Win 7 does not start after new RAM

January 30, 2011 at 18:47:18
Specs: Windows 7, AMD Athlon II x3 & 8GB DDR3@1333Mhz
I've just now added 6GB of DDR3 RAM at 1333 Mhz to my original 2GB of the same kind. After starting the computer for the first time with the new modules, the computer ran quickly, but BSOD'd. After this happened a few more times, the computer no longer boots up, and instead always goes into startup repair, unless commanded to boot, in which case it fails and returns to a screen asking whether to start normally or repair again. Startup repair does absolutely nothing. I am running 64-bit Win 7.

See More: Win 7 does not start after new RAM

Report •

January 30, 2011 at 19:48:30
Obviously the new RAM is the problem. Did you confirm that the BIOS memory settings are correct, especially the voltage? Did you test the RAM for errors?

Report •

January 31, 2011 at 01:17:22
Somehow I was able to run a memory test during startup, and it came up with a hardware error as suspected, but no more detailed information than that. Do remember that the computer does not start, and I cannot download or run anything on it. I checked the BIOS and it's set for this type of RAM.

Report •

January 31, 2011 at 01:24:03
Take out the RAM one stick at a time to see which one is causing the problem. Ask the supplier to replace it. But you may need to take all the new memory out and do a repair install now that the boot settings have got messed up. Then try it one stick at a time to determine the culprit.

Report •

Related Solutions

January 31, 2011 at 01:31:27
Also, this came up from startup repair:
Problem Signature:
Problem Event Name: Startup Repair Offline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: 21200942
Problem Signature 05: AutoFailover
Problem Signature 06: 2
Problem Signature 07: 0x50
OS Version: 6.1.7600.
Locale ID: 1033

Report •

January 31, 2011 at 04:26:05
Screwed up in safemode a bit and got back to running with the one stick.

Report •

January 31, 2011 at 06:21:25
"Do remember that the computer does not start, and I cannot download or run anything on it"

What do you mean "it does not start"? It's completely dead? No lights, no fans, nothing? Or does it just not boot into Windows? Memtest86 is run directly from a bootable CD. It has nothing to do with Windows, Windows doesn't even have to be installed. In fact, you don't even need a hard drive to test the RAM.

You didn't answer about the RAM settings. Does ALL your RAM run at the same voltage? DDR3 RAM that conforms to the JEDEC standard runs at 1.50v, but there is plenty of DDR3 RAM that does NOT confrom to the standard & runs at 1.60v or 1.65v. If you mix 1.65v with 1.50v & don't manually configure the voltage setting in the BIOS, the voltage will automatically default to 1.50v making the 1.65v RAM unstable.

Test the RAM!

Report •

January 31, 2011 at 07:56:30
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:

Some ram manufacturer's modules do not strictly adhere to the JEDEC standards that most mboards bioses use to determine ram settings.
In that case, the ram settings in the bios Setup that the bios has automatically chosen may not be correct.
Check the ram settings in your bios - the ram voltage, and the ram timing numbers - those should be the same as for the specs for the modules themselves. Often the ram voltage and timing numbers are printed on the label on the modules.

If the voltage setting or timings settings in the bios are different from the specs for the ram, change them in the bios. The timing numbers must be as close as you can get to the same, or slower timings (higher numbers = slower) - you won't notice the difference the slower settings make.

If you have a mix of different modules
- don't mix ram that different voltages are specified for - the bios will force the ram to use the lowest voltage, if "by spd" or similar is used (default settings) - ram that a higher voltage is specified for is more likely to not work properly in that situation.
- the bios settings must be those for the slowest timing settings of all the modules, or slower (higher numbers = slower).

If you DO have a mix of modules that require different voltages, you may or may not be able to tweak the ram voltage the bios is using to a higher value such that all the ram will work fine, but you can't exceed the fractional + or - voltage tolerances for the modules.
The fractional + or - voltage tolerances for the modules can be hard to determine - e.g. Kingston has that info readily available for most of their modules, but many other ram manufacturers do not.

Report •

Ask Question