how to know ram is ddr3 ,ddr4,ddr2,ddr1 | how to know ram type in laptop

CPU-Z is a free software which collects some basic informations about main hardware devices in our computer. you can download it from here.

step 1: Run setup and click on Next button.

Step 2: check i accept and click on next button.

Step 3: press the next button.

Step 4:press the next button.

step 5:Uncheck it if you don't want install ask tool bar and press Next

Step06: Press Install to finish up setup. Now Run the CPU-Z to explore more about it.

Fire up the program and in CPU tab we see some informations about the CPU you are using.. As you see i am using socket 775 and the CPU is Intel Core 2 Duo E8400 It is a 45nmCPU revision C0 and default frequency is 3.0 GHz. The v core ( CPU voltage ) is 1.225 volt. At clock speed section you see Bus Speed is 400 MHz times the Multiplier x9 = 3.6GHz. As you see it is over clocked up to 600 MHz. FSB means Front Side Buss ( the Buss which CPU communicates with memory) is 1600MHz. As the picture shows CPU uses two L1 32 KBytes and one 6MBytes L2-Cache.

On Cache tab we see more informations about the Caches. This CPU uses L1 and L2 Cache, but Some newer CPU use L3 Cache too

On Main board tab you see Motherboard's name IP35 Pro made by abit and it has got Intel P35 chipset.. The south bridge is Intel ICHR9, "R" stands for RAID . In BIOS section we see the bios type which is Phoenis version 6. Motherboard uses a PCI-Express x16 slot to communicates with Graphic card

On Memory tab you see the type of memory here is DDR2 with size of 8 Giga bytes running at Dual-Channel. Furthermore we see the Memory timings. FSB/ Memory relationship is 1:1 meaning Memory is running at base clock 400 Mhz and because of the Intel CPU runs at quad pump so rated FSB 1600 Mhz = 4 x Memory base clock

On SPD tab you find out more about the Memory timings and Profiles. As you see i have DDR2 with size of 8 Gigabytes = 4 slots x 2 Gigabytes stick. All slots are populated. The memory has four profiles. These profiles help Bios to set up the correct memory timings. It is all programmed in a little chipset called SPD As the above picture shows the Memory i am using, can run at base clock 333, 400 and 500 Mhz. At 400mhz it can run with relaxing timing 5 5 5 23 with 1.8 volt or at faster and lower timings 4 4 4 24 demands more voltage 2.0 volt.

On Graphic tab we see the very basic informations about the Graphic card, As you see i am using Ge force GTX 550 Ti made by nVidia. It has got 1024 Mbytes Video Memory and in this idle mode it is running at GPU core speed 50 Mhz and memory clock at 135 Mhz. When i run a 3D program which demands more CPU speed the core clock goes up to 950 and Memory at to 2100 MHz. I can see these informations by clicking that drop down menu and set it at default or 2D or 3D modes..