BX300A wrote on 2026-09-17, 10:32:
VIA and SIS dominating the top results here is upsetting my 440BX apple cart and I don’t like it. Am I so out of touch?no it’s the chipsets who are wrong
To be honest, what more could you expect from an old-school chipset from 1998? 😄 Sure, it gives legendary stability and unmatched memory latency(it beats even SiS635T....), but it also comes with a ton of drawbacks:
- AGP restrictions: Its AGP 1.0 port completely locks you out from running newer 1.5V / 0.8V cards (as mentioned by shevalier), which is a huge bottleneck.
- Picky RAM: You are strictly restricted to double-sided RAM sticks, which can really hold you back when picking hardware.
- CPU compatibility: It natively uses FC-PGA1. The lack of native Tualatin support can be problematic for some users who don't want to deal with modding or finding rare adapters.
- FSB ceiling: It is really hard to push iBX to a stable 166 MHz and beyond. Most boards will simply give up at around 155 MHz FSB. But even if you are lucky enough to push through that limit, there is the divider problem....
- The divider issue: While it has a proper 1/4 divider for the PCI bus at 133 MHz (keeping PCI at a safe 33 MHz), it completely lacks a proper 1/2 divider for the AGP bus. Therefore, this forces the AGP port to run at a heavily overclocked 89 MHz, which many high-performance graphics cards simply cannot handle. Furthermore, even if you miraculously manage to push this motherboard to 166 MHz+ FSB, the AGP port will lock you out from installing most top-tier cards (BTW, SiS chipset is the one to offer 1/5 and 1/6 dividers)
Personally, I was able to run only a few tests with the iBX at 166 MHz FSB, but I tested only one motherboard, IIRC. You can find some info here:
Project "TualGOD": Pentium III-S 1,4 GHz @ 166 FSB = 1750 MHz - 5 chipsets comparison
PcBytes wrote on 2026-09-17, 11:31:
Sorry for me being MiA. Life quite got in my way.
Anyways @BX300A, I should have a CUBX-L and Coppermine 1GHz ready. Will need to see what I can do. I sold the ST6 w/ the super-overclocked Tualatin (from 1.13GHz to 1.58GHz, an insane 185-ish MHz FSB)to help my elders financially.
Some of the ST6 results. No more results than 3DM99 unfortunately.
Nice! But ST6 is capable of much more 😀
When it comes to the i815 chipset, it can easily go beyond 200 MHz. Most boards I've tested reach at least 210 MHz. The stable limit was something around 235 MHz:
This is, of course, with a Coppermine CPU. Tualatins naturally won't go that high on air... So what you expect from a Tualatin core?
• 1133 MHz (tB1): Most of them will easily exceed 200 MHz FSB.
• 1266 MHz (tB1): 185/190 MHz should be achievable for most, but if you get really, really lucky, 200 MHz is possibile as well.
https://www.youtube.com/watch?v=SnS8KYfv7fg
• 1400 MHz (tB1): This is the most interesting case. 😀 Most SL6BY CPUs hit a wall around 160–165 MHz. You have to do a lot of binning to find a truly unique one.
Nevertheless, a STABLE 166 MHz is possible EVEN AT DEFAULT VCORE as you can see 😀 I was able to reach stable 181 MHz at 1.75V Vcore maximum (after a delid)
https://www.youtube.com/watch?v=YGDogB2ueoc
enaiel wrote on 2026-09-18, 04:08:I don't have a hot-rod machine, but this seemed like a good opportunity to use my very own VIAFSB tool to do some overclocking f […]
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I don't have a hot-rod machine, but this seemed like a good opportunity to use my very own VIAFSB tool to do some overclocking for a change, instead of just down-clocking.
Using my Boring Tualatin Win98 build, I was able to overclock the FSB to 145. Before I upgraded to CL2 RAM I was able to reach 150, but this RAM does not like 150.
- Motherboard: QDI Legend Advance 10T [P6V694T/A10T]
- Chipset: VIA PRO133T / 694T [VT82C694T + VT82C686B]
- CPU: Intel Pentium III-S Tualatin 1.40GHz 512/133 [SL5XL]
- RAM: 512MB PC133 133 MHz CL2 SDRAM
- Video: MSI MS-8894 NVIDIA GeForce 4 Ti 4200 64MB AGP [Ti4200-VTD8X]
The attachment qdi_a10t_bench.png is no longer available
This is awesome 😁 I will try to test it on my boards 😉 Thank you!
Your results can be easily improved 😀 Please switch from SL5XL to SL6BY if you can find one, and your FSB will reach at least 160 MHz. 😉
Also, look for those high-quality memory modules:
Then, you won't have to worry about CL2 even at the maximum FSB.
BTW @PcBytes are you gonna update the results on the first page? 😉
