when is 3gb not 3gb

If the BIOS is reporting the same figure then this is a hardware issue, regardless.

3GB is of workstation proportions and a desktop A64 system on a ULi chipset simply does not qualify I'm afraid. You may be able to convince it to work with a BIOS update but it's doubtful IMO.
 
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allready latest bios

spec sheet from asrock
*see highlighted red*



CPU - Socket 939 for AMD Athlon 64FX / Athlon 64 and Sempron processor
- FSB 1000 MHz (2.0GT/s)
- Supports HyperTransport Technology
- Supports AMD Cool'n'Quiet Technology
Chipset - Northbridge: ULi M1695
- Southbridge: ULI M1567
Hybrid Booster - CPU Frequency Stepless control
- CPU Multiplier
- ASRock U-COP
- Boot Failure Guard (B.F.G)
Memory - DIMM slots: 4 supported
- Max. capacity: 4GB
Expansion Slot

- 1 x AGP8X/4X slot , 1.5V only
- PCI Express x16 slot
- PCI Express x1 slot
- 3 x PCI slots
* Compatible ATiX300 and X300SE series cards list
Graphics - n/a
Audio - Realtek 850 7.1channel AC'97 audio codec
LAN - Realtek RTL8201CL 10/100 Ethernet LAN PHY
- 802.3u, WOL supported
Connector - 2 x SerialATA connectors support RAID,0,1,JBOD
- 1 x SATA2 connector (based on PCI E SATA2 controller JMB360)
- 2 x ATA 133/100/66 IDE connectors (supports 4 x IDE devices)
- 1 x Floppy connector
- CPU/Chassis FAN connectors
- 20 pin ATX power connector
- 4 pin ATX 12V power connector
- Power LED connector
- CD audio in header
- Front panel audio connector
- 2 x USB 2.0 port pin headers (to support extra 4 USB2.0 ports)
Rear Panel I/O ASRock 8CH I/O
- 4 x USB2.0 ports
- 1 x RJ45 LAN port
- 1 x Serial port (COM1)
- 1 x PS2 Keyboard connector
- 1 x PS2 Mouse connectors
- 1 x Parallel port (LPT1)
- 2 x Audio ports to support 8 Ch audio ( Line In/Out, Mic In)
BIOS Feature - 2Mb AMI BIOS with ACPI, SM BIOS 3.0, PnP
Support CD - Drivers, Utilities, AntiVirus Software
- SATA driver and utility
Accessories - Quick Installation Guide, Support CD, I/O shield
- Floppy/ATA 133 cables
- 1 x SerialATA data cable
- 1 x SerialATA 1-to-1 power cable
Form Factor - ATX, 305mm x 244mm
OS - Microsoft Windows 98SE/ME/2000/XP/XP 64-bit compliant
Certifications - FCC, CE, MS WHQL
 
Start->Run>"notepad c:\boot.ini".

In Notepad find the line that looks a bit like:
ti(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn

Then change it so it looks like this:
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn /3gb

Standard disclaimers apply. Backup first. Though I probably have better lawyers anyway :p

Note: This may still not fix your problem.
 
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didnt work nathan :( but nice try

what i have noticed though is in system properties it says under the memory bit on first screen is "physical address extension" does it mean anything??
 
Ah ignore that. I've researched into this a little more and it's down to PCI Express. I'm guessing you have a 512MB graphics card right? It's down to the way memory mapping is performed. Your graphics memory gets put into the virtual memory address space.

Informative thread here: http://www.nforcershq.com/forum/ram-problems-with-a8n32-sli-deluxe-vt63746.html

In short, it is a hardware and/or BIOS problem.

cyclopopcicle said:
didnt work nathan :( but nice try

what i have noticed though is in system properties it says under the memory bit on first screen is "physical address extension" does it mean anything??
Click to expand...
Yeah the 3GB switch modifies the way Windows allocates virtual address spaces, particularly to the kernel and certain user mode programs.

The "Physical Address Extension" or PAE indication in Control Panel was just letting you know it was enabled.

Turn it off now (the /3GB switch). As it didn't work.
 
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