Nforce 570SLI Memory Compatibility

Micro-star international / K9nsli
February 24, 2009 at 19:00:13
Specs: Windows XP Pro, AthlonXP 1gb

my teen son does a lot of heavy duty gaming. His PC has an unlocked black edition Athlon 64 (5000+?) overclocked with 2 gb of OCZ reaper 800MHz ram with a 9800GTX+ graphics card in an MSI K9N SLI (Rev 1) motherboard with the NForce 570 chipset. The board is a bit old now but seems to run things fairly smoothly although it would probably run a lot better in something newer.

He's looking for more memory and things have gone beyond 800MHz memory although this is the max speed mentioned in the manual. Does anyone know the max speed either for this particular board or for the NForce 570 Chipset?

I could use the existing 2 GB of 800MHz ram in another PC and maybe get him 4GB in 2 modules of something quicker if the board will run it.

See More: Nforce 570SLI Memory Compatibility

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February 24, 2009 at 23:00:54

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February 25, 2009 at 04:20:48

I've done more searching and found someone at the following link who says he works for the CPC-SA (anyone know who that is?) and says about the MSI K9N SLI Platinum boards:

"It is possible to run 1066Mhz RAM (assuming the 200Mhz LDT speed is selected)"

although I'm not sure what LDT speed is - any guidance appreciated!



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February 25, 2009 at 06:32:50
I guess another question on this is whether the board would just run faster memory at 800MHz. Another option could be to buy 2 2GB modules of faster memory (doubling PC memory) and run them at 800 MHz and then run them at the correct speed when I upgrade the motherboard in a few months' time? This would save me being lumbered with slow memory when the board gets upgraded. Does anyone have a view on whether PC8500 memory would just be run at 800MHz?



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Related Solutions

February 25, 2009 at 07:55:30
There's no reason to get DDR2-1066 (PC8500). It's not supported by either the CPU or the will automatically underclock to DDR2-800 speed. To be able to run DDR2-1066 at full speed, you'd need to upgrade both the CPU & motherboard. Only the quad core X4 Phenom or it's derivatives (X2 Kuma or X3 Toliman) support DDR2-1066 & the motherboard would have to be upgraded to a socket AM2+.

As for overclocking, it's very simple with the Black Edition. Basically, all you have to do is raise the CPU multiplier & *possibly* the CPU voltage...very few of the other settings need to be touched. However, changing the multiplier *may* affect the RAM speed, so you *may* have to increase the CPU reference clock to compensate for the dropoff in RAM speed.

As for the LDT: AMD abandoned the old FSB technology over 5 years ago...LDT (Lightning Data Transport aka HyperTransport) is the replacement. The LDT/HyperTransport bus is the product of the CPU frequency (aka reference clock) & the LDT multiplier. On your system, the LDT is designed to run at 1000MHz (200MHz x 5). When it comes to overclocking, you need to know that the LDT does NOT tolerate overclocking very should be kept as close to the default speed as possible. If you increase the CPU reference clock, you automatically increase the LDT.

The 5000+ Black Edition *should* be able to run at 3.2GHz (16 x 200MHz) with a slight voltage increase (approx 1.40v). I'll download the motherboard manual, check out the BIOS chapter & post back with some settings to try.

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February 25, 2009 at 10:09:52
Hi Jam

thanks for the feedback. It isn't a huge problem that it throttles the memory back to 800MHz, it is just that I'd be reluctant to buy 4GB of 800MHz memory if the standard has now increased. When the board gets upgraded, it would probably be able to make use of the extra speed. Thanks for the LDT info.. I'll also be interested to see the overclock recommendations.


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February 25, 2009 at 11:28:00
The memory controller is built into the CPU & the CPU you have supports up to DDR2-800 only. Upgrading the motherboard won't do a thing to help unless you upgrade the CPU at the same time. Regardless, you're performance concerns about DDR2-800 vs DDR2-1066 really aren't warranted. Even if it was supported, the performance gains would be minor. Besides, you'd have to dump the DDR2-800 altogether & get 4GB of DDR2-1066, otherwise the DDR2-800 would cancel out the DDR2-1066 & force it down to DDR2-800 speed. And DDR2-1066 is considerably more expensive. 4GB (2 x 2GB) of DDR2-800 can be had for about $25 these days. Just stick with what you have. By the time you're ready to upgrade, DDR2-1066 prices will most likely have dropped. BTW, there's no need to buy "premium" RAM such as Reaper. You probably paid well over $50 for 2GB. 4GB of Corsair goes for $25 & there's no appreciable performance difference.

BIOS settings are coming up!

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February 25, 2009 at 11:41:44

Most all the overclocking is done thru the Cell Menu:

Cool’n’Quiet = disabled
Adjust Extra CPU Voltage (V) = ? not sure about this.
CPU Frequency (MHz) = 200
CPU Dynamic OverClocking = disabled

CPU Frequency Configuration:
Adjust CPU Ratio = 16
CPU Voltage = 1.40v

Memclock Mode = manual
Adjust DDR Voltage = 2.1v

Memory Configuration:
MCT Timing Mode = manual
CAS Latency (TCL) = 4
Min RAS# Active Time (TRAS) = 15
Row Precharge Time (TRP) = 4
RAS# to CAS# delay (TRCD) = 4
Row to Row delay (TRRD) = auto?
Row cycle time (TRC) = auto?
Row refresh Cycle time (TRFC) = auto?
Read to Write delay (TRWT) = auto?
Bank Interleaveing = enabled
CMD-ADDR Timing Mode = 1T is faster but *may* be unstable; 2T is stable but slower

PCIE Frequency (MHz) =100

Spread Spectrum Configuration:
CPU/LDT Spread Spectrum = disabled
PCIE Spread Spectrum = disabled
SATA Spread Spectrum = disabled

FYI, I looked up Reaper DDR2-800 at the OCZ website & found the specs as 4-4-4-15 @ 2.1v. You may wanna double check to make sure it's the right RAM.

Assuming the above settings work, the CPU will run at 3.2GHz with the RAM at 800MHz DDR, the HT/LDT bus at 1000MHz & the PCIe bus at 100MHz.

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February 25, 2009 at 12:58:27
Hi Jam

thanks very much for all the info. We'll give it a go!


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