Ok so i went and picked up some new ram corsair DDR3 CMD8GX3M4A 1600c8 2048mb 1600MHZ.My board is a GA-EP45-UD3P system is an intel R core 2 quad Q9650 3GHZthe ram is 4x2g sticks i put the ram in and all it did was crash so i went back to two stick and it worked fine and so i tested 3 sticks that was ok as well. but 4 sticks no go. what would be the problem. :(

You need to run a memory diagnostic such as MemTest. You'll need to try different DIMM configurations to see if the problem is with a DIMM slot or a DIMM. Try one stick of RAM in the last slot first. If MemTest passes, start adding sticks back in one at a time until it no longer passes. Then when it fails, take out the stick that you last added and replace it with a stick that has already passed. This will tell you if you have a bad stick or a bad slot. Alternatively you can take the stick that failed and put it in a different slot, while removing all other sticks.

So you put DDR3 ram in a board that only supports DDR2?? :(

no the board supports DDR3 up to 2200mhzshafs

http://www.gigabyte.com.tw/Products/Mother...?ProductID=3012 and http://www.newegg.com/Product/Product.aspx...N82E16813128358 Memory StandardDDR2 1366+/1066/800/667 DDR2 1366+mhz... unless you wrote the wrong model number..

Since DDR3 and DDR2 are not interchangeable, and no one makes 1600MHz DDR2, his board must support DDR3.

Gigabyte website only lists DDR2 under memoryhttp://www.gigabyte.us/Products/Motherboar...-UD3P#anchor_os

DDR3 and DDR2 are not interchangeable. Whatever the OP's motherboard is, it can run DDR3.

sorry i left out the TGA-EP45t-UD3P system is an intel R core 2 quad Q9650 3GHZ

FYI http://www.tomshardware.com/forum/256822-3...byte-ep45t-ud3p Sounds like a Gigabyte thing :(

thanks for the link i went and made soem ajustments to the PC and its now working with the 8gig of ram.shafs