ATI’s Crossfire: Best Overclocker on the Market?
by Wesley Fink on September 27, 2005 12:05 AM EST- Posted in
- CPUs
Basic Features: ATI Crossfire AMD Reference Board
It is almost heresy to call the options and adjustments on the Crossfire AMD "Basic Features", since they are clearly the best that we have ever seen on any AMD motherboard. The DFI nForce4 Ultra and SLI boards have quickly developed a reputation for offering the enthusiast every imaginable BIOS option. We mention the DFI only to put in perspective that the ATI offers 2 more memory adjustments not found on the DFI, a wider range of vDIMM to 4.0V, and even more controls to tweak the performance of the motherboard. It is clear that ATI has worked with a lot of enthusiasts in refining the Crossfire AMD - it shows in the depth and breadth of available options.
At the other end of the spectrum, ATI also offers automatic overclocking options in the BIOS for those uncomfortable with manual overclocking. You can dial in 1% to 15% overclocking and the board handles all the adjustments for you.
You may have noticed that the Gigabyte that we previewed several months ago controlled Crossfire with a "paddle board" similar to what we are accustomed to on NVIDIA. The AMD Reference Board does not use a paddle-card and all switching is done in the BIOS. In fact, the AMD Reference Board is capable of full auto-switching of single or dual video cards with no adjustments required in the BIOS if left in "Auto" mode. A number of video switching options are available to motherboard manufacturers.
| ATI Crossfire AMD Reference Board | |
| CPU Interface | Socket 939 Athlon 64 |
| Chipset | ATI RD480 Northbridge - ATI SB450 Southbridge |
| Bus Speeds | 200 to 500MHz in 1MHz Increments |
| Memory Speeds | DDR200,266,333,366,400,433,466,500 |
| PCIe Speeds | 100 to 200MHz in 1MHz increments |
| PCI/AGP | Fixed at 33/66 |
| Core Voltage | Auto, 0.825V to 1.55V in 0.025V increments PLUS .0V to 0.6V in 0.02V increments (Maximum vCore 2.15V) |
| CPU Clock Multiplier | 4x-25.5x in 0.5X increments |
| DRAM Voltage | Auto, 2.5V to 3.0V in .02V increments 3.0V to 4.0V in .05V increments (Maximun Memory Voltage 4.0V) |
| HyperTransport Frequency | 1000MHz (1GHz) |
| HyperTransport Multiplier | Auto, 1X to 5X |
| HyperTransport Voltage | 1.22V, 1.29V, 1.39V, 1.5V |
| Xpress 200 Voltage | 1.22V, 1.29V, 1.39V, 1.5V |
| PCIe 1.2 Voltage | 1.22V, 1.29 V, 1.39 V, 1.5V |
| PCIe 1.8 Voltage | 1.8V, 1.9V |
| Auto Overclocking | 1% to 15% |
| Memory Slots | Four 184-pin DDR DIMM Slots Dual-Channel Configuration Regular Unbuffered Memory to 4GB Total |
| Expansion Slots | 2 PCIe x16 2 PCI Slots |
| Onboard SATA/RAID | 4 SATA Drives by SB450 (RAID 0, 1, JBOD) 2 SATA II Drives by Sil 3231 |
| Onboard IDE/IDE RAID | Two Standard ATA133/100/66 (4 drives) |
| Onboard USB 2.0/IEEE-1394 | 8 USB 2.0 ports supported by SB450 2 1394 Firewire by VIA |
| Onboard LAN | Gigabit PCIe Ethernet by Marvel 88E8052 |
| Onboard Audio | Azalia HD Audio by Realtek ALC880 |
| BIOS | AMI Build 50 and Award Build 54 |
It is almost heresy to call the options and adjustments on the Crossfire AMD "Basic Features", since they are clearly the best that we have ever seen on any AMD motherboard. The DFI nForce4 Ultra and SLI boards have quickly developed a reputation for offering the enthusiast every imaginable BIOS option. We mention the DFI only to put in perspective that the ATI offers 2 more memory adjustments not found on the DFI, a wider range of vDIMM to 4.0V, and even more controls to tweak the performance of the motherboard. It is clear that ATI has worked with a lot of enthusiasts in refining the Crossfire AMD - it shows in the depth and breadth of available options.
At the other end of the spectrum, ATI also offers automatic overclocking options in the BIOS for those uncomfortable with manual overclocking. You can dial in 1% to 15% overclocking and the board handles all the adjustments for you.
Click to enlarge.
Click to enlarge.
You may have noticed that the Gigabyte that we previewed several months ago controlled Crossfire with a "paddle board" similar to what we are accustomed to on NVIDIA. The AMD Reference Board does not use a paddle-card and all switching is done in the BIOS. In fact, the AMD Reference Board is capable of full auto-switching of single or dual video cards with no adjustments required in the BIOS if left in "Auto" mode. A number of video switching options are available to motherboard manufacturers.
Facebook
Twitter
RSS
40 Comments
View All Comments
Starcraftfreak - Friday, September 30, 2005 - link
So you are saying, the Board supports the dividers for DDR500 also on a Revision C core? I can remember when you published an article explaining it's a new feature of Revision E. Please clarify.SLI - Wednesday, September 28, 2005 - link
Everything I have seen thus far on the ATI chipset points to the FSB dropping to DDR333 *IF* you populate all 4 DIMM slots (with DDR400 RAM) This was an issue at the CPU level with AMD Athalon on board memory controller (at first) but has been addressed with the newer steppings. VIA and Nvidia chipsets have support for DDR400 with all 4 slots populated. This is a very important aspect to me and it needs to be addressed.Wesley Fink - Wednesday, September 28, 2005 - link
It was addressed in tRAS and Memory Stress Tests in the review - p.5. We had no trouble with 4 dimms at DDR400, though we did have to drop to 2T with 4 dimms as we do on every other AMD chipset. This is more a function of the on-CPU memory controller.sxr7171 - Wednesday, September 28, 2005 - link
I don't get it. We switched to SATA to get worse performance? SATA performed worse than IDE in every single benchmark.Scarceas - Tuesday, September 27, 2005 - link
I'd like to know what happens when you try two 6800s in a crossfire motherboard...I'm also curious about what happens why you try crossfire graphics cards on an NF4 SLI motherboard...
Early on I heard rumors that the motherboard implementation would be similar between the two and that mixing motherboard/graphics manufacturers *might* be possible...
Now the hardware is showing up and no one has tried it?
vailr - Tuesday, September 27, 2005 - link
Check: page 11 "Ethernet Performance" has format errors:http://www.anandtech.com/cpuchipsets/showdoc.aspx?...">http://www.anandtech.com/cpuchipsets/showdoc.aspx?...
Copied & pasted:
It will almost always be <em>much</em> lower than what we have measured.<br /> <br /> </span> </div> <div class="adcontainer"></div> <table border="0" width="100%"> <tr> <td align="right" colspan="2"> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td><strong><a href="showdoc.aspx?i=2542&p=12" class="smalllink">Audio
tanekaha - Wednesday, September 28, 2005 - link
Ethernet page has same problem as b4 hereI`m using firefox latest beta and the browser considers the page done after this line.
Ntttcpr - m 4,0,
I guess u use a template for these reviews I had exactly the same prob with ( and commented similarly ) with I think the asrock dual article.
I guess not many others are getting this prob but I`m glad 2 see some! else has a prob and not just me.
What browser are u using ?
Wesley have u tried 2 view the article with firefox beta ? or even firefox ?
Wesley Fink - Thursday, September 29, 2005 - link
Articles are created in a document engine by our Web Editor, from basic information layouts we send the Web Editor. The engine generates HTML code. We don't individually generate the code for articles. Any problems with viewing the pages should be emailed to our webmaster Jason.Clark@anandtech.comtanekaha - Thursday, September 29, 2005 - link
Thanks for the replies gentsI am not using any blockers or extentions .. apart from FF default pop up blocker.
I will mail jason with the facts (as I see them)
I`ll also send the info to the FF team
THX again
tanekaha
JarredWalton - Wednesday, September 28, 2005 - link
If you're using any extensions to block ads or other content, you might want to try disabling those. I've been using Firefox for over a year now, and I don't have any issues with the pages. (Some pages render improperly the first time and I need to hit refresh, but that's generally only on long pages, and it seems more of a FF bug than anything.)