Why would Windows 32-bit work fine but 64-bit give BSOD?

[ninvin]

I been working on a friends Dell 1546 64bit AMD laptop.
It crashes on Fresh installs of 64bit but works fine on 32bit what would cause this?
I have updated his AMD chipset drivers,updated his bios,updated DVD drive firmware. I ran memtest and prime95 for many many hours and they both have no errors. I scanned his HD thats also fine.I ran chkdsk /r/f,scannow etc.
I messed with different setting in the bios but still no luck.
I took it apart applied new thermal paste reinserted all the drives added a new cmos battery,cleaned out the dust etc.
On 64bit it Crashed mostly on Facebook Flash games and youtube.
Bluescreen errors where mostly hal.dll+12903 and ntoskrnl.exe.
0x124 - WHEA_UNCORRECTABLE_ERROR

I just want to know what possibles would cause 64bit to crash but not 32bit!

Thank you

 

[Leeky]

Whats the service tag of the Dell laptop?

Its probably hardware, e.g. 64 bit is too much for it, but I'd rather see the specifications of it before confirming.

 

[ninvin]

The service tag is 3KG3ZJ1.
I have the same feeling that 64 bit is too much for it But 64bit came pre- installed on it.
I could not run one video in 64bit for over 15 min with out a crash.
On 32bit I been running 2 videos and a flash game for over two hours.

 

[Leeky]

It is a 64 bit CPU: http://www.cpu-world.com/CPUs/K8/AMD-Turion 64 X2 Mobile technology RM-75 - TMRM75DAM22GG.html

There should be no reason why it wouldn't run 64 bit.

Are you using the latest drivers from www.dell.com ?

 

[ninvin21]

yep it has a 64 bit CPU.Yes I also downloaded all the drivers from dell I been messing with it for over a week running tests and such.If it works on 32 and not 64 I think it has to be a driver issue Right? I have also tried different browsers it BSOD's on all of them. I disabled hardware acceleration.I tried default settings in BIOS along with other settings. I also played with some of AMD's settings. It would have to be a driver or wrong settings it makes no sense to me.It looks like I'm just going to keep it in 32bit mode. Thanks for the help I really do appreciate it.

 

[Leeky]

I think the next step really is to see some minidumps.

They're in C:\windows\minidump

Attached the last 4-5 to your reply and I'm sure someone will view them soon, and be able to hopefully zero in on the issue.