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Single channel vs dual channel and xmp vs non

Last response: in Memory
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March 6, 2010 4:40:13 AM

I was looking at the supported memory types on the gigabyte website and i have know clue what ss or ds memory are and i have no idea what XMP memory is. What are the differences and which is better. I know that these boards support triple channel DDR3 memory, but i was wondering if i am better of with 6gb of 1800 ddr3 mem or 8gb of ddr3 1600 mem. Am i better off with ss or ds. I also wanted to know if i should bother with XMP memory since it is supported on the gigabyte boards. Any insight into this would be very much appreciated.

I am going to purchase a gigabyte GA-EX58-UD5 or GA-EX58-UD7 mobo or maybe even an ASUS P6X58D mobo, im still undecided.
a c 80 } Memory
March 6, 2010 1:06:21 PM

SS = Single-Sided module (8 chips)
DS = Dual-Sided module (16 chips)
XMP = Intel Extreme Memory Profile http://www.intel.com/Consumer/Game/extreme-memory.htm

You should probably buy a well rated 6GB kit that runs at 1.5V and not worry too much about the rest. The best is to select a kit that's known to work well with your motherboard.
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March 6, 2010 4:43:48 PM

thanx alot. i just checked out that link it was useful. I dont plan on overclocking at the moment so ill forget about the XMP. I might at one point down the road so i guess i could always upgrade when i do.
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a c 80 } Memory
March 6, 2010 4:56:01 PM

You don't necessarily need to upgrade the RAM to overclock the CPU. You need to upgrade it only if you plan on also overclocking the RAM. DDR3-1600 or faster RAM often is overclocked.
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March 6, 2010 6:26:04 PM

I just realized that the gigabyte UD5 shows that it can use DDR3-1600mhz ram or higher but the i7-920 core shows support only with 800 or 1066mhz . So is it impossible to use 1600mhz with that setup? Are higher mhz rams beneficial for performance? I would be wiiling to use a different processor if it would be. I just thought the i7-900series were supposed to be the cream of the crop.

One other thing. Is it important to only buy memory that is is on the supported memory list for whichever motherboard im gong to buy? I thought that meant that those were the only ones they tested and it didnt mean others wouldnt work just a good with the mobo.
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a c 80 } Memory
March 6, 2010 6:41:47 PM

That question probably is asked at least once day. The i7-920 will support memory speed over 2000 MHz if you can find such modules that require 1.65V or less. It provides little performance boost over 1333 MHz modules.

You should buy quality modules that are certified by the motherboard manufacturer, the RAM vendor or rely on other members who use that RAM with that motherboard. Since the X58 platform has been out for a while, the risks of running into serious incompatibilities definitely has decreased, but the faster the RAM is, the more likely you might run into unexpected issues, particularly if you install more than 3 modules.
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March 6, 2010 7:44:15 PM

I was going to purchase 3x 2gb DDR3-1600 or 1800 with the gigabyte GA-X58A-UD5 and the intel core i7-930 cpu. So your saying as long as i meet the voltage requirement ill run at 1600 or 1800 or do I need to overclock to run at 1600 or 1800?
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a c 80 } Memory
March 6, 2010 7:48:39 PM

Since they'll be overclocked, they most likely won't be detected at 1600 or 1800. You'll need to set the voltage and timings manually. What modules will you buy?
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March 6, 2010 7:59:40 PM

i dont want to overclock. so am i better off just getting 1333mhz or 1066mhz?
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a c 80 } Memory
March 6, 2010 8:31:37 PM

It's up to you, but getting quality modules that should run at 1600 MHz isn't a bad idea if the cost is reasonable. You can expect them to run well at 1333 MHz with tighter timings.

Did you read this article? http://www.tomshardware.com/reviews/memory-scaling-i7,2...
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March 6, 2010 9:12:30 PM

I just read the article. Thanx. Im going to go with OCZ Gold 6GB DDR3-1600

http://www.newegg.com/Product/Product.aspx?Item=N82E168...
since its recommended at the gigabyte site for theGA-X58A-UD5 mobo. That and the intel core i7-930 cpu and i think ill have a pretty nice system. Just to clarify something... do i have to overclock to run at or near 1600mhz. And if i do can i not and just run at the default system specs and overclock down the road. I saw u mention using tighter timings to run well at 1333mhz. Is that kind of adjustment condidered overclocking? Sorry for being a newbie with tons of questions.
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a c 80 } Memory
March 6, 2010 11:50:02 PM

You can use CPU-Z, SPD tab to view what speed, timings and voltage the modules support. Then manually set them to one of the profiles. The lower the speed, the tighter the timings. For example, very good modules might have 8-8-8-24 timings at 1600 MHz and 7-7-7-20 timings at 1333 MHz. Overclocking is running modules at a speed that exceeds what they were designed for (which probably applies to most DDR3 module that runs at over 1333 MHz).
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