I was just thinking about upgrading my RAM from 512MB to 2GB, so I started searching the internet for some info. The info I got put me in one heck of a CONFUSION! FSB, DRAM Frequency, Memory Speed, Clock speed, Bus Speed, SPD blablabla - what do all these mean and what factors to keep in mind when upgrading RAM? Is it better to get 512MB(DDR-400) or 1G(DDR-333)? I did read some threads on this forum but didn't really understand much. Here's some information about my motherboard(from the manual): Motherboard Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets. Support for DDR 400, DDR 333, and DDR 266. Support for up to 2 GB of system memory. And could someone please tell me any utility that I can use to get correct information about my system? I'm currently using ASTRA32, but It's the demo version and can't generate reports.

This really isn't the correct forum to be asking, but you could have at least listed your CPU, motherboard & RAM specs so we know what you're asking about. If you have a P4 3.06GHz that runs at 533MHz FSB, the correct RAM choice would be DDR333 (aka PC2700) which runs at 166MHz. However, you *could* get DDR400 (aka PC3200) which runs at 200MHz & either leave it as-is, or adjust the memory settings in the BIOS to run it at 166MHz. If you know the make/model of your motherboard, try looking here: http://www.crucial.com

I'm sorry if I've posted my question in the wrong forum. I tried to post a report generated by ASTRA32, which was supposed to contain all the info about my system but since I'm using the demo version, the report was encrypted. That's why I asked for a utility which I could use to generate a report about my system. If you know about any such utility, please let me know. And thanks a lot for the link you posted, it gave some useful info. Motherboard: D865GSA Maximum Memory Capacity: 4096MB* Currently Installed Memory: 512MB Available Memory Slots: 3* Total Memory Slots: 4* Dual Channel Support: Yes CPU Manufacturer: GenuineIntel CPU Family: Intel(R) Pentium(R) 4 CPU 3.06GHz Model 4, Stepping 9 CPU Speed: 3057 MHz I got the above information by scanning my system at crucial.com *The scan shows 4096, but it can't be more than 2048. *shows 3 available memory slots, but I see only one available on my motherboard. *shows 4 memory slots in total whereas there are 2 on the board. Why did the scan result in wrong info? CPU Got this info using 'Advanced System Information Tool' L2 Cache: 1MB System Bus Clock: 531.8MHz FSB Clock: 133MHz QDR Multiplier: 23.0 From BIOS System Bus Speed: 533MHz System Memory Speed: 333MHz In BIOS there's also an option of DRAM Frequency which is set to Auto. Now what's the difference among: System Bus Clock, FSB Clock, System Bus Speed? And what's the difference between System Memory Speed and DRAM Frequency? And does a motherboard also have bus speed? Too many questions, but I know you can answer them - you guys are gurus! :)

Here's your motherboard? http://www.intel.com/products/mothe... Crucial page for the D864GSA http://www.crucial.com/store/listpa... Like jam said, unbuffered, non-ECC, PC2700 is the correct choice. Skip

Thanks for tryin to help guys. I guess 'Hardware' is the forum where I should be posting this. So you can delete this thread. Thanks!