Asus A8N32-SLI Deluxe: NVIDIA Dual x16 for the Athlon 64
by Wesley Fink on November 6, 2005 9:00 AM EST- Posted in
- Motherboards
Overclocking: Asus A8N32-SLI Deluxe
The Asus A8N32-SLI set a new stock speed overclock record with this CPU at 246. This is likely a result of the excellent 8-phase power regulation of the Asus board, which greatly contributes to cool operation – even when pushed hard.
Lowering the multiplier to reach the highest CPU clock also yielded excellent performance – at 310 among the highest that we have tested. This Asus has an outstanding assortment of memory timing and voltage adjustments for overclocking, but they are somewhat unfamiliar. Given more time with this board, it is likely that we could achieve even higher reduced multiplier timings as we become more familiar with the memory adjustments. In general, the HyperTransport performs well when left on Auto, letting the board handle the HTT adjustments.
Other top overclockers like the DFI nForce4 series have extensive adjustments for tRef and Driving Strength. Best overclocking performance is often achieved on the DFI by reducing DDR Driving Strength with Samsung TCCD. The Asus has more limited Driving Strength and tRef adjustments, but it offers an extremely wide range of DDR Skew adjustments, which are missing from many enthusiast boards. The point is that Asus has taken a little different approach to controls, and it will take time to learn what works best with the available memories.
Asus also offers full Auto settings for those who do not wish to delve deeply into the BIOS for overclocking. There are even Auto Overclocking options in the BIOS where the board will set all parameters for best overclocking. These work well, but like other Auto OC options, the Asus can be pushed furthest with intelligent manual overclocking.
We were really unprepared for what a great overclocker the Asus turned out to be. The dual x16 is about graphics, and we really didn’t expect the excellent overclocking that this board delivers. It should be pointed out, however, that best overclocks are achieved with a single video card. While we reached 310x9 with a single 7800GTX, the best OC that we could achieve with a 7800GTX SLI setup was about 275.
| Asus A8N32-SLI Deluxe Overclocking Testbed | |
| Processor: | Athlon 64 4000+ (2.4GHz, 1MB Cache) |
| CPU Voltage: | 1.45V (default 1.40V) |
| Cooling: | Thermaltake Silent Boost K8 Heatsink/Fan |
| Power Supply: | OCZ Power Stream 520W |
| Memory: | OCZ PC3200 Platinum Rev. 2 (Samsung TCCD Memory Chips) |
| Hard Drive: | Seagate 120GB 7200RPM SATA 8MB Cache |
| Maximum OC: (Standard Ratio) |
246x12 (Auto HT, 2.5-3-3-7) 2952MHz (+23%) |
| Maximum FSB: (Lower Ratio) |
310 x 9 (3x HT, 1T) (2790MHz, 2 DIMMs in DC mode) (+55% Bus Overclock) |
The Asus A8N32-SLI set a new stock speed overclock record with this CPU at 246. This is likely a result of the excellent 8-phase power regulation of the Asus board, which greatly contributes to cool operation – even when pushed hard.
Lowering the multiplier to reach the highest CPU clock also yielded excellent performance – at 310 among the highest that we have tested. This Asus has an outstanding assortment of memory timing and voltage adjustments for overclocking, but they are somewhat unfamiliar. Given more time with this board, it is likely that we could achieve even higher reduced multiplier timings as we become more familiar with the memory adjustments. In general, the HyperTransport performs well when left on Auto, letting the board handle the HTT adjustments.
Other top overclockers like the DFI nForce4 series have extensive adjustments for tRef and Driving Strength. Best overclocking performance is often achieved on the DFI by reducing DDR Driving Strength with Samsung TCCD. The Asus has more limited Driving Strength and tRef adjustments, but it offers an extremely wide range of DDR Skew adjustments, which are missing from many enthusiast boards. The point is that Asus has taken a little different approach to controls, and it will take time to learn what works best with the available memories.
Asus also offers full Auto settings for those who do not wish to delve deeply into the BIOS for overclocking. There are even Auto Overclocking options in the BIOS where the board will set all parameters for best overclocking. These work well, but like other Auto OC options, the Asus can be pushed furthest with intelligent manual overclocking.
We were really unprepared for what a great overclocker the Asus turned out to be. The dual x16 is about graphics, and we really didn’t expect the excellent overclocking that this board delivers. It should be pointed out, however, that best overclocks are achieved with a single video card. While we reached 310x9 with a single 7800GTX, the best OC that we could achieve with a 7800GTX SLI setup was about 275.
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Wesley Fink - Friday, November 4, 2005 - link
Both the Asus and DFI were definitely running 1 x16 in single video card mode. The single video card results - using the same 81.85/6.82 drivers, video cards, CPU, and memory - were the most surprising results. I really don't have an explanation for the performance differences here, since there is very little performance difference in older titles but a large difference in the just released games. We are hoping nVidia can shed some light on these benchmark results.n7 - Friday, November 4, 2005 - link
This actually looks like a very good mobo.However, knowing Asus, i'm sure we will we won't find it reasonably priced anywhere.
If it came down in price, & they offered a non-SLI version for those of us who don't want SLI, i'd get interested :)
aLeoN - Friday, November 4, 2005 - link
What kind of rich enthusiast wouldn't want to spend top dollar for the top of the line equipment? Don't get me wrong, I'd like exactly what you do but they've only changed to 8 phase cooling and x16 sli over the current nf4 boards right? Imo it doesn't sound like a very profitable idea if you threw phase change cooling onto an A8N-E but I'll keep my fingers crossed for the both of us.Zebo - Friday, November 4, 2005 - link
hehe - the real trick is turning pyrite into gold..Tortise into hare... Anyone can empty thier wallet out or max thier credit card out, as the case may be, on top of the line eqiupment. Takes real skill to turn budget parts into them. IMO.aLeoN - Friday, November 4, 2005 - link
Right on man! I have a friend who demands near top of the line and doesn't hesitate to have something better than our circle of friends. I'm planning a OC rig for just about a grand that would topple his $3000+ (invested in over a couple years) rig, forcing him to upgrade it with his $1500 now (he was saving it till something good came out or me and a couple other friends get something better). It's people like these that drive our economy! =Dgnumantsc - Friday, November 4, 2005 - link
Wes the chart for Far Cry on Single Video shows a percent increase of 0.4% with the numbers showing 74.3 vs. 47.5. Shouldn't it be 74.5?Wesley Fink - Friday, November 4, 2005 - link
The chart is correct, and I did a dyslexic in the table. The correct numbers are 47.3 nad 47.5. The table has been corrected.Zebo - Friday, November 4, 2005 - link
Yes sir just gunna have to wait for another C51 review to see if it's nV's chipset or something ASUS is doing. Definity shocking to see large performance gaps like that so I'm sure you tested and retested and retested after that too.Wesley Fink - Friday, November 4, 2005 - link
Sorry, I will fix the Typo. I made sure all jumpers were reset to single video mode on the DFI and double checked the readout in BIOS before runnign single video tests.Phantronius - Friday, November 4, 2005 - link
Damnit, I spent alot of money on my Asus A8N Premium board. Grrrrrrr...!! I want a 17% boost in single card performance!!!