This is driving me nuts. I posted this last week, but have since done some additional investigation. I installed 4 x 1GB Mushkin DDR2 SDRAM DDR2 800 (PC2 6400) in my Intel DP35DP mobo, replacing the 2 older sticks. Purchased the new from Newegg:http://www.newegg.com/Product/Product.aspx...N82E16820146599
I also verified the selection via Newegg's configurator. Since adding the new ram XP startup has been MUCH slower, and my AV software (Trendmicro) takes 5-10 minutes to initialize. Once everything initializes, the startup of various applications is also greatly delayed (IE7, Excel, Word, etc.). I've verified the new ram 2 times via Memtest86 v2.11. It checks out 5-5-5-18 /dual channel/no errors.
I removed the new RAM this AM and replaced it with the original 2x1GB sticks. I checked them via Memtest86, and they came back good too: 6-6-6-18/dual channel/no errors. I then rebooted the machine into WinXP, and I'm back to normal.
I rebooted again and entered the BIOS. Memory settings are set to auto-detect the timing, and it was reading 6-6-6-18.
I put in the new ram again, rebooted and entered the bios. Memory settings are still set to auto-detect the timing, and it was reading 5-5-5-18. Memtest86 was also good. Booted into WinXP again, and performance is absolute CARP!
I've reviewed my Mobo manual (Intel DP35DP) here:http://download.intel.com/support/motherbo...d8746203_en.pdf
Memory requirements are below:
Unbuffered, non-registered single or double-sided DIMMs
Non-ECC DDR2 memory
DIMM Type and Timings listed below:
DDR2-800 5-5-5 or 6-6-6 only
DDR2-667 5-5-5 only
Serial Presence Detect (SPD) memory only
Memory configurations listed below:
Up to 2.0 GB utilizing 256 Mb technology
Up to 4.0 GB utilizing 512 Mb or 1 Gb technology
Up to 8.0 GB utilizing 1 Gb technology
What am I missing? Or is it possible that the Mushkin is not compatible with my mobo? Is a BIOS upgrade in order? Any other tweaks or diagnostics? I'd love to get to the bottom of this - any help/suggestions would be GREATLY appreciated. Thanks!
OS Name Microsoft Windows XP Professional
Version 5.1.2600 Service Pack 3 Build 2600
Processor x86 Family 6 Model 15 Stepping 11 GenuineIntel ~2666 Mhz (Core 2 Duo)
BIOS Version/Date Intel Corp. DPP3510J.86A.0326.2007.1206.2256, 12/6/2007