Abit AT8: µGuru comes to the RD480
by Gary Key on March 10, 2006 12:05 AM EST- Posted in
- Motherboards
Abit has a long and storied history as a top manufacturer of enthusiast level boards that catered to the overclocking community. Abit found itself in trouble over the past couple of years and for all intents and purposes, it was close to ceasing business operations. Fortunately, they entered into a long-term partnership with USI this past January that should ensure their financial health for the foreseeable future. This strategic partnership also signals a return of Abit to their roots as a company driven to provide the computer enthusiast and extreme overclocker with the highest performance solutions available. Although Abit just recently announced the AT8 32X motherboard based on the ATI CrossFire Xpress 3200 Northbridge (RD580) and ULi M1575 Southbridge, we will be looking at the AT8 motherboard based on the ATI CrossFire Xpress 200 Northbridge (RD480) and ULi M1575 Southbridge solution. More information about the entire line of Abit products can be found here.
During our testing and general usage of the Abit AT8, we found the board's stability to be excellent and it delivered top results in the latest synthetic and game benchmarks once we were provided with an updated BIOS. However, our initial tests with the current 1.0 BIOS were not positive as the board suffered memory capability issues with our BH5/UTT chip based memory modules. The board refused to hold a CAS latency setting of 2 after reboot with the BH5 memory modules and would fail to post if the CAS latency setting was set to 3. The board also showed some post and incompatibility issues during testing with 1GB memory modules based upon Samsung UCCC chips.
However, the board worked fine with our Infineon based memory modules. We also noticed a disk corruption issue during RAID 0 operation with the stripe size set at 16k. We did not have this issue with the stripe size set at 64k.
We reported our issues to Abit and they promptly provided an updated BIOS, version 1.1, to use for our testing. We noticed our memory incompatibility issues were resolved for the most part and updated microcode for the ULi M1575 chipset solved our RAID setup issues. We have still witnessed a few memory issues that occur when switching memory modules without having set the DRAM setting in the BIOS to SPD. Also, the board requires a CMOS clear when extending the memory settings beyond the capability of the board or memory. The system will gracefully recover from errant CPU settings, but is still reluctant to recover from memory issues. We generally found that setting the memory settings manually or utilizing the SPD option had worked well as the Auto setting seemed to have the majority of issues when setting up the board or during overclocking.
However, the current iteration of the 1.1 BIOS introduced an issue that Abit is still trying to solve at this time. The board is an excellent overclocker when utilizing the stock multiplier. Our testing has revealed an issue with the beta 1.1 BIOS where the HTT setting does not like to be raised past the maximum HTT setting utilized with the stock multiplier. As an example we had no issue overclocking our AMD Athlon 64 4000+ to a 322 HTT setting at a 9x multiplier with the version 1.0 BIOS but could not reliably exceed a 256 HTT setting with the 1.1 BIOS which was the maximum setting at the stock 12x multiplier. We tried four different AMD processors and witnessed the same results in our testing. We tried various combinations of memory, video card, and power supplies along with numerous system settings without success. Abit is working on this issue currently and we expect to have an updated BIOS for further testing shortly. We would like to commend the engineers at Abit for their cooperation and diligence in working with us on these issues, but we sincerely hope that an optimized BIOS is released shortly for the existing users of this board.
Let's see how the Abit AT8 compares to the competition.
During our testing and general usage of the Abit AT8, we found the board's stability to be excellent and it delivered top results in the latest synthetic and game benchmarks once we were provided with an updated BIOS. However, our initial tests with the current 1.0 BIOS were not positive as the board suffered memory capability issues with our BH5/UTT chip based memory modules. The board refused to hold a CAS latency setting of 2 after reboot with the BH5 memory modules and would fail to post if the CAS latency setting was set to 3. The board also showed some post and incompatibility issues during testing with 1GB memory modules based upon Samsung UCCC chips.
However, the board worked fine with our Infineon based memory modules. We also noticed a disk corruption issue during RAID 0 operation with the stripe size set at 16k. We did not have this issue with the stripe size set at 64k.
We reported our issues to Abit and they promptly provided an updated BIOS, version 1.1, to use for our testing. We noticed our memory incompatibility issues were resolved for the most part and updated microcode for the ULi M1575 chipset solved our RAID setup issues. We have still witnessed a few memory issues that occur when switching memory modules without having set the DRAM setting in the BIOS to SPD. Also, the board requires a CMOS clear when extending the memory settings beyond the capability of the board or memory. The system will gracefully recover from errant CPU settings, but is still reluctant to recover from memory issues. We generally found that setting the memory settings manually or utilizing the SPD option had worked well as the Auto setting seemed to have the majority of issues when setting up the board or during overclocking.
However, the current iteration of the 1.1 BIOS introduced an issue that Abit is still trying to solve at this time. The board is an excellent overclocker when utilizing the stock multiplier. Our testing has revealed an issue with the beta 1.1 BIOS where the HTT setting does not like to be raised past the maximum HTT setting utilized with the stock multiplier. As an example we had no issue overclocking our AMD Athlon 64 4000+ to a 322 HTT setting at a 9x multiplier with the version 1.0 BIOS but could not reliably exceed a 256 HTT setting with the 1.1 BIOS which was the maximum setting at the stock 12x multiplier. We tried four different AMD processors and witnessed the same results in our testing. We tried various combinations of memory, video card, and power supplies along with numerous system settings without success. Abit is working on this issue currently and we expect to have an updated BIOS for further testing shortly. We would like to commend the engineers at Abit for their cooperation and diligence in working with us on these issues, but we sincerely hope that an optimized BIOS is released shortly for the existing users of this board.
Let's see how the Abit AT8 compares to the competition.
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Gary Key - Friday, March 10, 2006 - link
Abit plans on this board becoming a value performance leader with the AT8-32x being slightly more upscale in the price range. We will be reviewing this board once it is available. However, given the current price range of the RD580 boards, the RD480 boards are the better value at this time given the incremental performance differences of the RD580 (although this would be my personal choice).
There have been some growing pains with the ATI chipsets but there were also growing pains with the NVIDIA/SIS/VIA/ULi/ALI/Intel/etc. chipsets at product launches also. :) Overall, both the ATI RD480 and RD580 are very good chipsets, the fact the SB600 Southbridge was not available in time for either product launch is where I think ATI failed. This forced the board suppliers to utilize a Southbridge solution (ULi M1575) that was not designed in conjunction with the RD480/580 Northbridge. While it is an excellent Southbridge solution, some of the storage access and timing issues that have been reported and now solved, were not seen on the few SB450 equipped boards. I personally expect the ATI equipped boards to mature quickly and provide an excellent competitive alternative to the nForce boards. This is good for all of us.
n7 - Friday, March 10, 2006 - link
Even with the OCing issues, this is still a far better value Crossfire choice for anyone than the craptastic A8R-MVP