DFI LANParty UT RDX200: ATI’s Crossfire AMD for the Bleeding Edge
by Wesley Fink on October 18, 2005 11:03 AM EST- Posted in
- Motherboards
4 DS DIMMs at 1T: Memory Stress Testing
The DFI easily handles 2-2-2-7-1T timings at stock speed with 2 double-sided dimms, as do almost any of the current boards for AMD Socket 939 from NVIDIA, SiS, VIA, and ULi. However, what is truly unique is that the DFI LANParty UT RDX200 is the first board designed to run four double-sided 512MB or 1GB DIMMs at the fastest timings and a 1T Command Rate. In fact, AMD specifications tell us that this is impossible. To his credit, Oskar Wu and DFI found a way to accomplish the impossible.
*7T was determined by MemTest86 benchmarks to deliver the widest bandwidth with the ATI Rx480/482 chipset. While the board would operate at tRAS of 5T or lower, all benchmarks were run at 7T.
With the ability to run 4 DS DIMMs at 1T, we had the opportunity to finally show the impact of a drop to a 2T Command Rate on performance.
First, for those skeptical that this is possible, we captured screens from the freeware A64 Tweaker and CPU-Z showing operation of 4 DIMMs at 1T.
To clearly demonstrate the impact of the normal 2T drop in Command Rate on performance, we ran Aquamark3 benchmarks with 2 DIMMs at 1T, 4 DIMMs at 2T, and the new option of 4 DIMMs at 1T.
For those who are thinking that surely there's a catch, the answer is "yes, there is". 1T operation is only possible to a frequency of about DDR406, which basically limits it to stock speeds. Above that speed, you must run 4 DS DIMMs at 2T as you normally must. However, at or near stock speeds, the 1T option is a brilliant development that delivers better performance.
The DFI easily handles 2-2-2-7-1T timings at stock speed with 2 double-sided dimms, as do almost any of the current boards for AMD Socket 939 from NVIDIA, SiS, VIA, and ULi. However, what is truly unique is that the DFI LANParty UT RDX200 is the first board designed to run four double-sided 512MB or 1GB DIMMs at the fastest timings and a 1T Command Rate. In fact, AMD specifications tell us that this is impossible. To his credit, Oskar Wu and DFI found a way to accomplish the impossible.
| Stable DDR400 Timings - 4 DIMMs (4/4 DIMMs populated) |
|
| Clock Speed: | 200MHz |
| CAS Latency: | 2.0 |
| RAS to CAS Delay: | 2T |
| RAS Precharge: | 7T* |
| Precharge Delay: | 2T |
| Command Rate: | 1T |
With the ability to run 4 DS DIMMs at 1T, we had the opportunity to finally show the impact of a drop to a 2T Command Rate on performance.
First, for those skeptical that this is possible, we captured screens from the freeware A64 Tweaker and CPU-Z showing operation of 4 DIMMs at 1T.
Click to enlarge.
To clearly demonstrate the impact of the normal 2T drop in Command Rate on performance, we ran Aquamark3 benchmarks with 2 DIMMs at 1T, 4 DIMMs at 2T, and the new option of 4 DIMMs at 1T.
For those who are thinking that surely there's a catch, the answer is "yes, there is". 1T operation is only possible to a frequency of about DDR406, which basically limits it to stock speeds. Above that speed, you must run 4 DS DIMMs at 2T as you normally must. However, at or near stock speeds, the 1T option is a brilliant development that delivers better performance.
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nsk - Tuesday, October 18, 2005 - link
Having 8 SATA ports is very useful. kudos to DFI for putting that extra SiI chip.Diasper - Tuesday, October 18, 2005 - link
What's good about this board IMO is the Azalia Audio and CPU utilisation - *very* impressive for on-board audio. Performance and options are of course very good as well although nothing worth paying significantly more for.However, just to point out one additional benefit of the board that you guys might not have realised yet is that it could very much make a quiet computer guy very happy as the active chipset cooler can very easily be replaced with a passive heatsink eg Zalman one. Trying that with many NF4 is impossible unless resorting to modding - with some coming up with some quite radical solutions. After all there's no point buying a nice and expensive case like the Antec P180 and then a quiet PSU ontop only to have a screaming NB fan in your NF4 - unless resorting to modding.
However, as others have mentioned deal-breakers include poor USB performance and no SATA 2 and possibly cost althought we'll have to wait on that one.
Azkarr - Tuesday, October 18, 2005 - link
Well, it's on newegg now. $239? I think thats just about $50 too much for not having SATA II. Plus, none of the Crossfire cards except the XL are out, so I don't think there's a point to buying this board.http://www.newegg.com/Product/Product.asp?Item=N82...">Newegg
Slaimus - Tuesday, October 18, 2005 - link
Which sound driver was used to get such a low CPU usage score? Realtek or ATI?Wesley Fink - Tuesday, October 18, 2005 - link
We used the Realtek sound driver on the DFI CD with the board for testing. We did use the current 5.10 Catalyst drivers, however, instead of the Crossfire 5.8 drivers on the CD.nourdmrolNMT1 - Tuesday, October 18, 2005 - link
http://images.anandtech.com/reviews/motherboards/d...">http://images.anandtech.com/reviews/motherboards/d...WTF is up with the one SATA connector? sata7 specifically it looks completely off.
emilyek - Tuesday, October 18, 2005 - link
A clawhammer for overclocking?Also,
A real test of the 1T/2T stuff would be gaming benchmarks for 2 x 1G @ 1T and 4 x 512 @ 2T. That's the test I want to see.
ozzimark - Tuesday, October 18, 2005 - link
this stands out at me.http://images.anandtech.com/graphs/dfi%20rdx200_10...">http://images.anandtech.com/graphs/dfi%20rdx200_10...
that data is... somewhat useless for the top 5-9 boards, as it's obviously a cpu limitation. try oc'ing the htt/fsb with the fx-57 and watch the board break 400mhz
Pete84 - Tuesday, October 18, 2005 - link
Horrible!! The only things going for this board is that I. It has Crossfire and II. It has some nice memory capabilities and III. It has Azaliz.Pathetic USB performance, no SATA II!!! When even budget minded boards have SATA II and this one does not, now that is a serious lapse. Having a seperate raid controller with some SATA II ports would help this, especially so if it was on the PCI-E bus, but wow . . . and price at $230!!!
haelduksf - Tuesday, October 18, 2005 - link
I don't understand why SATA-II is such a big deal to so many people. NCQ has a negligable impact unless you're running a server (on a XFire motherboard...), and the 300MB/s transfer speed has no effect at any time with currently available harddrives.