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XMS3200XL Platinum TwinX & A8N-Sli Deluxe 1T Issues


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I believe the problem is a known motherboard issue, however I would like to hear peoples inputs here.


Basicaly, any attempt to run the RAM above around 240Mhz with 1T results in instability (random restarts, programs crashing and memory read errors). The same settings with 2T, and it runs perfectly fine. I tried 3-4-4-8-1T even at 245Mhz, and still instability.


I believe the chips on the RAM are rated at 250Mhz. Is this issue well known? I would like to run these at tighter timings with 1T and around 250Mhz :(


Any ideas?

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Fremont, CA, May 26, 2004: Corsair Memory, Inc., a global leader in ultra-performance DDR memory modules for PC gamers and enthusiasts, today announced a new family of “XL” memory modules that supports 2-2-2-5 latencies at 400MHz, making the XL family the highest performing PC3200 memory in the world. The new XL product family includes the following products:


TwinX1024-3200XLPRO - matched pair of 512MB, DDR400, 2-2-2-5, XMS Pro Series modules

TwinX1024-3200XL - matched pair of 512MB, DDR400, 2-2-2-5, black XMS modules

TwinX1024-3200XLPT - matched pair of 512MB, DDR400, 2-2-2-5, platinum XMS modules


In addition to 2-2-2-5 performance at PC3200, the 3200XL family demonstrates excellent performance at higher clock frequencies. Typical results seen in the Corsair lab were 2.5-3-3-7 at XMS4000 (250 MHz) clock speeds.


These modules were designed specifically to give plenty of overclocking headroom for performance tweakers. At slightly higher latencies these modules can yield stable operation at speeds up to 500MHz. Corsair designed these modules with the unique ability to function both at 400MHz with extremely low latencies, and at very high clock speeds with looser latencies.


"The new XL family of XMS products supports obscenely low latencies that we thought were simply not possible” said Corsair VP of Product Development, John Beekley. “Our development efforts have really paid off with a product that not only supports the world’s fastest latencies at 400MHz but also provides outstanding overclocking headroom. The XL family will deliver awesome performance in Intel- and AMD-based systems alike.”


Further information and specifications on this product and other XMS products can be found at Corsair's web site (http://www.corsairmemory.com/corsair/xms.html). These modules can be purchased through Corsair’s authorized sales channels listed at http://www.corsairmemory.com/corsair/buy.html.


How come all review sites say they are 250Mhz TCCD Samsung chips?


TwinX1024-3200XLPT is part number

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They use TCCDs, yes, however they're not guaranteed by Corsair at those speeds. I'm not going to go into the intricacies of downbinning (feel free to search the forums on my long posts explaining the concept), but that's what it comes down to. The ICs used in 3200XLs may or may not have been tested @ 250 Mhz by Corsair or Samsung. Any speed obtained higher than 200 Mhz is good fortune and nothing more. Is there a good chance they'll do 250 Mhz? Sure. Expecting (or demanding, which is what some have foolishly done) more is stupid, as they're simply not guaranteed @ 250 Mhz.


Note: I'm not assuming that anyone reading this post does or does not know what downbinning is, hence suggesting the search. I never assume other's knowledge base, I just lay out the info for all.

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I guess the reviews kind of misled me, but the RAM runs fine with 2T, there's been many having issues with this board running 1T at Memclocks of around 240ishMhz.


Right now running at 245Mhz, seems fine. (2T though 3-3-3-7)

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