I have two Inspiron 6400, both with the same T2300 Intel CPU

I've already increased RAM to 2x2gb registering 3.72gb

I've already installed Windows 7 Pro 32bit

I was hoping to install Windows 7 Pro 64bit on the second Inspiron 6400, but from the above specs, it looks just a bit too old to support 64bit

Hi,

You can install the Windows 7 Operating System on Inspiron 6400. There are few requirements to run Windows 7 on a computer,  the requirements are:

1. 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
2. 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
3. 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
4. DirectX 9 graphics device with WDDM 1.0 or higher driver

To check if the laptop can accommodate the installation of Windows 7, please run the Windows 7 upgrade advisor from the link below:

http://bit.ly/OrEtt5

The maximum hardware upgrade in the computer can be found in the link below.

http://dell.to/Q3dU0f

Please reply if you need further help.

Thanks you for your reply Sudeep S

My CPU appears not to support 64bit  (:

Here are the specs

will you please review them and see if you agree with my conclusion that it is not 64bit ready

From scanning my machine with Everest Pro:

CPUID Properties:  

  CPUID Manufacturer   GenuineIntel  

  CPUID CPU Name   Genuine Intel(R) CPU T2300 @ 1.66GHz  

  CPUID Revision   000006E8h  

  IA Brand ID   00h (Unknown)  

  Platform ID   20h / MC 20h (Socket 479)  

  Microcode Update Revision   39  

  HTT / CMP Units   0 / 2  

  Tjmax Temperature   100 �C (212 �F)  

 Instruction Set:  

  64-bit x86 Extension (AMD64, Intel64)   Not Supported  

___________________________

from Intel

Processor Number T2300

# of Cores 2

# of Threads 2

Clock Speed 1.66 GHz

L2 Cache 2 MB

Bus/Core Ratio 10

FSB Speed 667 MHz

FSB Parity No

Instruction Set 32-bit

Embedded Options Available No

Supplemental SKU No

Lithography 65 nm

Max TDP 31 W

VID Voltage Range 1.1625V - 1.30V

Thank you.

Some Inspiron 6400's will support the 64 bit. It is all down to the processor they have.

It is probably not worth dismantling the computer to install another processor for the 64 bit version. If the T7200, T7400 or T7600 is installed it will work for example.

Just to note also on this model the maximum RAM for the 32 bit is 3.24 GB usable and the maximum RAM for the 64 bit version is 3.25 GB usable. The motherboard limits the RAM on this model not the OS.

There is little point in installing the 64 bit version on this model.

I have an Inspiron 6400/E1505 with the T7200 processor and Windows 7 64-bit already installed. I have a "base system device" showing up under Other Devices in the Device Manager, which I assume is the Ricoh card reader, but I cannot find a 64-bit version of the driver for this thing. When I try to install the 32-bit Vista driver version, it says I need to run a 64-bit version of DPInst. I really don't want to reinstall Windows all over again. Is there any way I can get this device to work with 64-bit Windows 7?

Try clicking on the device in device manager and then update driver and see if it will update the driver.

Also some of the drivers will update if you run Windows Update and install all the updates for your computer.

I know the video driver updates to the latest driver once you do the Windows update after a fresh install.

Try the drivers I listed here http://en.community.dell.com/support-forums/laptop/w/laptop/4258.inspiron-6400-windows-7-64-bit.aspx