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Old November 26, 2009, 08:43 AM
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3GB Dual Channel DDR2 SDRAM at 800MHz- 3 DIMMs
Amd 780G chipset, it's been a while since I was in AMD land, but don't you still need an even number of DIMM's for dual channel?

I would presume this would revert to single channel operation, which would probably be pretty crippling to a Phenom II X4 820.
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Old November 26, 2009, 08:50 AM
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It might be able to run two sticks in dual-channel mode and the third in single-channel. I know Intel memory controllers can do that but I'm not sure about AMD.
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Old November 27, 2009, 05:07 AM
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I know your out there AMD users.
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Old November 29, 2009, 10:12 AM
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Did you quote that from a PC manufacturer? They might have meant 2 DIMMs, since they do have access to 1.5GB modules. Either way, Athlon II/Phenom II processors run single-channel (unganged) mode by default:

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The main selling point of this brand new AM3 platform is the much awaited support for DDR3. Official support is for dual-channel DDR3-1333 in unganged mode, however the integrated memory controller (IMC) built into each processor does have a multiplier to support DDR3-1600. For those of you unfamiliar with the term unganged, the Phenom II's IMC is implemented as two seperate 64-bit controllers rather than a single 128-bit interface. As a result, the platform can either emulate a single 128-bit dual-channel mode (ganged) or operate as two independent 64-bit memory controllers capable of processing two memory requests simultaneously (unganged). The latter is faster in multi-threaded scenarios, while the former is better for single-threaded environments, but also puts more strain on the IMC and thus is relegated to slower DDR3-1066 memory speeds.
Source.
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Old November 30, 2009, 04:48 AM
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It's a Dell, that's what they say on their spec page.

The Dell Online Store: Build Your System
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Old November 30, 2009, 03:43 PM
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Originally Posted by Dr_BenD_over View Post
It's a Dell, that's what they say on their spec page.

The Dell Online Store: Build Your System

Looks like they need to fix their options selections

It should be pairs when cpu has dual memory controllers
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Old November 30, 2009, 09:37 PM
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The way the 3gb of ram works like this - 2 x 1gb modules + 2 x 512mb modules. New chips seem to run dual channel just fine with different densities providing they are in pairs ie: 2 x 2gb + 2 x 1gb for dual channel, or 2 x 1gb +2 x 512mb for dual channel ect
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