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DDR3 Ram Upgrade

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November 2, 2010 7:35:08 PM

Currently I have 3GB DDR3 PC3-10600 (broken down into one 2GB and one 1GB) that came with my HP Pavilion p6350z. As I was reading about upgrading it I was wondering if its okay for them to have installed a 2GB stick next to a 1GB stick. I want to get 2GB more ram, but I want to utilize dual channel capabilities.

I'm unsure if it would be more beneficial to get one 2GB stick, two 1GB sticks and put them next to each other, or one 1GB and one 2GB stick so I can match up with the installed 1GB and 2GB sticks (2GB + 2GB and 1GB + 1GB). I'm not sure if I'm misunderstanding how to go about this or not. I read the FAQ and some other threads, so sorry if I'm being redundant!

Here is my PC specs:
Windows 7 Home Premium (64-bit)
Foxconn H-RS880-uATX Motherboard
Athlonll X4 630 (P) (2.8GHz / 4000 MHz HT3) AM3; 2 MB L2 cache (95W)
3 GB (1 x 2 GB, 1 x 1 GB) DDR3 PC3-10600
500 GB 7200 rpm SATA 3G (3.0 Gb/sec)
SAPPHIRE Radeon HD 5770 1GB 128-bit GDDR5
SoundBlaster X-Fi Xtreme

Memory slots: 4 DIMMS
Maximum memory: 16 GB (4 x 4 GB) (64-bit OS)

More about : ddr3 ram upgrade

November 4, 2010 2:02:54 AM

Okay, I figured it out with CPU-Z I think. "Channel #: Dual" should mean the currently installed 1GB + 2GB sticks I have are running in dual channel mode. I also says "DC Mode: Unganged," which seems to mean each CPU core uses a different stick.

So basically I think it's best for me to get two more 1GB sticks or two more 2GB sticks. This way I can preserve dual channel and unganged mode. Correct me if I'm wrong?
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a c 347 } Memory
November 7, 2010 3:19:11 PM

^ You do NOT want the mix-match Dual or Quad Channel RAM, and you ONLY want to purchase Dual Channel MATCHED sets. HP didn't give a crap about warning you! Further, you do NOT want to mix-match Speed, CAS, or Voltage.

Therefore, if you want your PC to run 'properly' then please list the RAM Part-Numbers; use CPUz:


More than likely, your 1GB is going bye-bye to trade-off for a match-set Dual Channel kit...
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November 7, 2010 5:26:15 PM

Here's what I have now...

Slot 1 & 2: DDR3
Module Size: 2048 MBytes
Max Bandwidth: PC3-10700 (667 MHz)
Manufacturer: Crucial Technology
Part Number: CT25664BA1339.M8FD
Frequency: 533 MHz - 609 MHz - 685 MHz - 761 MHz
CAS# Latency: 7.0 - 8.0 - 9.0 - 10.0
Voltage: 1.50 V - 1.50 V - 1.50 V - 1.50 V

Slot 3: DDR3
Module Size: 2048 MBytes
Max Bandwidth: PC3-10700 (667 MHz)
Manufacturer: Micron Technology
Part Number: 16JTF25664AZ-1G4F1
Frequency: 533 MHz - 609 MHz - 685 MHz - 761 MHz
CAS# Latency: 7.0 - 8.0 - 9.0 - 10.0
Voltage: 1.50 V - 1.50 V - 1.50 V - 1.50 V

Slot 4: DDR3
Module Size: 1024 MBytes
Max Bandwidth: PC3-10700 (667 MHz)
Manufacturer: Samsung
Part Number: M378B2873EH1-CH9
Frequency: 457 MHz - 533 MHz - 609 MHz - 685 MHz
CAS# Latency: 6.0 - 7.0 - 8.0 - 9.0
Voltage: 1.50 V - 1.50 V - 1.50 V - 1.50 V

Slot 3 and 4 is what came with my pre-built HP.
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a c 347 } Memory
November 7, 2010 5:33:52 PM

Crucial 'is' Micron; Micron owns Crucial.

-> HP didn't give a crap about warning you!
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November 7, 2010 7:10:47 PM

I removed Slot 4. I think the performance seems a bit better...
I used the Crucial Scanner, but didn't buy it at their site.
This is the exactly what I purchased for reference: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Are you saying the 2GB stick HP gave me is PC3-10700? Is that why the Crucial slots are also reading as PC3-10700? I'm sure those were PC3-10600.

Not sure if I can put down the money for another set of the Crucial RAM at the moment. Will the 6GB set up work for the time being?

I have the kit I bought installed next to each other, and the 2GB Micron is by itself.
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a c 347 } Memory
November 7, 2010 7:34:39 PM

PC3-10700/8 = 1337.5 MHz
PC3-10600/8 = 1325.0 MHz
DDR = Double Data Rate ; CPUz will show 667 MHz X 2 = 1333 MHz

Most 1333 MHz RAM is 10666/10660/10600; it's the oddest speed of the bunch. The problem is they're not 'ideally' compatible with each other. Mix-Match

Most important, ANY MOBO runs best when ALL the RAM is 'cloned' same; that's why I was was suggesting you purchase another EXACT set of CT25664BA1339...

Will your PC run - probably; Ideally - ehh verdict is still out ; Better than before - I'd wager yes.
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November 10, 2010 11:37:02 PM

Best answer selected by Shizoku.
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a b } Memory
November 11, 2010 11:25:47 AM

This topic has been closed by Maziar
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