Member Avatar for archie.herbias

I have a lenovo g400 laptop and i want some upgrades. I have intel i3 processor .my question is, can i update this to intel i5 or i7 ? .i have 2gb ram and i want to upgrade to 4gb+2gb? .is this okay ? :)

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Brief, practical guidance for (and anyone following): swapping a laptop CPU is not guaranteed even when the same brand of chip exists. Whether an i3 can be replaced by an i5 or i7 depends on the motherboard/socket, BIOS support and the cooling/power design. For real, affordable gains, memory and storage upgrades usually give the biggest visible improvement with the least risk.

Recommended diagnostic steps (concrete, low-risk):

  • Confirm the exact retail/service model (the sticker on the case or the hardware maintenance manual on Lenovo support).
  • Use a tool like CPU-Z to read the CPU package/socket and the chipset, or consult the laptop’s Hardware Maintenance Manual (HMM) / FRU list to see if the CPU is socketed or soldered.
  • If the CPU is socketed, compare compatible mobile CPUs for the same socket and chipset and check Lenovo BIOS release notes for supported CPU microcode.
  • Before any swap, update BIOS/EC to the latest Lenovo release and ensure the cooling system can handle a higher-TDP CPU (clean fans, consider fresh thermal paste).

Memory upgrade notes and best practice:

  • Adding a 4GB stick to the existing 2GB will work in most cases, but mixed sizes often prevent full dual-channel operation. A matched pair (for example 2x4GB) gives the best sustained memory bandwidth and fewer compatibility worries.
  • Match SODIMM type/speed/voltage when possible (inspect the existing module label or the HMM for exact specs). Standard safe precautions apply: power off, remove battery/AC, discharge static, open the access panel and seat modules in the clips.

Other practical advice:

  • An SSD and a matched RAM upgrade usually deliver a far better day-to-day experience than a risky CPU swap. If significant CPU uplift is essential, buying a higher-spec used laptop or a board-swap from identical-model parts is often more cost-effective than hunting for a compatible mobile CPU.

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Member Avatar for rubberman

A lot depends upon whether this has the HM76 or HM86 chipset. The HM86 can support i3, i5, and i7 chips, but the socket may be a problem. As for memory, it should be able to support 4-16GB of RAM, depending upon the simms that you install. Go into the BIOS and list out the hardware/chipset specs here and we can probably tell you better how much you can enhance this system.

Member Avatar for archie.herbias

This is what i got in my bios:

Product Name: Lenovo G400
Bios Version: 78CN19WW(V1.07)
EC Version: 78EC19WW(V1.07)
Lenovo SN: Cb25043813
Board Number: 3203769204706
CPU: Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz
System Memory: 2048 MB
Hard Disk: WDC WD5000LPVT-24G33T1
CD/DVD Rom: MATSHITA DVD-RAM UJ8D1

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