Repeated, different BSOD after installing new ram. OC issue? (must be)

stevenjcampbell

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Hi, and hope that someone can explain this for me.

I have an old motherboard and cpu.
The motherboard is a gigabyte GA-G41M-ES2L
775, with a FSB up to 1333mhz

Radeon HD 6570 in there, not overclocked.
Also had 2 gig of DDR2 800mhz ram. (1x2 sticks of 1 gig ram)
Intel core2duo E4400 @ 2ghz

I had used the bios to up the frequency of the cpu to 250 from 200 (this made the clock run from 2ghz to 2.5 ghz

when i installed 2x2gb ram to go to 4 gigs and rebooted, i had a very slow boot, then a bsod when i loaded a 720p mp4 file.

Used cpu-z and got the timing that the memory read (6-6-6-18) and went into the bios, changed that and got a much faster boot.

Then another BSOD.
These were all different codes, at different points, very arbitraty

Restarted, another BSOD.
All different.

-0X00000070
-0x0000006D
and others.

So, frustrated i went back in and changed the last intiger that cpu-z told me (command rate) to 2T, then started the pc again and ran the prime95 program, got another freeze and not a dump screen, and just rebooted. this was frustrating.

I went in and reset the defaults to the optimal settings, then ran memtest86 for the entirety of the program (no errors on the ram) and rebooted with a stock cpu and things are again rock solid.

What am I doing wrong. I did not change voltages, just the frequency of the cpu, and then those timing numbers for the ram.

The ram was running at 500mhz as opposed to 800mhz when i upped the frequency of the cpu, I read this is what happens, but the ram can usually be rated to at least 1066 so it should be fine.

any ideas?
 
Solution
the problem is you bumped the cpu frequency, which also kicks up the ram speed. the ram needs to be slowed down... not sure what the multiplier is on the ram for your mb, but chances are your ram is running much too fast. slow it down, that should fix the problem.
the problem is you bumped the cpu frequency, which also kicks up the ram speed. the ram needs to be slowed down... not sure what the multiplier is on the ram for your mb, but chances are your ram is running much too fast. slow it down, that should fix the problem.
 
Solution

stevenjcampbell

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in the BIOS there were three settings:

- one brought the ram to around 6xx mhz
- one to around 833mhz (give/take)
- one to exactly 1000mhz

so being dumb, i research this and find a thread here on this forum that says "when you boost the frequency the board speeds up, looks like you overlocked the ram, yay for you those cheapos probably underclock it to start with and resell it for less, greed blah blah blah" and continue on.

My main reason to use this system is to render HD movies and not take forever. it isnt a powerful machine.
I just would hate to think that i need to run the ram a (nearly) a full 200mhz below stock.

the higher i changed the frequency, the higher the ram speed.

epiphany moment

so i guess i would be smart to start to decrease the CPU by say, 5mhz bits until the ram speed at the right multiplier settles on 800mhz huh?


 


well, going off pure memory here... i think their should be a ram multiplier somewhere in your system... if there isn't and when you change the FSB/cpu frequency the speed of the ram doesn't change in the bios then we know what the multipliers are.

example.

200 cpu frequency x 4 multiplier = 800 ram frequency.
so when your system advertizes a 800 ram frequency what it's really saying is it's a x4 multiplier. 500 would be 2.5 multiplier, and 1066 would be a 5 multiplier (or close enough)

so if your overclocked cpu is sitting on a 250, to match your 1066 ram, you'd need a multiplier of 4, or the 800 setting in your bios (which would make the ram run at 1000 or so...).

i would start with that, then i would work on the voltage to the ram, maybe bump it up a little... voltage to your northbridge/fsb if it's possible could be bumped too.

start with that and see what happens.
 

stevenjcampbell

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TY, i went back into the bios. loaded things to failsafes, then performance defaults, then went back and overclocked up to 2.4ghz and a ram multiplier that brings it to exactly 800mhz.

so far no problems, and am rendering at 100% load on the cpu, even this small 400mhz increase takes 10 minutes off rendering a video with lighting corrections etc.

cpu topping out at 57c which is fine to me.

I am expecting a "fun" time when i get my faster cpu. i think i might just invest in the 3ghz q9650 vs the 2.8x ghz q9550 as the speed isnt worth messing with like this.


 

stevenjcampbell

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I really appreciate you taking the time out for your well though out reply. seems like i already did that while you were typing, so my 800mhz ram is running at 800mhz according to the cpuz (400mhz but its dual channel so 400x2=800) and the bios.

thanks again.

(ps. using up 64% of the ram, using photoshop while rendering and all seems okay so far. )
 

stevenjcampbell

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Because I always hate it when I find threads that do not declare an answer properly:

1. It was ram riming.

2. go into bios. In case you have an old gigabyte mobo like me, the same place you tweaked the CPU is where you find ram.

3. Select a CPU frequency and then go look at the ram multiplier. There are only a few selections for this, but each time you change the CPU speed, up/down you can then select the ram multiplier you need.

4. Play with these numbers until you settle on a proper clock speed for the ram, as in my ram is spec at 800mhz, and now it is solid.

I did three different renders of movie files, ran photoshop AND powerdirector 11 and installed rayman legends all at the same time and had a max cpu of 61C, with a max gpu of 45c.

thanks again, this forum is one of the best places online in terms of how people help.
 


glad you got it worked out! :D