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  1. Hello MSFN, i recently installed Windows XP under a Ryzen 3 1200 machine with the A320 chipset. I initially found the ACPI was incompatible, 0x000000A5 BSOD if i recall correctly, so i replaced the ACPI driver in the ISO with a newer, community-modified one that fixes the problem. Everything now seems to be working fine, except one thing: I realized Windows XP Home Edition was only recognizing 2 cores out of the total of 4 cores the processor has. At first i wasn't very sure why was that happening. I first tried switching different BIOS options to check if that was the problem, as well as revising Windows configuration, but that didn't help. I then decided to do some testing: First, i installed Windows XP Home Edition (ACPI fixed ISO) under my AMD FX-8300 machine, as it has 8 cores. If the problem was also present there, it would have nothing to do with Ryzen. I have Windows 7 on my machine, and installed XP Home Edition on a different hard drive (having the other one unplugged). As expected, Windows XP Home Edition detects all my cores perfectly (detailed screenshot). Now let's see what happens when i install Windows XP Home Edition (with the exact same ISO image i used with the AMD FX). The machine has Windows 8.1 installed and i'm installing Windows XP Home Edition on a different hard drive (having the other one unplugged). As i said earlier, only 2 cores are recognized (detailed screenshot). I was already guessing what could be the cause of the problem, so i proceeded to install Windows XP Professional Edition, with the exact same ACPI fix and... It detected all cores as should (detailed screenshot). I'm aware XP Home Edition supports up to 1 physical processor, while XP Professional supports up to 2 physical processors, but that doesn't make much sense in this context as the Ryzen 3 1200 is a single physical processor. I believe the Ryzen architecture is modularized at silicon level (you can see here the 1200 has 2 modules), but everything is still under the same die. The AMD FX architecture is also fully modularized, each module having 2 cores and 2 threads (the FX 8300 has a total of 4 modules), but doesn't suffer from this problem. As a last resort, i considered the system might actually be using all cores, but after doing some benchmarks, that was clearly not the case, and it seems the system is just using two. You might now suggest we should just use Professional Edition as that one seems to fix the problem... But if you think about it, if the root problem is XP recognizing each Ryzen module as an individual physical processor, then, Zen 2 processors, which are more modularized than the predecessor microarchitectures, will suffer from this exact problem on both Home and Pro, let alone the Ryzen Threadripper. Using Professional Edition seems to only be a solution for those using older and less powerful Ryzen CPUs. Using Windows Server 2003 could also be considered a solution, but given how very few people has licenses for it, is not a very practical one. Furthermore, i couldn't make the ACPI driver patch work with it (although it might be possible to get it working and i'm not aware). At this point i'm starting to believe this is caused because of a bug within the Windows XP physical processor detector, or either, a BIOS bug, but that last one seems less likely. I'm usure if there's already a solution for this, that's why i'm asking here. Has anyone tried Ryzen with XP and had the same problem? I couldn't find much information regarding this as the XP Ryzen scene is quite small. If there's no known solution, i'd be interested to look forward for a fix to this. Any information that could get us closer to a solution is highly appreciated. If anyone interested has a Ryzen processor, you can try installing XP on your machine and telling us your results. Thanks in advance for all your help. Further details worth considering: - All Windows XP ISOs used are original and untouched (en_windows_xp_home_with_service_pack_3_x86_cd_x14-92413.iso, en_windows_xp_professional_with_service_pack_3_x86_cd_x14-80428.iso). The only thing i did was replace the ACPI driver, as well as adding USB3 (for usb3 install) and AHCI drivers (motherboard lacks IDE). I've done the exact same procedure with Professional and Home Edition to include the drivers to the ISO file. - All the Windows settings were left as they were out of the box. Nothing within the system configuration has been changed.
  2. Hey everyone. Is it possible to use Windows8.1 on ryzen 3000? Did anyone tried it? Someone told me that with windows 7 drivers its possible but i don't have ryzen system to test it on
  3. Hi, Folks, long story short: I tried the Ryzen/AM4 platform, and failed. (This was to be expected, but, hey, until you try out, you never know.) ---------------------------------------------------------------- Reasons, short and sweet: ---------------------------------------------------------------- The memory management of DOS (and W98SE in consequence) is not compatible with this board/chipset, possibly due to "memory fragmentation" (ask RLoew about this... ), which is not a problem for, i.e., WIndows 10 64bit. This shows in DOS already, as i wasn't able to start setup, as the partition-data weren't recognized. And later, with an "imported" W98SE, only 157MB showed up, and the standard-VGA showed a scrambled desktop, which also points to problems with handling the meory correctly. All other symptoms are a mere consequence of this. The PC, enhanced by a powerful GPU and a nice RGB-case, will be a convincing birthday present for my son... ---------------------------------------------------------------- Components used: ---------------------------------------------------------------- Ryzen 5 1600X 16 GB DDR4 3200 Ram ASRock X370 Gaming X (for the 8x/8x constellation for Dual-GPU-stunt, and for two separate PS/2-ports) Geforce 7600 GT 256 MB (Rloew patch for Interrupt problems installed, just in case, but also without) PCI SATA Controller with 60GB Sata II SSD SuperTalent GX2 and IDE DVD on PCI-to-PCIe adapter SB Audigy on PCI-to-PCIe adapter. Some w98se-compatible PCIe GB Lan.... i don't care yet... ---------------------------------------------------------------- What worked: ---------------------------------------------------------------- DOS with Ushers XrAyeRs method. PS/2-keyboard Then booting into w98se... PS/2-Mouse SSD/DVD (sort of) ---------------------------------------------------------------- Symptoms of failure: ---------------------------------------------------------------- Setup in DOS wouldn't start, not accepting partition-data (by my experience, a problem that can only be attributed to memory-problems, once HDD-problems were tested for). I did an import of an already installed and ready-patched W98SE with drivers of all used components (as far as possible). Only 157MB showed in System. Starting with standard VGA, the screen was already scrambled, though readable. Hardware-detection failed for most components: Many devices were found by name, but except for "motherboard ressources" and some "bridges", few was detected or equipped with some kind of driver or setting finally (even though w98se tried valourously). A long list of yellow questionmarks and blue motherboard ressources in System, that's it for the most of it. I tried to activate the NVidia-driver for the 7600GT. It said it would. Result: Screen switched to black, and stayed that way. Going to safe mode brought back the scrambled screen. --------------------------------------------------- @RLoew: Thanks for your steady support and assistance! That's it, next platform...
  4. Hi, did anybody here try XP (32bit or 64bit) on the Ryzen/AM4 platform? What was the result? Which HW did you try? P.S.: I found only two threads that mentioned XP on Ryzen at all. If, for some reason, i failed at searching on MSFN, and missed YOUR thread, just throw in a link to that thread here. Thank you! P.P.S.: I don't own a Ryzen yet, i'm still evaluating if i invest that money. If i did already, i'd not post questions, but results... P.P.P.S.: If you did NOT try, please help keeping this thread compact, by opening a new thread for rants on why not, or why to use a VM, or whatever. This thread is meant for people trying on hardware. Thanks for your cooperation...
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