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OMG - 48GB RAM running on i7 990X LGA 1366 - Consumer!

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a c 716 V Motherboard
a c 347 } Memory
September 29, 2011 8:12:06 PM

:o  I am very rarely surprised about computers, specification, limits but I ran across this video clearly showing a Consumer LGA 1366 6XDIMM running 6X8GB or 48GB of RAM! It ran on an Intel i7 990X which is 'rated' for 24GB and on a Gigabyte G1.Assassin which is also 'rated' for 24GB or 4GB/DIMM density!

Gigabyte G1.Assassin - http://www.gigabyte.us/products/product-page.aspx?pid=3...
6 x 1.5V DDR3 DIMM sockets supporting up to 24 GB of system memory
Support for DDR3 2200/1333/1066/800 MHz memory modules


Intel i7 990X - http://ark.intel.com/products/52585/Intel-Core-i7-990X-...(12M-Cache-3_46-GHz-6_40-GTs-Intel-QPI)
Max Memory Size (dependent on memory type): 24 GB
Memory Types: DDR3-1066


Now if I were in Vegas my wad of money would be poof aka gone. I know the LGA Xeon can handle the 8GB/stick density, but not the Consumer i7 9XX lines.

Installation and proof of 6X8GB (48GB total):


Prime95 95 hour custom test for 48GB:
a c 121 V Motherboard
a b } Memory
September 29, 2011 9:11:05 PM

geez! What is this world coming to?
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a c 235 V Motherboard
a b } Memory
September 29, 2011 9:43:05 PM

Very interesting... I would expect motherboards and CPUs specifications to be understated a little, so there is some headroom over the max but not to that level.
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a b V Motherboard
a b } Memory
September 29, 2011 11:39:51 PM

Apple branded video card?
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a b V Motherboard
a b } Memory
September 30, 2011 1:19:47 AM

a lot of things going mysterious on this video
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a c 716 V Motherboard
a c 347 } Memory
September 30, 2011 2:00:35 PM

There's nothing 'mysterious' about the Apple decal, Linus did an unboxing of the Apple iPad2 and thought it was 'funny' to stick it on the GTX 590.

Scoll through ~3 minutes to see the 'mystery unfold' -> http://www.youtube.com/watch?v=RiZT81AiE7w
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September 30, 2011 5:34:15 PM

jaquith said:
There's nothing 'mysterious' about the Apple decal, Linus did an unboxing of the Apple iPad2 and thought it was 'funny' to stick it on the GTX 590.

Scoll through ~3 minutes to see the 'mystery unfold' -> http://www.youtube.com/watch?v=RiZT81AiE7w



nope, it's impossible. :pt1cable:  :pt1cable:  :pt1cable: 
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a b V Motherboard
a b } Memory
September 30, 2011 7:31:53 PM

So it runs 48gb of ram, how is this surprising?

They didn't have 8gb dimms back then, which is likely why they said it's limits were 24gb. No different than old Socket A mobos that said max was 1gb (256x4) and people were running 2gb (512x4)

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a c 716 V Motherboard
a c 347 } Memory
September 30, 2011 9:37:32 PM

I beg to differ they did and do have 8GB/stick, and 8GB/stick has been around for over 6 years in production. Further, both the i7 990X and Gigabyte G1.Assassin are newer production components AFTER P67/LGA 1155 release.

That said, I assumed the lithography for the i7 9XX CPU was completely different that of the Xeon. In fact, this is making me wonder if the Xeon, i7 9XX, or Sandy Bridge are 'limited' to even 8GB/stick?!

Intel should know better than ANY of us what their CPU's limits are, example:

Intel Xeon W5580 - http://ark.intel.com/products/37113/Intel-Xeon-Processo...(8M-Cache-3_20-GHz-6_40-GTs-Intel-QPI)
Max Memory Size (dependent on memory type): 144 GB / RDIMM types
Physical Address Extensions: 40-bit

Intel i7 990X - http://ark.intel.com/products/52585/Intel-Core-i7-990X-...(12M-Cache-3_46-GHz-6_40-GTs-Intel-QPI)
Launch Date: Q1'11
Max Memory Size (dependent on memory type): 24 GB
Physical Address Extensions: 36-bit

Intel i7-2600K - http://ark.intel.com/products/52214/Intel-Core-i7-2600K...(8M-Cache-3_40-GHz)
Launch Date: Q1'11
Max Memory Size (dependent on memory type): 32 GB
Memory Types: DDR3-1066/1333
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a b V Motherboard
October 1, 2011 1:42:34 AM

you have been able to install more memory than the motherboards/cpu's rated specs since forever. this is nothing new, it is not a one off, but it doesnt mean it will necessarily work, or be stable.
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a b V Motherboard
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October 1, 2011 2:50:32 AM

i know some of the new a75 chipset gigabyte boards are rated for 64gb lol
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a c 716 V Motherboard
a c 347 } Memory
October 1, 2011 3:13:21 AM

iam2thecrowe said:
you have been able to install more memory than the motherboards/cpu's rated specs since forever. this is nothing new, it is not a one off, but it doesnt mean it will necessarily work, or be stable.

This is almost never true, and I've seen far too many posts where the __GB/DIMM was exceeded and either Post Failure or the 'spec' RAM limit was available to the OS with the remainder H/W Reserved. Further, not to be confused with a bad stick(s).

Heck it's EASY to say after-the-fact ... 'I knew it would work!'
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