Purchased an 8GB kit for my Lenovo T500 2081 CTO. The RAM I pulled out of it was PC3-8500. The kit I bought was the Corsair CM3X8GSDKIT1066, which includes 2 4GB SODIMM's. When I put them in, the BIOS recognizes them - 8192 if both are in, 4096 if I try just one. However, Windows 7 refuses to boot with them in. I get blue screens - something about IRQ NOT EQUAL?
I have two different machines, both do the same thing.
Is the RAM just not working, or is there some basic compatibility problem that I'm missing?
I've downloaded memtest86 and run it against both the old RAM and the new RAM. The one thing that really stands out is that the old RAM is dual channel, the new RAM is single channel. The other thing that stands out is that both of the new RAM sticks will report various random errors in memtest86. Wondering now if its important that I buy dual channel...
I also just tried updating my BIOS. No dice.
- Memtest86 reports that both of the new SIM's have errors. Don't know if this is incompatibility, a bad run at the foundry, or bad luck.
- At one point, I did get the system to boot with my old 2GB and one new 4GB, got in to Windows, but as soon as I launched Visual Studio it crashed.
- Memtest86 reports that the old RAM is dual channel, and the new RAM is single channel.
My next steps are to go shopping I guess, and return the new SIMs.