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  1.    06 Aug 2015 #1
    Join Date : Aug 2015
    Posts : 17
    win 7

    W10 CPU Requirements not fully stated


    Microsoft says the CPU requirement for W10 is:

    • Processor: 1 gigahertz (GHz) or faster


    Well, it seems that they are using the same CPU requirements for W10 that they have for W8.1. I attempted to install W10 RTM on a machine I use for testing and it immediately complained that it was not NX capable. In fact, if you look at the details when the error comes up it references W8.1. So it appears that you are basically going to need a 64 bit capable processor and I don't think that any of them are anywhere near 1Ghz. I guess that Pentium 4's and similar are basically dead unless you either remain on W7 or use Linux instead.
      My ComputerSystem Spec
  2.    06 Aug 2015 #2
    Join Date : Dec 2013
    Portsmouth Hampshire
    Posts : 1,782
    Windows 10 x86 14383 Insider Pro and Core 10240

    No. Pentium 4 works well with 10 on my system - see system specs - x86 Prescott from 2005 3.2 GHz. Let's run Win10 on really really old hardware - Page 3 - Windows 10 Forums

    Windows 10 on old hardware (2007) - WinBeta - reboot.pro

    Windows 10 Forums - Search Results

    It will just about run on a 32-bit Celeron M 1.50 GHz, but I have not quite got the rest of the hardware to comply yet with the Windows 10 setup program which has some restrictions and probably bugs with CPU checking etc., as others have reported. Next to try is applying Install.wim directly to the volume I want it installed on.
      My ComputersSystem Spec
  3.    06 Aug 2015 #3
    Join Date : Sep 2014
    Nashville, TN
    Posts : 3,142
    Windows 10 Pro

    There are two requirements for the CPU besides the speed. The first is NX Bit support, the second is CMPXCHG16 support. Most processors since about 2005 support both of these (with the exception that some AMD CPU's don't have the CMPXCHG16 support).

    NX support, however, is often turned off by default in many BIOS's, so you may need to go into your bios and flip that on.

    There does seem to be a bug where NX support is wrongly shown as lacking even when it's not on certain chipsets or cpu's, I don't know which ones, but there has been a lot of complaints about it.

    Also, there is an Intel feature that automatically scales down the CPU when idle called Intel SpeedStep, and if this is enabled on some CPU's (I've most heard this on Core i7 4xxx CPU's) when installing it may report that your CPU isn't fast enough. You may need to disable this when installing, and re-enable after you've installed.
      My ComputerSystem Spec
  4.    06 Aug 2015 #4
    Join Date : Aug 2015
    Posts : 17
    win 7
    Thread Starter

    My test machine is a Dell Dimension 4700 w/ a Pentium 4 550 Prescott @3.4ghz installed. It has 4GB of memory installed even though 3.2GB will only be seen by a 32 bit Windows OS.

    Originally I tried to install via a 32 bit W10 RTM iso loaded on a DVD. Today I noticed the get W10 icon in my status bar and tried to run it and I got a CPU incompatible message (attached).

    I looked at your threads and it seems that you are on a preview release. I suspect this may be allowing W10 to install on incompatible hardware.

    I guess I'll keep the machine running on W7 where there are lots of friends of mine still running older hardware that I support for free in retirement. I'm not interested with forcing their machines to upgrade, particularly where drivers will be unsupported in this configuration and can potentially be problematic now or down the road. I just ordered an old cheap i5 on eBay to perform future W10 testing with.

    One interesting thing though... I searched this forum with the term NX and came back blank. One of your noted threads definitely uses the term in the narrative.

    Thanks, Tim
    W10 CPU Requirements not fully stated Attached Files
    Last edited by tgm; 17 Aug 2015 at 11:33.
      My ComputerSystem Spec
  5.    06 Aug 2015 #5
    Join Date : Sep 2014
    Nashville, TN
    Posts : 3,142
    Windows 10 Pro

    @tgm - As you can see from this page

    ARK | Intel 4 Processor 550 supporting HT Technology (1M Cache, 3.40 GHz, 800 MHz FSB)

    The P4 550 doesn't support NX.
      My ComputerSystem Spec
  6.    06 Aug 2015 #6
    Join Date : Aug 2015
    Posts : 17
    win 7
    Thread Starter

    Quote Originally Posted by Mystere View Post
    @tgm - As you can see from this page

    ARK | Intel 4 Processor 550 supporting HT Technology (1M Cache, 3.40 GHz, 800 MHz FSB)

    The P4 550 doesn't support NX.
    I knew that the CPU didn't support NX. If you look back to the beginning you will see that Mico$oft does NOT say in their System Requirements that the CPU have anything more than being capable of 1Ghz (or more). Clearly my CPU exceeds that spec. If M$ was open and honest about what the specs really are, the confusion would cease.

    Instead they are now pumping out Go Win 10 (GWX.exe) to every W7-SP1 machine with Windows Update with literally millions of them unable to properly install it. Even in my very small circle of retirees the issue is popping up and I'm getting phone calls. What I really believe is that they are hyping the hell out of W10 with the hope that these people with older machines will buy new hardware which translates to $$$ for M$. There has been collusion between M$ and the hardware vendors for years; nothing seems to have changed. But now they have eliminated support for Easy Transfer too, you have to wonder how they expected people to migrate to these new machines?
      My ComputerSystem Spec
  7.    06 Aug 2015 #7
    Join Date : May 2015
    Posts : 1,624
    Win 10 X64 Pro 15063

    They say a bit more than that, if you look more closely:

    Windows 10 Specifications - Microsoft

    "To install a 64-bit OS on a 64-bit PC, your processor needs to support CMPXCHG16b, PrefetchW, and LAHF/SAHF." Nothing about NX (= DEP), though. The implication is that CMPXCHG16b etc. is not required for the 32 bit version; I wonder whether that is true.

    I suppose that it would have been nice to have Windows Update download a utility that checked hardware before offering up GWX. It might have saved some disappointment.

    It wouldn't have occurred to me that eliminating Windows Easy Transfer was a problem. I haven't used it in years. Don't need it to transfer files, don't trust it to transfer settings. If it could have transferred applications - that would have been interesting.
      My ComputerSystem Spec
  8.    06 Aug 2015 #8
    Join Date : Dec 2013
    Portsmouth Hampshire
    Posts : 1,782
    Windows 10 x86 14383 Insider Pro and Core 10240

    Coreinfo.exe From TechNet Windows Sysinternals
    Coreinfo

    Gives the following for INTEL Pentium 4 3200 Prescott 540 LGA775 (Supported features in bold)

    Code:
    Intel(R) Pentium(R) 4 CPU 3.20GHz
    x86 Family 15 Model 4 Stepping 1, GenuineIntel
    Microcode signature: 00000017
    HTT       	*	Hyperthreading enabled
    HYPERVISOR	-	Hypervisor is present
    VMX       	-	Supports Intel hardware-assisted virtualization
    SVM       	-	Supports AMD hardware-assisted virtualization
    X64       	-	Supports 64-bit mode
    
    SMX       	-	Supports Intel trusted execution
    SKINIT    	-	Supports AMD SKINIT
    
    NX        	*	Supports no-execute page protection
    SMEP      	-	Supports Supervisor Mode Execution Prevention
    SMAP      	-	Supports Supervisor Mode Access Prevention
    PAGE1GB   	-	Supports 1 GB large pages
    PAE       	*	Supports > 32-bit physical addresses
    PAT       	*	Supports Page Attribute Table
    PSE       	*	Supports 4 MB pages
    PSE36     	*	Supports > 32-bit address 4 MB pages
    PGE       	*	Supports global bit in page tables
    SS        	*	Supports bus snooping for cache operations
    VME       	*	Supports Virtual-8086 mode
    RDWRFSGSBASE	-	Supports direct GS/FS base access
    
    FPU       	*	Implements i387 floating point instructions
    MMX       	*	Supports MMX instruction set
    MMXEXT    	-	Implements AMD MMX extensions
    3DNOW     	-	Supports 3DNow! instructions
    3DNOWEXT  	-	Supports 3DNow! extension instructions
    SSE       	*	Supports Streaming SIMD Extensions
    SSE2      	*	Supports Streaming SIMD Extensions 2
    SSE3      	*	Supports Streaming SIMD Extensions 3
    SSSE3     	-	Supports Supplemental SIMD Extensions 3
    SSE4a     	-	Supports Streaming SIMDR Extensions 4a
    SSE4.1    	-	Supports Streaming SIMD Extensions 4.1
    SSE4.2    	-	Supports Streaming SIMD Extensions 4.2
    
    AES       	-	Supports AES extensions
    AVX       	-	Supports AVX intruction extensions
    FMA       	-	Supports FMA extensions using YMM state
    MSR       	*	Implements RDMSR/WRMSR instructions
    MTRR      	*	Supports Memory Type Range Registers
    XSAVE     	-	Supports XSAVE/XRSTOR instructions
    OSXSAVE   	-	Supports XSETBV/XGETBV instructions
    RDRAND    	-	Supports RDRAND instruction
    RDSEED    	-	Supports RDSEED instruction
    
    CMOV      	*	Supports CMOVcc instruction
    CLFSH     	*	Supports CLFLUSH instruction
    CX8       	*	Supports compare and exchange 8-byte instructions
    CX16      	-	Supports CMPXCHG16B instruction
    BMI1      	-	Supports bit manipulation extensions 1
    BMI2      	-	Supports bit manipulation extensions 2
    ADX       	-	Supports ADCX/ADOX instructions
    DCA       	-	Supports prefetch from memory-mapped device
    F16C      	-	Supports half-precision instruction
    FXSR      	*	Supports FXSAVE/FXSTOR instructions
    FFXSR     	-	Supports optimized FXSAVE/FSRSTOR instruction
    MONITOR   	*	Supports MONITOR and MWAIT instructions
    MOVBE     	-	Supports MOVBE instruction
    ERMSB     	-	Supports Enhanced REP MOVSB/STOSB
    PCLMULDQ  	-	Supports PCLMULDQ instruction
    POPCNT    	-	Supports POPCNT instruction
    LZCNT     	-	Supports LZCNT instruction
    SEP       	*	Supports fast system call instructions
    LAHF-SAHF 	-	Supports LAHF/SAHF instructions in 64-bit mode
    HLE       	-	Supports Hardware Lock Elision instructions
    RTM       	-	Supports Restricted Transactional Memory instructions
    
    DE        	*	Supports I/O breakpoints including CR4.DE
    DTES64    	*	Can write history of 64-bit branch addresses
    DS        	*	Implements memory-resident debug buffer
    DS-CPL    	*	Supports Debug Store feature with CPL
    PCID      	-	Supports PCIDs and settable CR4.PCIDE
    INVPCID   	-	Supports INVPCID instruction
    PDCM      	-	Supports Performance Capabilities MSR
    RDTSCP    	-	Supports RDTSCP instruction
    TSC       	*	Supports RDTSC instruction
    TSC-DEADLINE	-	Local APIC supports one-shot deadline timer
    TSC-INVARIANT	-	TSC runs at constant rate
    xTPR      	*	Supports disabling task priority messages
    
    EIST      	-	Supports Enhanced Intel Speedstep
    ACPI      	*	Implements MSR for power management
    TM        	*	Implements thermal monitor circuitry
    TM2       	-	Implements Thermal Monitor 2 control
    APIC      	*	Implements software-accessible local APIC
    x2APIC    	-	Supports x2APIC
    
    CNXT-ID   	*	L1 data cache mode adaptive or BIOS
    
    MCE       	*	Supports Machine Check, INT18 and CR4.MCE
    MCA       	*	Implements Machine Check Architecture
    PBE       	*	Supports use of FERR#/PBE# pin
    
    PSN       	-	Implements 96-bit processor serial number
    
    PREFETCHW 	-	Supports PREFETCHW instruction
    
    Maximum implemented CPUID leaves: 00000005 (Basic), 80000008 (Extended).
    
    Logical to Physical Processor Map:
    **  Physical Processor 0 (Hyperthreaded)
    
    Logical Processor to Socket Map:
    **  Socket 0
    
    Logical Processor to NUMA Node Map:
    **  NUMA Node 0
    
    No NUMA nodes.
    
    Logical Processor to Cache Map:
    **  Data Cache          0, Level 1,   16 KB, Assoc   8, LineSize  64
    **  Unified Cache       0, Level 2,    1 MB, Assoc   8, LineSize 128
    
    Logical Processor to Group Map:
    **  Group 0
    This processor has NX, PAE, and SSE2, so can run x86 Windows 8.x and 10.
    PAE is a prerequisite for NX, but no Windows x86 OS implements the use of 4GB or greater physical memory.
    This Pentium 4 cannot run a 64-bit OS, so CX16, LAHF/SAHF, etc., are irrelevant.

    Windows 10 requires no lesser requirements than Windows 8.1 equivalent versions - even in prelease versions:
    System requirements - Microsoft Windows


    System requirements : Windows 8.1

    If you want to run Windows 8.1 on your PC, here's what it takes:

    • Processor: 1 gigahertz (GHz) or faster with support for PAE, NX, and SSE2 (more info)

    •RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)

    •Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)

    •Graphics card: Microsoft DirectX 9 graphics device with WDDM driver
      My ComputersSystem Spec
  9.    17 Aug 2015 #9
    Join Date : Aug 2015
    Posts : 17
    win 7
    Thread Starter

    Well, this is interesting. The 32 bit version of W10 upgrade install (RTM) complains about the CPU and there is 32 bit W7 already installed on the machine. I'll swap out the drive and see if I can install either 32 or 64 bit versions of RTM will install if no OS is present.

    I've got another i5 machine that I'm testing W10 with (x64) and I got to say that there are lots of bugs that M$ needs to address. Lots of configuration click spots do nothing and you need to revert to the old Control Panel to actually get things done.
      My ComputerSystem Spec
  10.    17 Aug 2015 #10
    Join Date : May 2015
    Posts : 1,624
    Win 10 X64 Pro 15063

    Quote Originally Posted by tgm View Post
    Well, this is interesting. The 32 bit version of W10 upgrade install (RTM) complains about the CPU and there is 32 bit W7 already installed on the machine. I'll swap out the drive and see if I can install either 32 or 64 bit versions of RTM will install if no OS is present.

    I've got another i5 machine that I'm testing W10 with (x64) and I got to say that there are lots of bugs that M$ needs to address. Lots of configuration click spots do nothing and you need to revert to the old Control Panel to actually get things done.
    The P4 550 lacks NX (also known as Execute Disable Bit). It also lacks 64 bit instructions. Good luck with the 64 bit installation.

    The division of configuration settings between Settings and the old Control Panel is one of the things that MS really ought to fix soon. Actual bugs? None that I've seen, although there was a fair amount of fiddling with drivers on a 2008 laptop with an AMD CPU and an nVidia motherboard chipset.
      My ComputerSystem Spec

 
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