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Memory Ram

August 29th, 2011

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Memory / RAM?

I'm trying to learn a little more about memory/ram, so bear with me...

What is the difference between DDR2 RAM and DDR2 Dual Channel?

I'm trying to build a reliable and modern computer yet all I know to judge by other than the specifications are the prices, What are the big names in Memory/Ram + who can I trust most? (feel free to elaborate)

What are the compatibility issues regarding memory/RAM and multi-core processors? Is there a certain standard I should aim for as far as bus speed?

Basically, I just want a RAM/Memory DDR DDR2 Dual Channel pc4200 pc5400 pc6400 pc8000 pc8500 lesson.

DDR2 RAM is any stick of RAM that is considered to be DDR2 and not DDR.
Secondly I'm not exactly sure what the other two people tried to tell you here. Contrary to ustazshi's thoughts, DDR RAM can be run in dual channel. So can DDR2 RAM. Now to explain what dual channel is.

Dual channel means that your RAM works in parallel with each other. For dual channel to work, you must have two identical RAM DIMMS positioned properly on your motherboard! Most new motherboards color-code the correct slots.
Think of dual channel as this:

You have one cashier who can process 100 items per minute. Let's say this is a 1 GB stick of RAM.
Then, you have two cashiers who can also process 100 items per minute. However, each only has to process 50 items. Think of this as 2 sticks of 512 MB of RAM.

So the one cashier will process 100 items in 1 minute. Whereas the two cashiers will process a total of 100 items on half that time. Although dual channel doesn't actually make your computer run twice as fast or anything, it can usually give you a significant boost in performance.

These days, the standard for computers is DDR2. Intel's 775 socket and AMD's AM2 all use DDR2. Prices for DDR2 have dropped a lot recently. For the best price/performance you should get 2x 1 GB of PC2-6400. This is 2 sticks of 1 GB DDR2 RAM that run at 800MHz.
Although the frequency of the RAM is important, the timings (latency) is also very important. The timings are usually 4 numbers with dahes between them (#-#-#-#). These represent clock cycles- how much your RAM waits before going on to the next cycle. Ideally, it's best to have the lowest timings and highest frequency. DDR2 800MHz RAM has different timings depending on the product, but something like 5-5-5-12 is ok. Lower is better, but more expensive.

Finally, some reputable companies include:
Corsair, Crucial, G.Skill, Geil, Mushkin, OCZ, Patriot, Team Group.
These companies churn out high-quality RAM, and for some reasons their 2 GB kits are extremely cheap now (at least in Canadian markets).

Hope this is helpful!

Find Memory Ram On eBay Below:

Acer Iconia Tab NTL5DAA001 101 Inch 16GB Memory 1GB RAM WIFI White
Acer Iconia Tab NTL5DAA001 101 Inch 16GB Memory 1GB RAM WIFI White
$199.00
KVR533D2N4 512 Kingston 512MB PC2 4200 DDR2 533MHz non ECC Unbuffered CL4 240
KVR533D2N4 512 Kingston 512MB PC2 4200 DDR2 533MHz non ECC Unbuffered CL4 240
$7.49
8GB KIT Memory RAM for Panasonic Toughbook 53 Mk3 CF 53 Touchscreen B7
8GB KIT Memory RAM for Panasonic Toughbook 53 Mk3 CF 53 Touchscreen B7
$39.00
Corsair Vengeance 16GB 2 x 8GB DIMM DDR4 3000 PC4 24000 DDR4 SDRAM Memory
Corsair Vengeance 16GB 2 x 8GB DIMM DDR4 3000 PC4 24000 DDR4 SDRAM Memory
$105.50
Lot of 4 Axiom 4GB PC3 10600U Unbuffered Desktop Computer Memory Unit RAM
Lot of 4 Axiom 4GB PC3 10600U Unbuffered Desktop Computer Memory Unit RAM
$38.99
2GB 2x 1GB Kit Acer Aspire 1640 1640z 1650 3100 3200 3620 3670 3680 3690 Memory
2GB 2x 1GB Kit Acer Aspire 1640 1640z 1650 3100 3200 3620 3670 3680 3690 Memory
$12.90
Micron Crucial 2GB DDR PC2100 DIMM
Micron Crucial 2GB DDR PC2100 DIMM
$12.99
New 4GB DDR4 2133MHZ PC4 17000 288Pin DIMM Desktop For Intel  AMD Memory RAM +
New 4GB DDR4 2133MHZ PC4 17000 288Pin DIMM Desktop For Intel AMD Memory RAM +
$17.00
Lot of 6 4x Nanya 2GB 2RX8 PC3 10600U + 2x Elpida 1GB 1Rx8 PC3 10600U RAM Sticks
Lot of 6 4x Nanya 2GB 2RX8 PC3 10600U + 2x Elpida 1GB 1Rx8 PC3 10600U RAM Sticks
$26.99
Lot of 2 Crucial 4GB DDR3 1600PC3 12800UD Memory RAM Sticks CT51264BA160B
Lot of 2 Crucial 4GB DDR3 1600PC3 12800UD Memory RAM Sticks CT51264BA160B
$26.99
For Samsung RAM 16GB 2x8GB PC3L 14900 DDR3 1866MHz 204Pin SODIMM Laptop Memory +
For Samsung RAM 16GB 2x8GB PC3L 14900 DDR3 1866MHz 204Pin SODIMM Laptop Memory +
$54.33
Lot of 5 1x Ramaxel 4GB 1Rx8 PC3 +1x SKHynix 4GB 2Rx8 PC3 +3x Hynix 4GB 2Rx8 PC3
Lot of 5 1x Ramaxel 4GB 1Rx8 PC3 +1x SKHynix 4GB 2Rx8 PC3 +3x Hynix 4GB 2Rx8 PC3
$45.99
ATP 8GB ECC Memory Low Profile XQ16Y8E8GS B SK 8gb ddr3 ecc low profile memory
ATP 8GB ECC Memory Low Profile XQ16Y8E8GS B SK 8gb ddr3 ecc low profile memory
$49.99
16GB DDR3 Registered ECC CL7 Memory ICXM445 1066ER HY 16GB PC3 8500 Server
16GB DDR3 Registered ECC CL7 Memory ICXM445 1066ER HY 16GB PC3 8500 Server
$39.99
PC HP TBD6
PC HP TBD6
$250.00
New Hynix 2GB DDR2 800MHz PC2 6400 Desktop DIMM Memory RAM 240pin Non ECC
New Hynix 2GB DDR2 800MHz PC2 6400 Desktop DIMM Memory RAM 240pin Non ECC
$8.37
Corsair PC3 12800 4GB DIMM 1600 MHz PC3 12800 DDR3 Memory CMZ16GX3M4A1600C9
Corsair PC3 12800 4GB DIMM 1600 MHz PC3 12800 DDR3 Memory CMZ16GX3M4A1600C9
$32.01
4GB DIMM Desktop Memory PC3 10600 240Pin PC RAM for SAMSUNG DDR3 1333MHZ 240Pin+
4GB DIMM Desktop Memory PC3 10600 240Pin PC RAM for SAMSUNG DDR3 1333MHZ 240Pin+
$14.22
8 Pcs Set CPU Copper Heat Sink for DDR DDR2 DDR3 RAM Memory Cooler Radiator
8 Pcs Set CPU Copper Heat Sink for DDR DDR2 DDR3 RAM Memory Cooler Radiator
$7.70
PC ASUS TBD7
PC ASUS TBD7
$220.00
Lot 12 Micron MT36JSZF51272PZ 1G1F1BA 4GB 2RX4 PC3 8500R Server RAM Memory
Lot 12 Micron MT36JSZF51272PZ 1G1F1BA 4GB 2RX4 PC3 8500R Server RAM Memory
$56.99
Crucial PC2 6400 2 GB SO DIMM 800 MHz DDR2 SDRAM Notebook RAM Single module
Crucial PC2 6400 2 GB SO DIMM 800 MHz DDR2 SDRAM Notebook RAM Single module
$9.99
PC ACER TBD8
PC ACER TBD8
$220.00
Lot 11 Elpida PC3 8500U Ramaxel PC3L 12800U Nanya PC3 10600U 1 2 4GB RAM Memory
Lot 11 Elpida PC3 8500U Ramaxel PC3L 12800U Nanya PC3 10600U 1 2 4GB RAM Memory
$45.99
Tablet ASUS TBD9
Tablet ASUS TBD9
$150.00
Kingston KCP421SS8 8 Brand New
Kingston KCP421SS8 8 Brand New
$276.00
64MB Hyundai PC100 SDRAM 100MHz HYM7V64801 TFG 10 AA 168 pin DIMM Desktop memory
64MB Hyundai PC100 SDRAM 100MHz HYM7V64801 TFG 10 AA 168 pin DIMM Desktop memory
$3.99
Tablet GENERIC QUAD TBD10
Tablet GENERIC QUAD TBD10
$210.00
Atech 2x 2GB DDR2 PC2 6400 DIMM 800 MHz
Atech 2x 2GB DDR2 PC2 6400 DIMM 800 MHz
$14.00
512MB 1Rx8 PC2 5300U 555 12 ZZ  M378T6553EZS CE6 Memory Samsung
512MB 1Rx8 PC2 5300U 555 12 ZZ M378T6553EZS CE6 Memory Samsung
$5.50
4x4GB Micron MT36HTF51272FDY 80EE1D6 Memory RAM 4Rx8 PC2 6400
4x4GB Micron MT36HTF51272FDY 80EE1D6 Memory RAM 4Rx8 PC2 6400
$3.99
Kingston KVR16S11S8 4 4GB RAM 1600MHz DDR3 Non ECC CL11 SODIMM For Laptop
Kingston KVR16S11S8 4 4GB RAM 1600MHz DDR3 Non ECC CL11 SODIMM For Laptop
$35.41
Tablet QUAD USED TBD11
Tablet QUAD USED TBD11
$210.00
Nanya 1GB Memory DDR2 SDRAM DIMM PC2 6400 240 Pin 800Mhz NT1GT64U88D0BY AD
Nanya 1GB Memory DDR2 SDRAM DIMM PC2 6400 240 Pin 800Mhz NT1GT64U88D0BY AD
$6.57
24GB 3 X 8GB DDR3 1333 ECC RDIMM Memory For ASUS Z8 Server Z8NA D6 Z8NA D6C
24GB 3 X 8GB DDR3 1333 ECC RDIMM Memory For ASUS Z8 Server Z8NA D6 Z8NA D6C
$87.75
New Hynix 8GB 4X2GB DDR2 800MHz PC2 6400 Desktop DIMM Memory RAM 240pin
New Hynix 8GB 4X2GB DDR2 800MHz PC2 6400 Desktop DIMM Memory RAM 240pin
$27.81
VW Turbo 20T MK4 GTI STOCK MINT TBD11
VW Turbo 20T MK4 GTI STOCK MINT TBD11
$300.00
Hynix HYMP164U64CP6 Y5 AB C DDR2 512MB PC2 5300U Non ECC 667Mhz RAM Memory
Hynix HYMP164U64CP6 Y5 AB C DDR2 512MB PC2 5300U Non ECC 667Mhz RAM Memory
$7.49
Hynix PC2 6400 DDR2 800 1 GB DIMM 800 MHz PC2 6400 DDR2 Memory
Hynix PC2 6400 DDR2 800 1 GB DIMM 800 MHz PC2 6400 DDR2 Memory
$3.00

Recently Purchased Memory Ram:


hynix 8gb pc312800r ddr31600mhz 2rx4 ecc rdimm reg registered server ram, hynix 2 512mb 12800 ddr31600 dimm 1600 mhz pc312800 ddr3 sdram memory , ballistix sport lt 8gb 2 x 4gb ddr42400 cl16 memory bls2c4g4d240fsb, promos technology 1gb 2x512mb ram sticks 2x v916764k24qafwe4, ddr3 sodimm 3x2gb and 3x1gb lot, g skill f26400cl5s2gbnt ddr2 pc26400 800mhz desktop ram lot 4 x 2gb 8gb , hynix 2 gb sodimm ddr2 memory, patriot psd22g80026 ddr2 pc26400 800mhz desktop ram lot 4 x 2gb 8gb , elpida ebe21ue8aefa8ge ddr2 pc26400 pc26400u desktop ram lot 4 x 2gb 8gb, kingston lot 4 x 2gb 8gb ddr2 kvr800d2k24gr pc26400 800mhz low profile, micron mt16htf25664az ddr2 pc26400 pc26400u desktop ram lot 4 x 2gb 8gb, 8gb 4 units x 2gb 1333 mhz ddr3 240pin desktop memory hynix, transcend desktop memory 2g ddr2 800 dimm cl5 pn 5179333114 4 gb total, hp 16gb 8x 2gb 2rx4 ddr2 ecc server memory ram hp dell, samsung m470t2864qz3cf7 2gb 2x1gb 2rx16 pc26400s ddr2 sodimm laptop memory, 4gb set samsung 1gb x 4 pc25300u ddr2 desktop memory 4 pieces 1gb each , hynix 2gb 2 x 1gb 2rx16 pc26400s66612, 2gb ddr3pc310600s sodimm 204pin laptop ramm471b5773dho ch9, nvidia sli ready desktop ram 1gb pc26400 ocz2n800sr2gk, hynix 256mb pc25300s sodimm pc25300 ddr2 memory hymp532s64bp6y5, imac 2x2gb samsung pc38500 1066mhz 204 pin ddr3 sodimm memory 4gb, addon 8gb industry standard factory original rdimm, 5 pcs samsung m395t2953ez4ce66 1gb used as is memory ram, corsair vengeance 16gb 2 x 8gb 3200 mhz ddr4 desktop memory , nanya 256mb memory ram pc2100 ddr sdram 184 pin dimm nt256d64s88b0g75b, lot of 4 samsung 8gb 2rx8 pc312800s1113f3 sodimm laptop memory working, ballistix sport lt 8gb single ddr4 2666 mts pc421300 sr x8 sodimm 260 pin, addon 8gb factory original rdimm for hp 731761b21, addon 8gb factory original rdimm for hp 731761s21, addon 8gb factory original rdimm for ibm 46w0696, crucial 8gb ddr42400 sodimm ct8g4sfs824a, hynix 2 gb 1rx8 pc312800u 11 11 a1 hmt 325u6cfr8c pb no aa 1234 memory ram, gskill sniper 16gb 4x4gb ddr3 pc312800 memory f312800cl98gbsr2 125v, asint ddrii 1gb667 mhz ram memory ssy2128m8j6ee ddr2, valueram kingston tech server memory kvr266x72rc25512, kingston 16gb 1x16gb pc312800r server dimm kthpl31616g ram memory, laptop memory samsung m471b1g73db0yk0 8gb ddr3 2rx8 pc3l12800s 1112f3 , corsair vengeance rgb pro 16gb, sk hynix hma451s6afr8ntf 4gb 1rx8 pc42133p ddr4 laptop memory, 4gb 2x 2gb ddr3 laptop memory for toshiba c855ds5303 c855ds5315 c855s5206, 4gb ddr3 sodimm , crucial 4gb ddr4 2400 mhz pc419200 sodimm 260pin laptop memory ct4g4sfs824a, samsung 4gb 2rx8 pc310600s 1333mhz ddr3 ram m471b5273ch0 ch9, nanya 8gb 2x4gb 2rx8 pc312800u ddr31600 desktop memory ram nt4gc64b8hg0nfdi, nanya 1gb memory ddr2 sdram dimm pc26400 240pin 800mhz nt1gt64u88d0byad, 8gb ddr3l 1x 8gb laptop memory for toshiba satellite l55b l55tb l55b5133, hynix 256mb memory ram ddr sdram 184pin pc2100 computer 266mhz hymd232646a8haa, 8gb ddr3 2x 4gb laptop memory for toshiba satellite l875d l875ds7232 notebook, lot of 6 sticks of 128mb sdram, pc312800 8gb samsung sodimm 1600 mhz pc312800 ddr3 memory, elpida 4gb 2rx8 pc310600s ddr3 1333mhz 204pin sodimm ram laptop notebook memory, 64 mb pc133 sdram, crucial 2 x 8gb 16gb ddr3 sodimm 1600mhz pc312800 mac compatible memory ram, 16gb 2x8 gb pc3l12800s ddr31600 hp 693374001 laptop ram, actica super talent ddr31600mhz reg ecc 32gb 4x8gb, actica super talent ddr31600mhz reg ecc 32gb 4x8gb, actica super talent ddr31600mhz reg ecc 32gb 4x8gb, samsung memory 512mb 1rx4 pc23200r13310c1 x 4, 16 gb corsair dominator platinum ddr3 ram 2400 mhz c10, actica super talent ddr3 1600mhz reg ecc 32gb 4x8gb, promos 256mb ddr 333mhz pc2700u cl25 memory x 2, samsung 4gb 2rx8 ddr3 pc310600 1333mhz 240pin nonecc dimm desktop memory ram, actica super talent ddr31600mhz reg ecc 32gb 4x8gb, g skill ripjaws x 16gb 2 x 8gb 1866 mhz ddr3 240pin desktop memory

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