[QUOTE="Peter"] Hello; From a person who dosnt know. Where in the manual does it explain whether the motherboard is 32 bit or 64 bit. A friend gave me a unused motherboard, but i just dont know . Thanks Peter[/QUOTE] The attribute is mainly with respect to the processor. You might argue that the ability to address more than 4GB of system memory, is also important. And that can be a function of the chipset. For example, there is one old Intel chipset, which can accept 4x2GB sticks of RAM, and yet when you run the system, it will only report 4GB of memory as present. And that's because the system bus on the Northbridge of the chipset, lacks 36 bits for the address. It only has a 32 bit address bus. In your case, with the H55, this is irrelevant (memory controller is inside the processor, no skinny busses). You need to look up the processor you've purchased, to see what it is. I have a suspicion most of the processors that will fit in the motherboard, are 64 bit capable. We start with the CPU support table from the Gigabyte site. [URL]http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3601[/URL] First, I'll check a cheesy processor, to see what it offers. approx. Intel Pentium G6950 2.80GHz 3MB Clarkdale 32nm C2 73W 133 F1 We go to ark.intel.com to look up products. [URL]http://ark.intel.com/products/43230/Intel-Pentium-Processor-G6950-(3M-Cache-2_80-GHz)[/URL] "Instruction Set 64-bit" Try another. Core i3-530. [URL]http://ark.intel.com/products/46472/Intel-Core-i3-530-Processor-(4M-Cache-2_93-GHz)[/URL] "Instruction Set 64-bit" It's looking pretty safe. They're all going to be 64 bit capable. You can use a 64 bit OS or a 32 bit OS with them. ******* You may notice graphics connectors on the back of the motherboard. [URL]http://images17.newegg.com/is/image/newegg/13-128-457-Z02?$S640W$[/URL] Those graphics connectors only work, if there is a GPU (video chip) inside the CPU package. The block diagram shows the detail. I think it's that "FDI" path on the side. It makes a video connection from the video chip inside the processor package, to the output driver in the PCH. [URL]http://ark.intel.com/inc/images/diagrams/diagram-18.gif[/URL] On the G6950, it lists "Integrated Graphics Yes" so you wouldn't need a graphics card to build a minimal system. If instead, we look at a Core i5 750 from the Gigabyte list... [URL]http://ark.intel.com/products/42915/Intel-Core-i5-750-Processor-(8M-Cache-2_66-GHz)[/URL] "Integrated Graphics No" That means, if you buy the 750 (a very nice processor), it lacks a video chip inside, and so you end up buying a cheap video card to provide video (costs an extra maybe). With the 750 installed, the DVI-D and VGA connectors on the back of the motherboard, won't work. That's about all you have to watch for. You could also check for VT-X as an option, but the Windows 7 "WinXP mode" no longer absolutely needs VT-X to work (Microsoft changed the requirement after launch). And right off hand, I don't know if any other cheap/free virtual environments need it or not. If I look on Newegg, I can get an idea of which processors are still being manufactured by Intel for socket 1156. [URL]http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007671%20600005864&IsNodeId=1&name=LGA%201156[/URL] Of the lot, this one was the best rated - i3 540. I expect that's because it is only . The quad for 9 is nuts. You might have to check elsewhere (Ebay?), to find a low end quad for the socket. [URL]http://www.newegg.com/Product/Product.aspx?Item=N82E16819115221[/URL] Core Clarkdale Multi-Core Dual-Core Name Core i3-540 Freq 3.06GHz L3 Cache 4MB Integrated Graphics Intel HD Graphics Virtualization Technology Support Yes That's virtually the same as the processor I'm using, only I paid about double that for mine (socket 775). Another thing - open the box holding the motherboard, pull the plastic cap covering the socket, and visually inspect the contacts. If any of the contacts are bent or distorted, or the pins are fouled with dirt, don't bother buying a processor. If the motherboard is damaged, it would be a more risky project to fork out the bucks for a processor. Damaged socket contacts also invalidate the warranty on the motherboard (if it was damaged in manufacturing, return it to the retailer immediately). Have fun, Paul