Member Avatar for NoCodeMonkey

After installing new ram into my Qosmio x300 the screen doesn't display anything :/

The laptop had 2 RAM sticks in it
Both of the RAM sticks were 2GB 533Mhz PC3-8500S

I took them out and added one RAM stick with 8GB 1066 MHz PC-8500S

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  • Latest Post Latest Post by NoCodeMonkey

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As observed by , the machine boots with the original module but not with the replacement, which narrows the fault to the new module or how the firmware/chipset handles it rather than a general motherboard failure. Echoing points from and , common causes are module density/organization limits, voltage or ECC differences, or a requirement for matched SODIMM pairs.

Recommended troubleshooting steps:

  • Power completely down, unplug AC and remove the main battery (if removable). Hold the power button ~10–15 seconds to discharge caps, then reseat the module firmly until the clips engage.
  • Test the replacement DIMM alone in each memory slot, and test the original DIMM alone in each slot. That isolates a bad slot from a bad stick.
  • Confirm the replacement is the correct laptop form factor (SODIMM) and voltage family (standard vs low-voltage) and that it is non‑ECC if the laptop expects that.
  • Update the laptop BIOS/firmware from the manufacturer support site; vendors occasionally add memory compatibility fixes.
  • If the module is at least sometimes detected, run a bootable memory tester (MemTest86 or similar) to validate the stick.
  • If incompatibility persists, use a matched kit (two identical SODIMMs) or exchange the part for a module on the laptop maker’s approved list.

Notes and cautions: mixing different densities, ranks or unusually high-density chips can prevent boot even when the stick looks correct on paper. Static discharge can damage modules—handle by the edges and work on a nonconductive surface. A 32‑bit OS or integrated graphics can limit usable RAM but will not normally stop the machine from POST.

Practical next choices are simple isolation and a BIOS update first; if the replacement remains invisible, return it or obtain a matched kit specified for the laptop’s platform.

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Member Avatar for caperjack

hi, the most likely probls is that it does not detect the ram ,maybe it only sees up to 4gig per slot for a total of 8 ,did you check your manual for the correct ram layout ,and its also possibe it will not take 1066 speed ram

Edited by caperjack
Member Avatar for NoCodeMonkey

It doesn't say anything about the layout, only that is supports up to 1,2,4, or 8GB at 1066MHZ

Member Avatar for rubberman

You might try 2x4GB sticks of the supported types/speeds. Some systems require both slots are filled.

Member Avatar for NoCodeMonkey

I tried just the one default RAM stick and it worked :/ so i dont think both slots have to be full :/

Member Avatar for NoCodeMonkey

and the new 8GB ram is the right type/speed

Member Avatar for caperjack

laptop and desktops that have a max of 8gig ,have to have it the forum of 2x4 gig to work .i can find a manual online of the laptop so i have to make my suggest based on my experience with laptops and ram

Edited by caperjack
Member Avatar for rubberman

Caperjack makes a good point. The use of a single 8GB SIMM would imply that the laptop supports 16GB, but you say it only supports up to 8GB. So, using 2x4GB SIMMs would seem to be a valid point.

Member Avatar for NoCodeMonkey

Makes sense, at least I learned something new, so thanks

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