Good to know. I've got others running Win 10 on 2 GB just fine, but was in fact thinking of spending $20 on a pair of used 2GB sticks for the D820. There is definitely a noticeable difference with 4GB!
I believe the key to running 10 at reasonable speed on 2GB is having a graphics card with WDDM drivers and with a sensible amount of its own video RAM. And then, nothing special is required - see my specs - it's not apparently slow - in fact XP, 8.1 and 10 have similar boot times of about 1 minute, and are similarly, comfortably responsive in use.
The only time it's noticeably slow is during the Windows 10 setup and upgrade, when I believe WinPE uses generic graphics drivers and dedicates 1GB of system RAM to the GPU - which is intolerable - and does not go back to dedicated graphics until the last phase of sysprep, when things speed up again.
Got to admit failure (at this point) on putting Win 10 on a Dell XPS Gen 5 desktop system. It would not install directly regardless of the method I used, so I tried an end-run. I took a Win 10 HDD from a newer system and moved it over to the XPS. It loads the Win 10 logo but hangs there. I believe that it is related to the BIOS not supporting some needed CPU calls. The BIOS is at A04 which is the highest supported by Dell. Also, the 955 chipset on the MB may not be good enough to meet Win 10 needs. Looks like they are destined for Unbuntu since it loads and runs very well.
Amtronic - have you tried the 32-bit version, or just the 64-bit? Being a very early 64-bit Intel processor, it may not support CMPXCHG16B - but I have no information on this.
Like the Prescott Pentium 4, the Pentium EE840 has SSE2, PAE and NX, and the LGA775 socket and Hyperthreading. The Pentium 4 runs Windows 10 x86 versions well.
I also wonder if the Graphics system on the XPS, although excellent at the time it was released, is not supported by Windows 10.
Last edited by Fafhrd; 09 Mar 2016 at 08:08.
Depends on what one calls "old". IMO the D820 is semi-old. I've upgraded about 30 machines thus far but not a D820. You might want to take a look at this article. Seems as though it has been done successfully. http://dellwindowsreinstallationguid...nd-8-1-64-bit/ Be sure that your bios and all drivers are up to date on Windows 7 before you start the upgrade. I'd make a full system backup just in case something goes wrong.
Not so lucky with the XPS system. I had already upgraded the video card to a 2gig NVIDIA GT 640 adapter. It has an Intel Pentium Extreme Edition 840, with 2 Cores, running at 3.6GHz. I guess speed isn't everything! From the Intel compatibility tests, it does not support LAHF/SAHF and PrefetchW functions. It fails with both the 64 and 32 bit versions of the 1511 release. Maybe a future as an Unbuntu server? I do love the big old clunky beast.
I've found that Windows 10 setup seems to get confused by unsupported hardware and fails to assign IRQ and resource values correctly - leading to failed, or worse, partially corrupted setups.
If it is possible to disable as much as possible in BIOS, or by physically removing hardware, so that only basic subsystems are present, you may get through the setup to a minimal working system.
Only then try to add in the offending hardware piece by piece, and if necessary, load drivers in compatibility mode.
Obviously, memory and hard disk, display adapter, monitor and keyboard/mouse are a bare minimum.
Anything else - network adapters, wifi, bluetooth, Optical drives, USB storage and hubs are dispensable at first.
Chipset drivers are the key to power management and I/O function efficiency, and should preferably be sourced before setup is performed, installed first after setup has completed, and then add the other devices, one by one.
Last edited by Fafhrd; 04 Mar 2016 at 17:31.