs due a last minute change to the ULI1575 chipset.It is worth in my opinion the delay, as we can get a truly competitive solution, even if one doesn't need the Crossfire feature.
I still have a question for Wesley: some say that the ATI/ULI combo chipsets run cooler than Nvidia's. Is that true?
Wesley Fink - Thursday, October 13, 2005 - link
I've had the bare ULi SB running for hours. It's very warm to the touch but not hot - without any heatsink at all. A passive heatsink should be plenty. The ATI RS480 north bridge has a passive heatsink which is completely cool to the touch. The final Crossfir RD482 uses the .11 process compared to the .13 on theis RS480.The ATI solution is 2 chips compared to the single-chip nVidia, which may partially account for the extra heat many complain about on the nVidia nF4.
The ATI chipset delays are a result of several factors - the ULI M1575 being just one. I have been told the chipset has been ready for months, but the video component was a moving target. Final release needed a coordinated Crossfire video and chipset solution, and Crossfire has only recently been solidified to the point of production. The video delays made the chipset late since no manufacturer wanted to launch a new chipset only to face potentail board revisions in a month or two.
Cygni - Thursday, October 13, 2005 - link
Not entirly true... the boards NOT using ULi southbridges (using the ATI SB540) arent exactly flooding the market, ya know.No, the last minute change simply kept a few major players like ASUS from (not really) launching with the rest of the boards that are using the ATI southbridge.