Memory issues, i5 H55M

[sharangad]

Hi Guys

Last week I ordered an i5 650, 8 GB (2x2x2GB) of dual channel RAM OCZ3G1333LV4GK and a Gigabyte GA-H55M-UD2H mobo. Gigabyte certifies this RAM as being compatible with this mobo.

The machine refused to boot with all four sticks, producing a power error beep at startup. I got it to boot with just two sticks in dual channel mode. However the machine isn't entirely stable failing Prim95 with rounding errors and occasionally blue screening.

I ran memtest86 and this either causes a reboot very very quickly and memtest86+ which runs without problems.

I did set the voltages and frequencies correctly in the BIOS( the sticker on the RAM states 1.65 V, however the mobo only offers 1.64 and 1.66 V with the latest beta BIOS dated April 29 2010). However the instability continues. I did manage to get it going at 800 Mhz (This is 1333 MHz DDR3) and the machine runs for hours like this ( though Prime 95 still fails).

I've requested an RMA for the RAM and have some new RAM (not from the RMA) arriving tomorrow (hopefully).

The the machine doesn't shutdown or reboot anymore. Even going into the BIOS and changing settings and selecting restart doesn't reboot the machine. It stays stuck at a black screen for like a minute before restarting. It does restart eventually

It also doesn't shutdown. Windows goes through the shutdown sequence and it reaches a black screen stage and the hard drives switch off but the fans keep going and the power light stays on. I guess it would probably shutdown after a couple of minutes.

I have noticed other people on various forums having problems with this mobo and RAM. There was also one other person who had issues with different OCZ memory and this mobo.

Does anyone have any suggestions?

Thanks.

Other people with the same hardware having issues:

http://www.ocztechnologyforum.com/f...0-GA-H55M-UD2H-Core-i3-530-and-OCZ3G1333LV4GK

http://www.tomshardware.co.uk/forum/268900-12-h55m-ud2h-problem

 

[coupe69]

I did manage to get it going at 800 Mhz (This is 1333 MHz DDR3) and the machine runs for hours like this ( though Prime 95 still fails)

Are you using CPU-Z to take the readings of you RAM?

If so 800MHz is 1600MHz DDR (Double Data Rate).

As your memory is only 1333MHz rated stuff I'd suggest you look into setting it at the correct speed ie 667MHz (1333MHz DDR) before RMA'ing it.

Below is a screenshot of my memory running at it's rated speed of 1600MHz.

If your Memory is showing 800MHz in CPU-Z then you've set it too high, and is probably why you're having issues.

 

[sharangad]

Hey dude.

Thanks for your reply.

Nope. 800 Mhz was what the BIOS showed at startup and that was the most stable config. At 1333 MHz weird things happened.

Today the new RAM arrived and the machine runs perfectly with it with no errors in anytyhing. Prime95 is completely stable.

I had to short the CMOS to fix the reboot/shutdown issue and everything is hunky dory now.