bloodem wrote on 2023-07-05, 14:14:
Admittedly, I have a fairly small sample size (only 7 x Ezra-T 1 GHz at this point), but they all work flawlessly at 1.26 GHz (most at the default voltage of 1.45V, only one or two need a bump to 1.5V).
As for 1.33 GHz, only one of my Ezra-T CPUs is fully stable at this frequency, and it needs 1.55V to achieve 100% stability (it's still nice and cool when running at that voltage, though).
I think I will keep mine at 1Ghz then. Technically, I can do it in software since my BIOS doesn't have multiplier control and the ones jumpered on the motherboard are ignored (and are too low anyways). SMB and Setmul work fine though (which is fortunate, since my clock generator is either counterfeit silicon or defective), so I can take it down to 2ooMhz (but cannot go above 1Ghz or 100mhz FSB -- I have no idea what the clock IC really is, only that it is labeled ICS9148BF-26, and I could not find something equivalent from ICS/Renesas from that time that was pin compatible so it is a mystery to me).
Looking at this table, which setting do you think resembles a 486/DX-33 the most? If I go lower to say 150Mhz (50Mhz FSB x 3), how much slower is that in your experience with regard to the chart (486 SX territory perhaps)?
Well, I would't say that...
As mentioned, based on my experience, the Ezra-T is basically guaranteed to run at 1.2 GHz (FSB133 x 9), if not more. 440BX motherboards are also (almost) guaranteed to run perfectly at FSB133 too (even the cheaper ones).
At this frequency, this platform is hands down faster than any SS7 platform out there (no matter how much you overclock and fine tune the latter).
Hey, you don't have to convince me... I completely agree -- best case scenario with K6-III+ isn't realistic for most people, and the puny VRMs on these SS7 motherboards aren't all that appealing either. BX motherboards are a class above anything from that era. Even the most inexpensive ones have proper VRMs.
Last but not least, at the time of this writing, it's also cheaper compared to a SS7 platform.
Well, technically, yes... But finding the needle in the haystack motherboards with clock generators that are RayeR SMB-compatible makes Ezra-T more expensive, in my opinion. I contacted RayeR, he said he would consider adding more support, but don't hold your breath (my words)...
Yes, you're absolutely right about SS7 motherboards... Didn't like ALI at all, and VIA might be better, but I don't like their pre-Athlon southbridge controllers (buggy IDE). You are far more generous in your nostalgic feelings for them. I had both a P5A and P5A-B (latest revisions) and was glad to get rid of them.
I have my Ezra-T tested now and working properly, I'm going to pair it with a Voodoo3 2000, and it's going to serve as a good DOS/Win98 "slow" system... For Win98 "fast" I have the AsRock AGP board you benchmarked here with the C2D (as well as system already built with a P5PE-VM), but I'm going to start experimenting with PCIe platforms for Wndows 98 (VIA and Intel) and the GeForce 6800... I don't see any downsides to this, because the Win98 "slow" system can compensate for any games that don't function with the drivers required for the 6800 (though the 6800 drivers do support table fog).
What's left then for complete coverage in terms of games compatibility is a real 486 (have one) and 386 (in the process of being built). The prior for better VESA compatbility than the Voodoo3 can offer (Trio64 VLB), and the latter for older titles that require it. If I had a Voodoo2 SLI, I could use that with the Ezra-T paired with some generic S3 Virge and then I wouldn't need the 486, but the Voodoo2 SLI is like a white elephant.
I draw the line at XT and 286. Nice to watch videos about them while sitting on the loo, but no need to own one in real life... Let the Apple and Commodore people have them.