Proper configuration 8 gb OCZ AMD ram on UD5P motherboard

The low speed from CPU-Z is likely the 'raw' RAM speed - it's DDR2 - which means a transfer on both the rising and falling edge of the clock - hence, your 550 is likely 1100...

DDR means a transfer on both the rising and falling edge of the clock ... the 2 has nothing to do with that fact. What I am confused about is what RAM the OP is actually using. Since when is DDR2 spec 1.65V (low voltage sticks are 1.8)? and why the heck is his system even booting at 1.5V? I did a google on "OCZ platinum AMD edition" and the only thing I could find to match that was

http://www.ocztechnology.com/products/memory/ocz_ddr3_p...

DDR3?

/headscratch  

Aside from all that confusion, if CPU-Z is showing you 550MHz billbat is correct ... 1100 is your actually speed. Is it showing that you are running in dual-channel mode?

1100MHz is blistering fast for DDR2 (1200 is the limit without overclocking), so don't mess with anything as long as the system is working.

According to this document from Gigabyte

http://www.giga-byte.com/FileList/MemorySupport/mb_memo...

you shouldn't even be able to run 4 sticks of RAM at 1100MHz, so I honestly don't know what is going on.

That was my first thought, too... I thought you were limited to two DIMMs at any speed appreciably past 800...

Hi Folks and thanks for the responses.

I guess I wasn't clear enough. I have a Gigabyte MA790FXT AM3 board running 8 gigs of DDR3-1600 ram. OCZ3P1600LVAM4GK.

CPUZ shows 8192 Mbytes, Dual channel, Unganged, as well as this info:

DRAM Freq: @535.8 MHz
FSB RAM 3:8
CL: 7.0 clocks
tRDC:7 clocks
tRP: 7 clocks
tRAS: 16 clocks
tRC: 27 clocks
CR: 1T

On the SPD board, All voltages are at 1.5 volts and the frequency and timings range from 380 MHZ (5-5-5-12) for JEDEC 1 to 609 MHz (8-8-8-19) for JEDEC 4.

Why does the Max bandwidth say PC3-8500F (533 MHz) and a part # OCZ3P1600LVAM2G For each slot ???

Should I do anything else?

Thanks

It seems the problem is the FSB to RAM ratio. Try 1:1 and see what happens. (I'm not that familiar with AMD bios). In reference to the above posts: Its Double Data Rate (DDR) that requires the multiplication to get the actual speed.

Best answer selected by dhoke.

Hi DS nooks and others

I did set the mem clock to x8 reflecting 1600 mHz. The auto settings are now at 11-11-11-30. The system is stable with this config. I did try the timings 7-7-7-24-2T but the system was unstable.

I must be missing something on the CPU NB VID control. I was going to set this at 1.35 volts as the OCZ moderator "Roy" suggested, but I'm not sure how to do this. Although a voltage setting for CPU NB is given, there is no voltage listed for CPU NB VID ?? There is the ability to change this setting from "normal" to various incremental voltages above and below the normal setting but no actual voltage is listed.

Should I dial back the mem clock to achieve better timings? Should I allow the system to determine the timings based on the mem clock setting or use specific timings. Another user with this setup is using 6-6-6-18-2T at 1300 MHz. I wonder if this is the best that can be achieved with 4 sticks.

Thanks

If you are interested in playing with the settings further (for whatever reason) I would suggest you start a thread at the forum I linked earlier, and a tech from OCZ will guide you with recommendations specifically tailored to your situation. I can't believe you have the system running at 1600MHz. Even with the timings dialed down so far, that's quite impressive with 4 sticks installed.

ds--I will. Right now I'm running 1333 MHZ and 6-6-6-18 2T. After reading an informative article on AMD memory settings on an AM3 Gigabyte UD5P, there does not appear to be a lot of performance difference between tight timings at 1333, or loose timings at 1600; this appears to depend on the specific application.

We appear to have the same basic system.

Thanks again for your help