Optiplex GX520/GX620 System BIOS

[BC_Programmer]

Got the new build 10114 of Windows 10 preview. Same error code.

No need to keep it a secret...

[Computer_Commando]

I don't see it yet.  Still Build 10074.  Same for both links.
http://windows.microsoft.com/en-us/windows/preview-iso
http://windows.microsoft.com/en-us/windows/preview-iso-update-1504

Don't understand why it won't install on the Dell Optiplex GX520.  Try the Windows 8.1 compatibility checker.
https://www.microsoft.com/en-us/windows/compatibility/CompatCenter/Home

Do you get this message?

[patio]

,

[Geek-9pm]

I stand corrected.   
The  build is 1074, not the new version MS is testing.
It runs well on My Dell Optiplex 745.
It does not on the GX 520, the PC of this topic. 
Apparently it is not BIOS bug.
It is a CPU shortcoming.  
(I mean it is for the 64 bit version, Using 32 bit there is no error reported. CPU-Z says  it is a 64 bit CPU and will run 64 bit stuff.)
I have been on this most of the day.
Tomorrow I will show pictures.   

[Geek-9pm]

First of all, thanks to all.
Next, I must apologize for my memory failure.
No, not the PC, my brain.
I should have remembered that I did this before.
But somehow I read something that made me thin it was BIOS.
Really, if you want to run modern OS and Apps on a PC, it has to be unit made in  the past few years. Specifically, 2007 onward.

However, Windows 8.1 32 bit will run on older systems. Photo attachment 1.
With regard to the Dell GX520:
But Windows 8.1 64 bit will five an error message.  Photo attachment 2.
(Windows 10 preview gives same error.)
Using the right Windows 8.1 adviser the detail shows. Photo attachment 3.

This is the end of this.   

[attachment deleted by admin to conserve space]

[patio]

With a 9 year old PC you cannot exactly expect Win10 to co-operate...just sayin...

[BC_Programmer]

I still don't understand why the actual CPU Model numbers on these systems has yet made an appearance.

Find out the CPU model and verify it has the necessary instructions for the OS you are running. You would have saved a lot of time.

[Geek-9pm]

You are right. I went down the wrong path.
The model is Dell GX 520
The Mobo is Dell  ORJ290
CPU is Intel Intel Pentium D 820
Codename      SmithField
Socket 775 LGA
Technology      90 nm

Northbridge         Intel i945P/PL/G/GZ rev. A2
Southbridge         Intel 82801GB (ICH7/R) rev. A1

The info  above is not clear to me. But it is the CPU not the BIOS.
Next year I will buy a better computer.

[BC_Programmer]

The Pentium D 820 doesn't support the PrefetchW instruction.


Furthermore, while it supports the LAHF/SAHF instructions, there is a bug in the CPUID instruction of some stepping which fails to report this capability in 64-bit mode. PrefetchW is also a 64-bit requirement. It is not a requirement for 32-bit.

The "5D" error is because the NX/No Execute instruction is not enabled... Salmon Trout mentioned this already.

The prefetchW error is odd given that prefetchW has been a No-op instruction on processors that support it for some time now.

[Geek-9pm]

Thanks to BC, Salmon trout and others who helped.
I should have remembered  this.  Because I was using the 64 bit Windows 7 with no problems, I found it hard to understand how something was missing.

But I am not the only one. In fact, Microsoft has a hard time explaining all the issues that have come up with other instructions that a missing. An the year of manufacturer is not a guarantee of qualification.
Looking  back,  more problems came up when MS went from Windows 8 to  8.1  with a new list of  requirements  for the CPU and the chip set.  This was documented earlier elsewhere, but I missed it.
Windows 8.1 and new woes.
It would have been easier to provide tools that would give more information about the issues. As BC mentioned, the CPU I have also has other things wrong.  IMHO this information, if widely know, would have started a riot in the PC marketplace.   (See PCWorld link above.),

Some quad-core CPU s were made and sold years after issues were know to exist in both Intel and AMD designs. There was never a product recall.

We are talking about the 64 bit system software starting with Windows 8.1. This is not a problem with the 32 bit version of Windows8.1 now available. Just Google it and find a sites  that offer the 32 bit version of Windows8.1 free trail.

So, I have been beating  a dead horse. 

[DaveLembke]

So, I have been beating  a dead horse. 

http://gifsoup.com/view/1767326/guy-punching-computer-screen.html

sorry feeling kind of funny today. 

[patio]

Solution Here...

[DaveLembke]

Poor Dell