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View Full Version : Is DDR3 1333 OK for X58 OCing?


sillyeagle
01-12-09, 09:52 PM
I've been using nvidia chipsets the last two go arounds, with 680i being my last one, so I'm not familiar with Intel or specifically X58 overclocking. I'm basically wondering if 1333 memory will inhibit my OCing potential? I assume not being I should be able to lower the multiplier, but I don't know anything about X58.

With three channels I'm not worried about a high memory clock and am more interested in low latency, so I was thinking OCZ 1333 Cas 7 for $150. I'd like to get a 920 into the 3.5-4GHz range, but if 1333 memory will make that difficult I'll have to reconsider.

The system build is specifically for FSX, which is of course CPU bound, and FSX really likes low latency memory. I'm trying to stay as inexpensive as possible.

CaptNKILL
01-12-09, 11:25 PM
Should be fine. I researched this a bit when the i7 was released and this is what I found:

http://www.nvnews.net/vbulletin/showpost.php?p=1849238&postcount=76

And from what people say, the FSB is quite overclockable.

Viral
01-13-09, 12:09 AM
Yep, just make sure it's low voltage stuff.

BTW, for overclocking you'd run the memory at 1066 stock speeds, then up the memory slowly for overclocking. Just like an FSB setup higher stock speed memory is better for overclocking.

sillyeagle
01-13-09, 03:38 PM
Thanks captn, thats exactly what I was looking for. :)

breathemetal
01-13-09, 03:40 PM
I'd go a little higher. But it all depends how much you plan on ocing.

CaptNKILL
01-13-09, 06:57 PM
I'd go a little higher. But it all depends how much you plan on ocing.

It shouldn't be a problem really. The 920 has a multiplier of 20 so 1333Mhz ram using the lowest multiplier (6x) will get you a bus speed of 222Mhz, which is pretty high (default is 133) and the CPU would be running at 4440Mhz.

I think a nearly 2Ghz overclock on a quad core hyperthreaded CPU is about as far as most people are willing to take it. :lol:

sillyeagle
01-13-09, 09:42 PM
I see on the evga forum everybody wants to run at 1600. Why the obsession with running at 1600MHz? I have yet to see a real world test where there is any difference between dual and tri-channel, let alone 1333 and 1600. Heck, crysis performance is the same with 1066 Dual as it is with 1600 Tri. So I can't understand why people are obsessed with 1600.

EDIT:

http://www.techspot.com/article/131-intel-corei7-memory-performance/page15.html

the WinRAR performance test and CINEBENCH seemed to find DDR3-1333 memory to be the sweet spot rather than the more speedy 1600MHz modules.

The single module configuration delivered almost the same performance as the triple-channel configuration in the applications and games we tested.


At this point those looking to build a Core i7 system should consider buying low-latency DDR3-1066 memory, or at most 1333MHz memory.

This last line confirms my thoughts on the subject.