Ram Issues

paradisiac

paradisiac

paradisiac

Soldato
Joined
22 Mar 2009
Posts
7,754
Location
Cornwall
well i have been struggling to OC on my new mobo, so been told to go back to basics and start again. now it would appear the problem is down to my ram. its DDR1066, it runs fine and passes memtest if its left to that, but as soon as i force 1066 it causes issues and memtest fails.
is there anything i can do to rectify this? i have tried putting the timing and voltage settings in manually but still the same.
 
4-1.jpg


not sure if this has any relevance but do i need to do something to change it from EPP 1 to EPP 2?
 
If your getting faults with the RAM running at recommended settings then I would RMA the ram.

I had a similar problem with my i7 setup and OCZ ram, run it at 1600mhz windows failed to load, run any other settings no problems.
 
Have you tried setting DRAM timing control to manual and setting the timings yourself? also change DRAM voltage to Manual and set the correct voltage manually.
 
yeah i tried that and it did the same, it just seems to be locked to EPP 1.0, guessing its possibly a mobo issue, as i have tried it with 1 stick at a time in all 4 slots and it still does it so the chances of 4 sticks all being faulty doesnt seem right.
 
I've not used EPP profiles before, but have used XMP - the intel equivalent.

I wouldn't worry about the SPD tab in CPU-Z so much - this just tells you what is programmed onto the SPD chip of the memory, and nothing to do with what speed the memory is actually running at.

You should be able to select either EPP#1 or EPP#2 profile in the motherboard BIOS, which will set all memory timings and voltages accordingly. If your motherboard doesn't support these profiles, you wil have to manually enter all the information.

My guess is that on Auto, your memory is running at the fastest JEDEC standard it's programmed with (5-5-5-18 @ 1.8V) which seems to be working at 500MHz but obviously fails at 533MHz (DDR 1066).

You will either need to find the EPP setting, or program the following manually for DDR 1066 (according to the SPD Data):

DRAM Frequency = 533
CAS# Latency (CL) = 5
RAS# to CAS# (tRCD) = 6
RAS# Precharge (tRP) = 6
Cycle Time (tRAS) = 15
Command Rate = 2T (sometimes shown as 2N)
Voltage = 2.3 V

You might want to check you motherboard can handle these voltages as I'm not familiar with your setup.
 
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