ATI Bullhead Reference Board: Basic Features

ATI calls their new ATI RX480 Reference Board the "Bullhead", and it even carries a logo of a Bullhead fish on the motherboard.



The Bullhead is an extremely wide-ranging variety of fish related to channel catfish. There is probably a lot more to the story.

 ATI RS480 Reference Board Specifications
CPU Interface Socket 939 Athlon 64
Chipset RS480/SB400
Bus Speeds 200MHz to 320MHz
PCI Express Speeds PCIe FIX at 100MHz to 200MHz (in 1MHz increments)
Core Voltage 1.0V to 1.7V in 0.025V increments
CPU Clock Multiplier 4X-25.5X in 0.5X increments
CPU Auto Tuning Off to 15% in 1% increments
HyperTransport Frequency 1000MHz (1GHz)
HyperTransport Multiplier 1X, 2X, 4X, 5X
DRAM Voltage 2.6V, 2.85V
AGP Voltage None available on Reference Board
HyperTransport Voltage None available on Reference Board
Memory Slots Four 184-pin DDR DIMM Slots
Dual-Channel Configuration
Regular Unbuffered Memory to 4GB Total
Expansion Slots 1 x16 PCIe Slot
3 x1 PCIe Slots
2 PCI Slots
1 Dedicated Communications Riser
Onboard SATA/SATA RAID 4 Drives by SB400
(RAID 0, 1)
Onboard IDE/IDE RAID Two Standard ATA133/100/66 (4 drives)
Onboard USB 2.0/IEEE-1394 8 USB 2.0 ports supported by SB400
2 Firewire 1394A by VIA VT6306
Onboard LAN 1Gigabit Ethernet by Realtek 8110S-32
Onboard Audio AC '97 2.3 8-Channel by Realtek ALC655
BIOS Revision AMI AMBU-B10 11/02/2004

The ATI Bullhead Reference Board is truly unique among the Reference boards that we have tested. Normally, the Reference Board is devoid of BIOS adjustments and overclocking controls that may later appear on boards designed with the Reference chipset. The ATI Bullhead, on the other hand, is loaded with a huge range of controls that will make any enthusiast happy. It is very clear that ATI's goal was to demonstrate, on the front end, that their new chipset for AMD Athlon 64 can hold its own against any competition in the market. Given the enthusiast orientation of some other chipsets for Athlon 64, this was a very smart move by ATI. While ATI is well-known in the OEM market, this attention to flexible ranges and useful overclocking controls announces to the market that ATI intends to be a serious player in the Athlon 64 enthusiast arena.

As a result of the attention that ATI has lavished on the Bullhead, we have the capabilities of testing the overclocking capabilities and memory stress testing that are normally not possible with a Reference design.



The ATI Bullhead is generally very well laid out - much better than we normally see in Reference boards. The power connectors are in the best position on board edges to ease power cable routing. The Hard Disks and SATA locations are reasonable. Even the floppy connector is in a better mid-board location instead of the bottom location that creates a challenge on many new boards. Manufacturers would do well to copy the ATI Bullhead Reference design. No board is perfect in layout, but the Bullhead is very easy to work with in most cases.



ATI also included a full range of IO ports on the Bullhead Reference board. Additional audio connectors are available on a port header in the dedicated CNR slot. The range of options and ports is unusually complete for a Reference board. Once again, the Reference design is worth copying by manufacturers. Perhaps ATI realized that without the chipset history of nVidia or VIA, they would have to work harder to get the market to take ATI seriously as a chipset option. One clever way to accomplish that is to deliver a Reference board that can be put into production by manufacturers without much, if any, redesign. It works for graphics cards, and it can certainly also work for motherboards.

The Radeon Xpress Family BIOS Features: ATI Bullhead
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  • ImJacksAmygdala - Monday, November 8, 2004 - link

    Good job Wesley and Anandtech staff, very nice article! Thanks for answering all the questions Wesley...

    Things are really heating up for AMD64 chipsets... I might just have to wait for Q1 2005, but then dual core CPUs will be the rage of rumor and HL2 is right around the corner ARGH!!!!!!

    I might just bite the bullet and pull the trigger on an AMD64 3500+ with a Nforce4 or ATI chipset this holiday season because I really can't run HL2.... I cannot continue to wait for the next best thing. I have been waiting to upgrade since dual DDR was just a rumor... LOL!

  • xsilver - Monday, November 8, 2004 - link

    Are these going to be shipping mainly for s754 or s939? I think determining factor will be price, cheaper than nforce 4 ultra? isnt that going to be $150+? I think they need to get closer to $100 for any serious challenges..
  • Penty - Monday, November 8, 2004 - link

    I don't know, I still want Tyan's new dual Opteron with dual SLI board.

    http://my.so-net.net.tw/brandon640410/NF41/004.JPG
  • Zebo - Monday, November 8, 2004 - link

    Nice article. But I'm afraid, like the out-standing SiS ref board, these may never see light of day but in budget off brand products like ECS, FOXCONN, MATSONIC etc nVidia just seems to dominate the enthusiast sector.:(
  • Wesley Fink - Monday, November 8, 2004 - link

    #29 - A new Sounthbridge, called SB450, is due to debut the first of the year. It will feature High-Definition audio and other updates.

    RAID - Here is the reply from ATI regarding RAID on the Rx480/SB400:
    "Your Raid answers are as follows:

    Our Raid implementation will support up to 8 SATA devices. This is limited by ODM implementing appropriate amount of SATA channels on pcb.

    1) Currently SB400 supports RAID on SATA, not on IDE (PATA).

    2) IDE cannot be combined with SATA in RAID. Limited to SATA only.

    3) We only support RAID 0 and RAID 1.

    4) We do support hot swap for RAID 1. We can replace the failed hard disk and rebuild a new driver in RAID 1"

    The review will be updated.

  • keitaro - Monday, November 8, 2004 - link

    Here's a hardware question for you folks. Given that SLI is becoming more and more of an option, I'd like to know if the scenerio I thought up can be possible. Also, a general question is "What can a HyperTransport link be used? Is it specifically a link from CPU to north/south-bridge or is it a general link for general access?"

    The above question will basically determine if the scenerio I thought of is possible. Basically have a HT link big enough for an additional chip where it supports additional PCI Express lanes for 1x, 2x, or 4x slots. I see current chipsets designed with 20 lanes, or in ATi's case 22 lanes, and it got me to wondering if such a scenerio is truly possible that a full dual 16x instead of dual 8x can be a reality. If you can explain or answer this, that'll be great.
  • mctmcpoop - Monday, November 8, 2004 - link

    The main problem of the ATI chipset will be the compatibility of south bridge ... Their south bridge sucks and that's why some of the RS350 motherboard use ULI south bridge instead of their solution ...

    http://techreport.com/reviews/2004q4/radeon-xpress...

    You can check with the USB performance ... That can be called the most worst that I have ever seen ... And we still do not know if there is any compatibility issue of the USB interface unless there is a lot of ATI chipset based retail board hit the market …

    And a preview board of chipset vendor is nothing important ... Where is the highly phrased SiS 755/755FX chipset based and good quality motherboard we can buy ? Sometimes there is something inside the chipset that we can reveal from the demo board if all the motherboard maker does not have the solution …

    Anyway , time will tell …
  • FinalFantasy - Monday, November 8, 2004 - link

    #27 I doubt ATI is doing that. If the mobo's that ship are noticealbe different (performance wise) from the one's ATI are sending out for review, I know that there will be a huge backlash from the hobbyist community and ATI knows this.
  • blckgrffn - Monday, November 8, 2004 - link

    Is no one else suspicious that ATI shipped out hand picked, thouroughly tested MOBO's that may not be representative of shipping boards? I will wait until I see a review of boards using this chipset in the future before I make up my mind.
  • FinalFantasy - Monday, November 8, 2004 - link

    Wow...ATI really stepped it up with their new chipset and integrated graphics solutions. This chipset should really give nVidia's NF4 a run for it's money. Also I agree w/#22...let's see some HDD performance benchies and what about an integrated software firewall or on-board RAID controller (article says similar to NF4's "Any-Drive")...how do these components compare to NF4's or does ATi's chipset even have them.

    I know I was skeptical about ATI coming out with an A64 chipset, but they've really gone above and beyond what I've expected with their "first" board. I am VERY impressed with their OC'ing performance.

    I don't want to say that this new chipset is the best thing since sliced bread (I'm sure nVidia has a response to ATI's chipset in the works), but when it comes time to buy my 90nm A64 rev E0, ATI looks like they might have my business/money/whatever the hell you want to call it ;D.

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