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fz11z ram upgrade speed throttled help pls!


New Member
Feb 11, 2012
1 (0.00/day)
Hi to geokholer,
or anyone can answer if knows a solution to this.
I just read a older post from few years ago as I'm interested in upgrading my vaio laptop fz11z. got cpu t7300, 800mhz FSB, chipset intel pm965, vista 32.
I did upgrade my Ram memory from pc2-5300 2x1gb 667mhz to corsair pc2-6400 2x2gb 800mhz. Surprisingly, despite upgrading my chipset drivers to the latest from intel support website, my system still runs the new memory at only 667mhz instead of the new and the much expected 800mhz. After a lot of internet research, looks like Intel is throttling the frequency of my ram to 667mhz to prevent overheating, and I think this can be changed somewhere in Bios, but I cannot acces any parameters or settings under bios memory panel, also cannot find any upgrade for my bios and I don't know if this update exists or it will solve the ram frequency issue.
Any solution to that? You (geokholer) claimed in your post that the system should recognize de memory. Cpu-z test sees that the true memory frequency is 800mhz (aka 400mhz per channel) but is also showing that is running only at 667mhz (330 per channel).
Should I try another brands of similar memory (I guess will be same result)?
And another question, if I switch to Windows 7 64 bit version (in order to use all the new 4gb RAM), will the same drivers from Sony support work (those are designed for vista x32)?
Also you said that you are a guru of intel pm965 chipsets and stated that the new memory upgrade should be cas latency 4 (I couldn't find anywhere such thing, the best is cas 5 for sodimm 200pin pc2-6400 for laptops) and memory should be low density 128x8 not 256x64 (despite all the memories on the market -2gb per unit- being actually 256x64! and having 128x8algorithms included so I am a bit confused about what you tried to say, sorry!).
Thank you.
Adrian, London.
Nov 15, 2005
880 (0.20/day)
Processor 2500K @ 4.5GHz 1.28V
Motherboard ASUS P8P67 Deluxe
Cooling Corsair A70
Memory 8GB (2x4GB) Corsair Vengeance 1600 9-9-9-24 1T
Video Card(s) eVGA GTX 470
Storage Crucial m4 128GB + Seagate RAID 1 (1TB x 2)
Display(s) Dell 22" 1680x1050 nothing special
Case Antec 300
Audio Device(s) Onboard
Power Supply PC Power & Cooling 750W
Software Windows 7 64bit Pro
Well it doesn't look like you're going to get a response from geokohler since his last and only post was 2 and a half years ago. As for getting your RAM to run at rated speeds, you can always try to reset your BIOS and see if it then recognises it correctly. Start with the laptop turned off, unplugged and with the battery out. Then check under the panels on the bottom of the laptop to see if you can find the battery on the motherboard (the small circle button cell battery). If you can get access to it and remove it, take it out for a few minutes then put it back in and run everything like normal. Hopefully after being reset the BIOS should recognise the correct speed of your RAM. As for the drivers, it's always a scavenger hunt for those on a laptop. Should be easier looking for Win 7 drivers than older XP drivers.