A single slot card can be 2 slots wide if it's under 6 3/4'' long. Windows finished installing. 80GHz, 2GB RAM, 80GB HD and licensed Windows 7 Home Premium. parts-quick (45,397) 99. sheets for Dell Precision's as mentioned. I have to have a small form factor (or similar) to fit under the counter in my business. 99. They all have 8 GB of PC2-6400 DDR2 800 Mhz RAM. Ram must be DDR2 PC2-8500Optiplex 755 DDR 2 Ram question. Or fastest delivery Jan 6 - 11. 99. The memory was twice replaced using new Dell. 2GB, 240-pin DIMM, DDR2 PC2-8500 memory module. Dell Optiplex 755 specs, deals, and users reviews. Select the department you want to search in. Dell Optiplex 755 Tower Computer, 2. 2 x 512Mb. 0GHz Intel Core 2 Duo Processor - 2GB Memory - Windows 7 Professional. 4GB kit (2GBx2), 240-pin DIMM, DDR2 PC2-8500 memory module. OptiPlex™ 755 system supports up to 8 GB of memory with a 64 bit operating system and up to 4 GB of memory with a 32 bit operating system. 1. Dell OptiPlex 7000 7010 Desktop Computer - Intel Core i5 13th Gen i5-13500 Tetradeca-core (14 Core) 2. upgrading RAM on OptiPlex 755 with 0GM819 motherboard. . Dell Optiplex 755 Memory; Dell Optiplex 760 Memory; Dell Optiplex 780 Memory; Dell Optiplex Gx520 Memory; Dell Optiplex Gx620 Memory;. To replace Optiplex 755 SFF 160G HDD by a 500G HDD you must clone the 160G HDD to the 500G HDD. Shop Amazon for A-Tech 8GB (4X 2GB) Max Memory RAM Kit for Dell OptiPlex 755, 745, 740, (MT, DT, SFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Upgrade and find millions of items, delivered faster than ever. Beyond just RAID support, the system offers proactive security features from vPro, and advanced remote management capabilities. Refurbished Dell Optiplex 755 With Windows 7 Home Premium, Intel Dual Core Processor 1. GPU's cost a lot of money now days so try to find one with AT LEAST 2GB Vram. 32Gb. JSM Computers StoreVisit Store. Hello, I am wanting to buy a graphics card for my Optiplex 755. Work in comfort and in style with a sleek new design, built-in intelligent collaboration & security features, plus a pop-up EMZA webcam with. CIRCUIT BOARD 2. Boost GPU Frequency. Buy system specific Dell OptiPlex 755 DT/MT/SFF Desktop Memory/RAM and SSD upgrades from KingstonMemoryShop. #1. Fast & Free shipping on many items!2GB 240-pin PC2-5300 DDR2-667 non-ECC non-Registered DIMM. and I want to upgrade my RAM in case of use optimally FSB (MHz). Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. But your money would be better spent on a newer model that supports current ram and hardware as well as coming with windows 10. . The systems typically contain Intel CPUs, beginning with Celeron and Pentium and currently with the Core microarchitecture. It has an Intel Core 2 Duo 3. 89. Try connecting another PSU for testing. Hi, I have Dell Optiplex 755 DT model. $8. Unsolved. The original SATA protocol was designed to maximize the performance of platter (physical spinning) hard drives. A 30w GT 1030 GDDR5 is commonly used in this DT form factor. it can be the difference between DDR2-667, and DDR2-800. 775 DDR2 OptiPlex 755 chipset: INTEL Q35 EXPRESS memory slots: 4x DDR2 expansion slots: PCI-E x16 , PCI back panel: LPT , COM , VGA , 6x USB , RJ-45 (LAN) , AUDIO (2x mini-jack) i/o shield: NOT INCLUDED Satisfaction guarantee Our products are carefully packed and insured for the. version 1. Low Cost Delivery Low Prices 100% Safe & SecureThe Dell OptiPlex 755 offers enhanced management and control with Intel ® vPro TM processor technology, allowing IT staff excellent flexibility, high efficiency and reduced desk-side troubleshooting. Buy It Now. OptiPlex 9020 (MT, SFF) 4. Beyond just RAID support, the system offers proactive security features from vPro, and advanced remote management capabilities. Unfortunately, the BIOS does not recognize the new. or Best Offer. Optiplex 755 DDR2 800 RAM upgrade options / help. 3 out of 5 stars (36) $195. Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. CPU PROCESSOR 0. If I just move my old hard drive, RAM, video card and tel-fax modem card into the replacement Opti 755, will it work? I did this once before, six years ago, and I recall that this involves msoobe. I wonder what works best for my motherboard. Graphics. $ 140. Both dual-channel and single-channel configurations are supported . - With Macrium reflect clone. I rebooted the PC. Get fast shipping and top-rated customer service. Optiplex 755, ram. Caps safe. 25-inch drive bay 3 3. DELL 0DR845 s. What I would do, as budget allows is: First, upgrade the RAM. Replace the Hard Drive. Intel Dual Core Processor. Dell OptiPlex 755 Tower PC Intel Core 2 Duo 2. OptiPlex 3090 Micro. 02-10-2008 13:00 PM. Publish date: 20 APR 2008. Visit the Amazon Renewed Store. Tengo un Dell Optiplex 755 con varios problemas entre los que están el que no me reconoce 2 slots DDR, al apagar no se termina de apagar, se queda encendido, y al enchufar tengo que darle rápidamen. The memory was twice replaced using new Dell. Intel® Q965 (ICH8) Express Chipset. 81. Front and Back View. Buy system specific Dell Optiplex 755 USFF/Ultra Small Form Factor Desktop Memory/RAM and SSD/Hard Drive upgrades from MemoryCow. (hdd can upgrade to ssd. OptiPlex form factors. Crucial Part Number: CT751693. also PCIe can be updated from 2. 5-inch internal SSD • SATA 6. This means modules with chips on both sides. Free shipping. Only one thing changes RAM speed. Optiplex 5000 Micro. 99 –DELL OPTIPLEX 755 SFF, CORE 2 DUO 2. Only 4 left in stock - order soon. . 2 V. I understand Windows XP cannot utilize the full 4 gigs of RAM which is fine with me. The only way we got it to install was by turning "OS Install" option on. 80. 4 Gb/s) of bandwidth and 8 Gb memory addressability for faster system. . Buy A-Tech 4GB (2 x 2GB) Memory RAM Kit for Dell OptiPlex 960, 760, 755, 745, 740, 360, 330, 160, (MT, DT, SFF, USFF) - DDR2 800MHz PC2-6400 Non-ECC DIMM Modules: Memory - Amazon. This is just a guess though I am not Dell engineering and I don't have a Cpu to test. RESULTS Amazon's Choicefor dell optiplex 755 ram 8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory 4. 000000] BIOS-e820: 0000000000000000 - 000000000009ec00 (usable) [ 0. Data Security and Recovery with RAID 1 support ensures real time redundancy for data - helping to keep your business. $1. F886J 2. Dell Optiplex 755 SFF Intel Pentium Dual E2160 1. A seagate 500GB HDD and (originally) 4GB of Samsung PC2-5300U DDR2 ram in a 4x1 configuration. POWER ADAPTER 0. Memory speed issue after Optiplex 755 Memory Upgrade. Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Ultra Small Form Factor) - FREE US Delivery. PNY 2GB DDR2. Free shipping. Buy some contact cleaner and spray the RAM contacts as these desktops love to complain about RAM fault when RAM contacts go bad. 1 for the graphics on a newer card which you’ve overclocked. BTW, some will tell you the page file will wear your drive faster, technically correct, practically irrelevant. if your looking at one of these i would reccomend them because they blend into everyday use and tasks really. Hold. Publish date: 20 APR 2008. Free shipping! | Black Friday deals start now! search; United States. Browse CommunityDell OptiPlex 755 Memory: Refine Results. 25. View PDF. El equipo OptiPlex 755 soporta memorias DDR2 SDRAM de 667 o 800 MHz, para que el ordenador reconozca los 8 GB de memoria, es necesario que el equipo tenga instalado un sistema operativo que trabaje a 64 bits. FREE delivery Mon, Nov 13 . 69 (3 used & new offers) How much memory does the Dell Optiplex 755 Desktop Computer take? You can upgrade your Dell Optiplex 755 Desktop Computer to up to a maximum memory capacity of 16GB Memory. (hdd can upgrade to ssd. MOUSE BUTTON 0. Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. 97Shop Amazon for A-Tech 8GB KIT (4 x 2GB) for Dell Optiplex 740 745c 755 DT/MT/SFF 760 DT/MT/SFF 760 Series (Desktop Mini Tower and Small Form Factor) DIMM DDR2 Non-ECC PC2-6400 800MHz RAM Memory and find millions of items, delivered faster than ever. I replaced it with 8 GB of Kingston memory (KVR800D2N6). Solution. william p. OptiPlex Micro All-in-One Stand - MFS22 Adjustable, compact stand for your micro creates a clean, open workspace with minimal cables. USB, Ethernet, serial, parallel, VGA ports. Fast & Free shipping on many items! Skip to main content. CPU: I'd reccomend at least a core i3 if not a i5. 00 mm (11. or Best Offer. Dell OptiPlex 755 SFF Core 2 Duo 4GB RAM 500GB HDD Windows XP Pro SP3 32bit. The USFF chassis does not. com. The newer the game or program intensity, the more negligible the OC will be. The CPU-Z program would tell you how fast it is or isn't running. 10 A11 Processor: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2. battery socket (BATTERY) processor power connector (12VPOWER) PCI Express x16 connector (SLOT1) memory module connectors (DIMM_1, PCI connector (SLOT2) DIMM_2, DIMM_3, DIMM_4) password jumper. Or fastest delivery Tomorrow, Oct 19. Can anybody clearify this Statement from the product brief: "Delivers up to 12. I realize this light pattern indicates the system has detected a memory failure, though I have replaced the two DDR2 memory modules three times over the past year. MD5:Set up the Ubuntu Install. Buy Memory RAM Upgrades for your Dell Optiplex 755 [Mini-Tower] - 100% Compatibility Guaranteed. A built up 755 would have a Q9650, 8 GB DDR2-800 RAM (low density x64)and a ZOTAC MINI GTX 1050Ti 4GB GPU that runs off of the MB PCIe slot. United States; United. com FREE DELIVERY possible on eligible purchasesA-Tech 8GB (4X 2GB) Max Memory RAM Kit for Dell OptiPlex 755, 745, 740, (MT, DT, SFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Upgrade. OptiPlex 160L. 1 with 8GB. 69 (3 used & new offers) Overall Pick To get the max out of my 755 MT: CPU = C2Q Q9650; RAM = 8GB; OS is on a Crucial SSD. Mientras escribíamos me fije en la pagina de intel, y es concreto, la 755, por. 5-inch 7mm (with 9. The MT case can take full height cards, The DT and SFF require low profile. 0 out of 5 stars 3 $11. In Stock Best Buy Only. You can use the Cursor or Arrow keys to navigate the menu and select your choice. Part number: PO208449 (Slot 2 and 3) Crucial Technology PC2-6400 (400 MHz). Diagnostic lights 3,4 indicate a RAM problem. Refine Results : Dell OptiPlex 755 Splitter Monitor Cable DVI-I to DVI-I VGA Split Cable Adapter - 48CFM: $4. com: Optiplex 755 Ram 1-16 of 105 results for "optiplex 755 ram" Results Amazon's Choice 8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory 128 $3162 FREE delivery Tue, Jul 11 Or fastest delivery Jul 7 - 10 More Buying Choices $29. Find low everyday prices and buy online for delivery or in-store pick-up. Try the Hard Drive data cable in a different slot. The 745 appears to use either the Q963 or Q965 chipset, while 755 uses either the G31 or G33. 00. $8. upgrading RAM on OptiPlex 755 with 0GM819 motherboard. 13GHz Core2 Duo Processor (1066MHz Front Side Bus), 3GB DDR2 250GB SATA Hard Drive, Crystal Clear , DVD/CDRW, Intregrated. normally on a OptiPlex 755 (and you need to confirm this by looking inside the case) the system has 4 slots for ram, ands 8GB is the highest in 99% of cases for 775 CPUs' thus DDR-800/667 being the two possible speeds used on the said motherboard. ) blow the slot out first with can-o-air or shop air. I bought a seller refurbished 790 DT off of eBay to run the Win7 32-bit HDD the 755 used to have. Fast & Free. Each memory slot can hold DDR2 PC2-8500, DDR2 PC2-6400, DDR2 PC2-5300 with a maximum of 4GB kit (2GBx2) per slot. £20. Currently unavailable. exe. These are the Quads we validated -. Enter model or choose from the list below. Sep 20, 2011. I'm running one in my. I currently have a optiplex 755 desktop with 2. 2GB PC2-6400 DDR2 Desktop Memory RAM For Dell OptiPlex 740 745 755 760 760D 960. Search Newegg. 33GHz. Get the best deals on Dell Optiplex 755 Motherboard and find everything you'll need to improve your home office setup at eBay. OptiPlex 755 User's Guide -. 66GHZ CPU and 4GB RAM. 8 Ghz, 2 GB RAM, DVD. Options:160 GB HDD Hard Drive Windows with XP Pro SP2 or Vista Business. 78 shipping estimate. $14. Does Optiplex 755 suport one of those Xeon's: X3210, 3050 , or is there any unoficiall bios which supports it. Thanks!I got an Optiplex 755, and lately, I got an 8GB ram but after one week when I turned the pc on I notice that the pc is on but the screen off; however I tried to replug in the rams its worked but by taking away two rams out of 4, and I knows that 2 out of 4 ram plugin are working, so how can I fix this to use all rams plugins. It can still run Windows 10. Optiplex 755 can take 16GB as 4GB modules. Y255C DELL Optiplex 755 Motherboard Desktop. This fault usually occurs about once per week. User Guide - Dell Search OptiPlex 755 Support Information Find articles, manuals and more to help support your product. Free shipping. 00GHZ DUAL CORE DTP 80GB 2048MB. Buy A-Tech 4GB (2X 2GB) Memory RAM Kit for Dell OptiPlex 755, 745, 740, GX620, GX520, 360, 330, 160, FX160, (MT, DT, SFF, USFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Modules: Memory - Amazon. 5" Internal Hard Drive. FREE delivery Aug 9 - 11 . 89. 24. Data Security and Recovery with RAID 1 support ensures real time redundancy for data - helping to keep your business. 10 A21 Processor: Intel(R) Core(TM)2 Duo CPU E8200 @ 2. com for ram for optiplex 745. From the Optiplex 755 Tech Guide, 800MHz is the max RAM speed for it. Card name: NVIDIA GeForce GT 610 Manufacturer: NVIDIA Select the department you want to search in. Dell Optiplex 740 Memory; Dell Optiplex 755 Memory; Dell Optiplex 760 Memory; Dell Optiplex 780 Memory; Dell Optiplex Gx520 Memory; Dell Optiplex Gx620 Memory; Dell Studio 1555 Ram; Dell T110 Memory In Computer Memory (Ram) Dell T3400 Memory; Dell Vostro 200 Memory; Dell Xps M1530 Ram; Gateway Dx Indiana Computer Memory. The characteristics of my PC are: - 240 GB SSD Hard Drive - 4GB DDR2 800 RPM RAM - Intel Core 2 Duo E6550 processor (2. Cleaning slots does not make non compatible ram suddenly compatible. com. I have viewed YouTube videos and put them up to HD resolution and the videos look fine. 0 5. The Dell Optiplex 755 is aimed at and optimized for business with a blend of performance and features. 3. 0Ghz. com: Dell OptiPlex 755 MEMORY 1-16 of 123 results for "Dell OptiPlex 755 MEMORY" Results Amazon's Choice 8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory 129 $3162 Save 6% Details FREE delivery Mon, Sep 11 Or fastest delivery Sep 7 - 8 More Buying Choices $29. 9. However they have more RAM 4 GB and a HD5450 video card as the Intel onboard card is quite a low end graphics solution. 1GB RAM Upgrade for HP Pavilion Slimline s7627c, s7620nl, s7320n, s7400n A99. OptiPlex. They are doing everything they can to force you to go online and use a microsoft account. 2GB Memory RAM for Dell OptiPlex Optiplex 755 MiniTower, Optiplex 755 Ultra SFF, 620 (Ultra SFF), 755 Ultra-Small form Factor, 755 Energy Smart 240pin PC2-5300 667MHz DDR2 DIMM Black Diamond Memory. OptiPlex Desktop Computers - OptiPlex desktops & all-in-ones offer space-saving features, advanced security. The Dell OptiPlex 755's 2GB of memory and dual-core E4500 processor helped it on the SYSmark 2007 Preview benchmark tests. I want to extend the memory to maximum. com. My desktop is an Optiplex 755 and it has 4 gigs of memory and running on Windows XP. #5. 99. 95. There are 4 different versions of the OptiPlex 755. Si va a mezclar tipos de memoria, ejemplo memorias de 667 MHz con Memorias de 800Mhz las memorias trabajaran a la velocidad del módulo más lento. Jul 10, 2017. Typical of Dell business machines, they try to keep things as consistent as possible so that moving to a new desktop line doesn't make the. Corsair Vengeance RGB Pro 32GB (2 x 16GB) DDR4 3600MHz Desktop Memory (CMW32GX4M2D3600C18) (1633 Reviews) $109. 1GB DIMM PC2-5300 DDR2 667MHz Desktop Memory RAM for Dell Optiplex 755 and other. It's on the list here. Home. This also assumes a 64-bit operating system. com. 0 to 2. 99. 45 shipping. 2 GB DDR2 RAM memory. MP627 2. Good day Sirs, I have Mini Tower OptiPlex 755 with 0GM819 motherboard. Page 22 Dell™ optiplex™ 755 technical guiDe coMMunications - nEtwork aDaptEr (nic), cont. Refurbished OptiPlex 755 Desktop - Intel Core 2 Duo - 2GB Memory - 160GB Hard Drive. 5GB Ram Core 2 Duo. At the technical guide (thank's for link to SpeedStep) I didn't find any information about supported max bus clock (MHz) of RAM. core 2 duo cpu is old having only 2 cores slower than 1st gen i3. Only 1 left! Dell OptiPlex 755 SFF Desktop PC C2D 4GB DDR2 160GB HD DVD-ROM - NO OS. Here is the situation: Optiplex 755 with Core 2 Duo E8400 CPU, Processor ID 10676. 241. Guaranteed-compatible with the Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) Standard. At MemoryC we supply Dell Optiplex Optiplex 755 desktop/server memory upgrades that are guaranteed to work in your system! Upgrading your Dell Optiplex desktop/server memory will give you an additional performance boost and make memory intensive applications work smoother. Single slot cards with 1 fan can fit. If an item exceeds storage capacity. Personally I would go with ddr3 because the 8 gb sticks are less expensive than ddr2 8 gb (if they even exist) Also they are faster. Opens in a new window or tab. Type: DDR1 SDRAM. 8 Gb/s (DDR2 800 dual 6. To find out what is causing the No Boot issue, perform the troubleshooting steps below: Ensure that the Hard Drive is recognized in the BIOS. de memoria Ram. 99 New. Mi pregunta es ¿Puedo colocar en una de las ranuras libres una memoria ram kingston kvr8002N6 de 2 GB a 1. ) Rear height 290. Even if the BIOS update is from 2007 like mine. 0 to 2. I really don't know that you'll notice a difference in RAM speed between 667MHz and 800MHz simply using the PC. The probability of being PSU vs MOBO is 50/50. 11 Posts. I'm typing this up on an HP nc6000 laptop with 1gb ram on a 1. 0 GB Windows XP Home, Intel Graphics Media Accelerator 3100 32 MB DDR 256 MB (shared). Crucial Memory and SSD upgrades - 100% Compatibility Guaranteed for Dell OptiPlex 745 Series (Desktop Mini-Tower and Small Form Factor) - FREE US Delivery. Ultra-configurable, Dell Optiplex 755 specs include an Intel Core Duo processor running from 2GHZ to 2. I have been told it could be RAM or the memory on the video card. N650J 2. 60 mm (3. 04. 30,340. 2 Posts. Meanwhile, 2GB of DDR2 RAM is pre-installed on the motherboard, later you can upgrade up to 4GB of RAM. 00 $ 170. 90. 1GB Memory Upgrade for Dell OptiPlex 755 DDR2 PC2-5300 667MHz Desktop Non-ECC DIMM RAM (PARTS-QUICK Brand) $699. Business. At the technical guide (thank's for link to SpeedStep) I didn't find any information about supported max bus clock (MHz) of RAM. O. 95. 36 product ratings - Samsung 256MB SO-DIMM 333 MHz PC-2700 DDR Memory RAM (PC2700S-25331) 200-PIN. Yes, crucial brand ram from genuine micron factories is about the only memory that will ever work in a dell computer. While the 755 can run fast. Free shipping! | Black Friday deals start now! search; United States. My Optiplex 755 was delivered with 2GB memory (2 x 1GB, non-ECC, 667MHz, DDR2 SDRAM), and two empty slots. . C $27. Dell Optiplex 755 INTEL Core 2 Duo 2300MHz 80Gig Serial ATA HDD 4096mb DDR2 Memory DVD ROM Genuine Windows 7 Professional 64 Bit Desktop PC Computer. and I want to upgrade my RAM in case of use optimally FSB (MHz). (30) 30 product ratings - Dell OptiPlex 755 SFF Motherboard PU052 E6550 CPU 2. Optiplex 745. #2. 0. 99. The specs for Optiplex 755 Desktop comes in these configurations with a retail price tag. if your looking at one of these i would reccomend them because they blend into everyday use and tasks. 1, or 2. I was told by a freind ot pick up some Hyper X fury ram howver, im not sure if it would be compatible and what modules i should get i have 8gb in right now, in 2 x 4 sticks and i hav e2 slots left i have been told that the max speed. This video shows St. Buy 4GB kit (2GBx2) Upgrade for a Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) System (DDR2 PC2-6400, Non-ECC, ): Memory - Amazon. 8 V. Dell Optiplex 9020 USFF Desktop Computer with Intel i5-4570S Upto 3. Thanks for your help so far, I really appreciate it. My current specifications are as follows: CPU - Intel Core2 Duo E6550 @ 2. HOWEVER you need AT LEAST a Pentium D 915 dual core cpu in order to run 64 bit versions. The Dell Optiplex 755 SFF originally comes with 4 gigs of RAM, 1 gig stick in each slot, but mine only has 3 since it was a gift. $ 119. 6 out of 5 stars(126) $31. 0 5 Dell™ optiplex™ 755 technical guiDe 5 front view 1 5. 66GHZ CPU and 4GB RAM. 99. I would like to upgrade to 8 GB by. 000000] BIOS-provided physical RAM map: [ 0. 35 V operation for memory. 10 A21 Processor: Intel(R) Core(TM)2 Duo CPU E8200 @ 2. Processor A 13th Gen i5-13500T OS Windows 11 Pro Memory 16 GB DDR4 Storage 256 GB SSD Estimated Value $1,247. A empresa acaba de adquirir dois Optiplex 755 Core 2 Quad com 4 Giga de Ram e HD 150 Giga Raid 1, porém esta sendo disponibilizada para. 23 gigs of RAM. 0 connectors (2) 5 LAN indicator light 6 diagnostic lights 7 power button 8 power light 9 hard drive activity light 10 headphone connector 11 microphone connector Mini towEr coMputEr (Mt) viEw back view 1 card. sys and make sure that this file is on the SSD with at least 1. United States; United. 22-04-2013 09:00 AM. User Guide - DellMy build so far is an Optiplex 755 SFF with a lovely E8600 core 2 duo CPU. Part number: ct25664aa800. Specs of Dell Optiplex 755 Motherboard: Number of DIMM Slots: 4: Ports: Serial, USB 2. Crucial probably tested it. Brand. Small Business. Buy A-Tech 4GB (2X 2GB) Memory RAM Kit for Dell OptiPlex 755, 745, 740, GX620, GX520, 360, 330, 160, FX160, (MT, DT, SFF, USFF) - DDR2 667MHz PC2-5300. Opens in a new window or tab. The memory speeds supported include 667 and 800 MHz DDR2 memory.