Asus A8R32-MVP Deluxe: First ATI RD580
by Wesley Fink on March 1, 2006 9:00 AM EST- Posted in
- Motherboards
Optimum tRAS
In past reviews, memory bandwidth tests established that a tRAS setting of 11 or 12 was generally best for nForce2, a tRAS of 10 was optimal for the nForce3 chipset, a tRAS of 7 was optimal for the nForce4/ATI RD480/ULi M1697 chipsets, and a tRAS of 10 produced the best bandwidth on the ULi 1695.
Since this is our first review of a board with the new ATI RD580 chipset, tRAS timings were first tested with memtest86, a free diagnostic program with its own boot OS that will boot from either a floppy disk or optical disk. Bandwidth of OCZ PC3200 Platinum Rev. 2, based on Samsung TCCD chips, was measured from tRAS 5 to tRAS 15 to determine the best setting.
The tRAS setting that produced the highest memory bandwidth with the ATI RD580 chipset was 8. The tRas 8 setting was used for all memory testing on the Asus A8R32-MVP Deluxe.
Memory Stress Testing
The Asus A8R32-MVP easily handles 2-2-2-8-1T timings at stock speed. The default setting for Command Rate in the Asus BIOS is 1T, which makes it much easier to assure that the A8R32-MVP consistently delivers top performance than the 2T default seen in the earlier A8R-MVP. We are pleased that Asus decided to implement the more sensible 1T timings in the update to the A8R-MVP.
Running four double-sided 512MB or 1GB DIMMs is much more demanding than running two DS DIMMs, and Asus did not have any special magic here. Like every board that we have tested, except the DFI RDX200, we needed to drop the Command Rate to 2T with 4 DS DIMMs. This really should not be a surprise, since the DIMM timing is primarily a function of the memory controller on the AMD processor. With 4 DIMMs, the A8R32-MVP remained stable with the same aggressive 2-2-2-8 timings that worked best for two DS DIMMs.
*8T was determined by MemTest86 benchmarks to deliver the widest bandwidth with the ATI RD580 chipset. While the board would operate at tRAS of 5T or lower all benchmarks were run at 8T.
In past reviews, memory bandwidth tests established that a tRAS setting of 11 or 12 was generally best for nForce2, a tRAS of 10 was optimal for the nForce3 chipset, a tRAS of 7 was optimal for the nForce4/ATI RD480/ULi M1697 chipsets, and a tRAS of 10 produced the best bandwidth on the ULi 1695.
Since this is our first review of a board with the new ATI RD580 chipset, tRAS timings were first tested with memtest86, a free diagnostic program with its own boot OS that will boot from either a floppy disk or optical disk. Bandwidth of OCZ PC3200 Platinum Rev. 2, based on Samsung TCCD chips, was measured from tRAS 5 to tRAS 15 to determine the best setting.
| Memtest86 Bandwidth Asus A8R32-MVP with Athlon 64 4000+ |
|
| 5 tRAS | 1879 |
| 6 tRAS | 1879 |
| 7 tRAS | 1999 |
| 8 tRAS | 2043 |
| 9 tRAS | 1999 |
| 10 tRAS | 1958 |
| 11 tRAS | 1958 |
| 12 tRAS | 1879 |
| 13 tRAS | 1870 |
| 14 tRAS | 1843 |
| 15 tRAS | 1807 |
The tRAS setting that produced the highest memory bandwidth with the ATI RD580 chipset was 8. The tRas 8 setting was used for all memory testing on the Asus A8R32-MVP Deluxe.
Memory Stress Testing
The Asus A8R32-MVP easily handles 2-2-2-8-1T timings at stock speed. The default setting for Command Rate in the Asus BIOS is 1T, which makes it much easier to assure that the A8R32-MVP consistently delivers top performance than the 2T default seen in the earlier A8R-MVP. We are pleased that Asus decided to implement the more sensible 1T timings in the update to the A8R-MVP.
Running four double-sided 512MB or 1GB DIMMs is much more demanding than running two DS DIMMs, and Asus did not have any special magic here. Like every board that we have tested, except the DFI RDX200, we needed to drop the Command Rate to 2T with 4 DS DIMMs. This really should not be a surprise, since the DIMM timing is primarily a function of the memory controller on the AMD processor. With 4 DIMMs, the A8R32-MVP remained stable with the same aggressive 2-2-2-8 timings that worked best for two DS DIMMs.
| Stable DDR400 Timings - 4 DIMMs (4/4 DIMMs populated) |
|
| Clock Speed: | 200MHz |
| CAS Latency: | 2.0 |
| RAS to CAS Delay: | 2T |
| RAS Precharge: | 8T* |
| Precharge Delay: | 2T |
| Command Rate: | 2T |
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ocyl - Wednesday, March 1, 2006 - link
Page 4 mentions that there is an Asus board called "A8N32-MVP." Does anyone know where to find more information about this board, if it does exist?Gary Key - Wednesday, March 1, 2006 - link
It should have read A8N32-SLI and has been corrected. Thank you.Darthb0b0 - Wednesday, March 1, 2006 - link
I'd like to see numbers of both X1800 and X1900 Crossfire, on both the A8R and A8R32 (four sets of numbers for those who are math impaired). I am much more interested in how this new board, and its price premium, affect Crossfire performance.nicolasb - Wednesday, March 1, 2006 - link
Can we have some comparable benchmarks for 7800GTX 512 as well as 7800GTX? And 7800GTX 512 in SLI mode too.whippingboy79 - Wednesday, March 1, 2006 - link
**"The NVIDIA 7800GTX and ATI X1900XT are readily available for purchase in the marketplace. Since the 7800GTX 512 is not available for sale anywhere and has not been available for weeks, it seemed unfair to compare x1900XT results to products that are not available for purchase."**Please don't take this personally Anandtech but your reviews are seriously flawed...
This article should of only been written if the proper hardware was available for testing.
If that was the case then the article should review a X1800XT Crossfire vs the 7800gtx 256 SLI in the A8R32-MVP.... These cards are based on competing technologies 2-3 quarters ago..... The X1900 series cards are based on current technologies as are the new 7900 from Nvidia and some might throw in the 7800gtx 512-
Back in december the 7800gtx 512 was readily available on launch- give the 1900xt another 2 months and we will see what the availability of the product looks like. Even now the 1900xt is in low quantities.. give it another 3 weeks and well you get the picture.
I have been finding that some of the Anandtech writers are not objective enough. They have a habit of allowing thier personal views and tastes on hardware flaw their testing and results. Sadly I can still recall the days when Anandtech was a viable resource.....
dali71 - Wednesday, March 1, 2006 - link
That's funny, I just checked three of the main reputable online vendors and found that they all appeared to have plenty of the X1900 series in stock and priced reasonably as well (reasonable being a relative term when referring to high end video cards). I then checked the same three vendors for the 7800GTX 512. Only one actually had listings for the cards, but they were all backordered and ridiculously overpriced as well. So since you are obviously a biased Nvidia fanboi, why don't YOU give it another 3 weeks to 2 months and see if you can extract your foot from your mouth when X1900s are still readily available.Sh0ckwave - Wednesday, March 1, 2006 - link
Seriously you guys need to stop flaming every article Anandtech publishes. Get over it, if you don't like their reviews don't read them. IMO Anandtech is still the best and always has been.Matthews316 - Wednesday, March 1, 2006 - link
I would have liked to see a side by side graph comparison of these two boards with crossfire enabled. That way we could get an idea if the dual x 16 PCI-E slots on the A8R32-MVP made any significant gaming performance improvement over the dual x 8 PCI-E slots on the A8R-MVP. Otherwise I really enjoyed the review, and I'll probably be purchasing one of these boards once the price settles down a little.Beenthere - Wednesday, March 1, 2006 - link
Well, well, well - the disappearing Asus Mobo Hype. I lost count is this the forth or fifth hype posting in the past ten days that has been up, down, up, down, up, down and a real jerk around?After the abortion A8R-MVP Asus shipped as a designed for "serious overclockers" piece of garbage, they can stick the A8R32 where the Sun don't shine. The A8R-MVP was the most over-hyped under performing mobo ever sold and IMNHO a fraud as it doesn't come even close to delivering the advertised performance Asus claims.
I find it amazing how Asus feeds Anandtech all the info. they desire but Asus can't or won't fix the defective A8R-MVP mobos that have documented memory incompatibility issues, 1T timing issues, vcore voltage issues, MVP card issues and more. Asus has the balls to dump the defective A8R-MVP mobo into the marketplace and then flat refuse to even support this malfunctioning mobo or even discuss with their customers any solution to the long list of problems. Asus completely ignores its customers and has provided no BIOS upgrades that fix any of the listed problems above. Once upon a time we had good Asus mobos but for the past several years Asus has been unable to deliver any reliable, properly functioning mobos. It took them four different SLI models to get an SLI32 mobo that performs equal to every other mobo companies SLI X16 mobo, so you gotta believe Asus has engineering issues.
As if to illustrate how gullible some consumers are the A8R32 addresses some but not all of the problems on the A8R-MVP that according to Anandtech and Asus were not problems at all. This must be like with MICROSUCKS where bad security code isn't a defect it's a "feature". It's amazing the B.S. that is published to suck up to unscrupulous manufacturers. The disguised damage control is for the naive who don't have a clue. If a S939 mobo can't run standard industry DIMMS in 1T and the vcore voltage varies 100 mV or more, the mobo is a problem child. The fact that Asus still deletes the proper vcore voltage options in BIOS on the A8R32 tells me they still have engineering problems IMNHO.
Sorry Wes but these Asus reviews are not objective scientific tests any more they are just marketing hype. It looks like you're way too close to Asus to tell the whole story instead of regurgitating the glowing marketing hype. When Asus recalls all of the defective A8R-MVP mobos and replaces them with properly functioning A8R-MVP mobos, then they'll prove they have their act together and that they care about their customers. Otherwise IMNHO they are just an unscrupulous company dumping defective goods into the marketplace to defraud consumers.
Looks like there is little value in reading Anandtech any more as it's become unreliable just like THG did after Tom left. We ain't buying the hype and Asus can shove their entire product line where the Sun don't shine. They may have made short term profits by defrauding A8R-MVP buyers with defective goods, but in the long term they will lose a lot of customers to other mobo makers.
theprodigalrebel - Wednesday, March 1, 2006 - link
i was almost paying attention to your post, but you lost me when you wrote 'microsucks'.stupid troll.