Hi all I'm new to this forum and I have a problem with upgrading my RAM, currently I have 512MB of PC2700 RAM (2x256MB) and I bought 1GB of PC3200 kingston RAM (2x512MB), now when I place one stick in it works fine but when the two are in together I get a BIOSBLOCK thing at start up, if anyone has had this problem or knows how to fix it please can you tell me? My motherboard is the EPoX 4sgm8i if that helps.

Just run the stick of PC3200 (DDR400) by itself. The added 256MB of PC2700 (DDR333) will cause BOTH sticks of RAM to run as PC2700. Better to have 1GB at 200MHz (DDR400) than 1.25GB at 166MHz (DDR333) This space for rent

No the problem is, as I only have two slots, I have removed both PC2700 sticks and placed in two PC3200, my computer seems to work with only one stick (I tried both by themselves they both work) but not two of them at once.

Sorry, I misread your orignal post. I just checked the specs on your board & it says the following: "System Memory: Two 184-pin DDR SDRAM DIMM sockets Support single-sided or double-sided 2.5v DDR-266/333/400 DIMMs in 64/128/256/512Mb technologies Support up to 2 GB system memory" http://www.epox.com.tw/eng/products_content.php?ps=310 The only thing I can suggest is testing your new RAM individually with memtest86. Another possibility is a BIOS update. http://www.memtest86.com/#download0 This space for rent

I used that memtest and all passed, by accident I said it was BIOSBLOCK but infact it is BOOTBLOCK, heres the exact message, Award BOOTBLOCK BIOS v1.0 Copyright (c) 2000, Award Software, Inc BIOS ROM CHECKSUM ERROR Detecting floppy drive A media... Insert system disk and press enter. I didn't get no floppy disk when I bought the PC only a recovery CD-ROM, and when i put any floppy in it says AWDFLASH.exe NOT FOUND... sorry for the mistake.

It appears that somehow your BIOS got corrupted. You'll probably have to reflash. Download the AWDFLASH file & the latest BIOS file & copy them to a bootable floppy, then boot of it & perform the flash. Link to Flash tool: http://www.epox.com.tw/eng/utility_software.php Link to BIOS file: http://www.epox.com.tw/eng/support.php?ps=310&type=1 This space for rent

I have just done it, with both sticks in and it said: BIOS IMAGE FILE CHECKSUM ERROR !! YOU CANNOT UNDATE THIS IMAGE FILE !! now, I tryed it with only the one stick in and it flashed sucessfully, but my WinXP messed up and so I had to format the computer and now I can't enter A: drive or see a drive in My Computer...