MemTest86 already has a rowhammer test, not sure how it compares to blacksmith but some sticks I have do fail that test and can only be mitigated by setting tREFI extremely low (while also taking a large performance hit).

Most of the higher end hynix/micron/samsung sticks I've tried do not fail at JEDEC or XMP after 7+ passes.

Yeah, that looks correct. With faster ram and PBO it should hit closer to 1800.

Here is my 5600x with PBO enabled and 3800MT/s CL16 DDR4 https://browser.geekbench.com/v5/cpu/10516280

5800x would have a max clock of 4950mhz with PBO

That's certainly overclocked or very high PBO offsets, at stock the 5800x gets around 1700-1800 ST.

Single core is similar to the 5900x but multicore is more in line with 3900x.

Quite impressive for a laptop, I'm sure the power consumption will be much higher compared to the M1 but likely no where near desktop parts.

Same. Doesn't hurt that they were $50 on sale. I've had them for over a year with no issues.

Sandy-E to Haswell-E i7's do not officially support 128gb, though there have been reports of it working.

Broadwell-E i7's now officially support 128gb.

All the Xeon equivalents (e5-1650/60,80, etc) support 256-768gb depending on the model, if paired with a consumer board that limit is usually 64-128gb.

That is your experience. A properly set up Hackintosh (with a custom DSDT and the proper kexts as needed) can be as reliable as a genuine Mac.

Regarding Windows machines, I've had desktops that would be used for months at a time (mostly rendering) without a restart and never crash.

A pretty good way to test for reliability is to let Prime95 and Memtest86 run for a week or so and see if it fails somewhere along the line (obviously proper cooling is a must), many consumer machines will fail this test.

You sound pretty confident in it, so here's a question from a perspective more relevant to the discussion:

Would you found a company and make your primary product hackintosh servers? Are you willing to stand behind your 'perfect' configuration and give those customers years of support?

These guys are running a real startup. A vendor with that exact promise and a failed delivery could tank them.

Currently, no.

1. Apples EULA does not allow OSX on non-apple hardware. 2. Some major updates can break customizations and require some modifications (bootloaders, etc) to be re-installed

I have no problem helping a friend set up a Hackintosh when they want to save a few thousand dollars (I have set up a few already) with the understanding that they need to backup before doing any system updates and expect things to break after updating.

While Hackintosh's work well for personal use as long as you are somewhat techy and pick the hardware carefully, (putting aside the EULA issue) it does not make sense for anything large scale.

Any time I buy a used board I check the board carefully for any kind of modification or odd looking solder joints and re-flash the bios/uefi with the latest version.

Of course something could still be modified, but so could a board direct from amazon or newegg I suppose.

I'm not sure why they even considered P4's, the pre-prescott P4's don't even have Speedstep. That means they run full voltage/speed all the time which is terribly inefficient.

Core 2 Duos are much more energy efficient, they are not in short supply by any means and cost about the same used ($2-3).

Core 2 Duos and Pentium Dual Cores under 3ghz are fairly energy efficient chips (~65w) and they use Speedstep, etc to keep power consumption low at idle.

Of course newer dual cores and more modern chipsets will use less power overall, although for less demanding uses (web, word processing) I'm not sure if there would be a huge difference.

P4's on the other hand...