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#1 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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4GBs RAM, 32/64bit OSs
This post is intended to be a handy quick reference to address common questions concerning Windows operating systems and large amounts of installed memory. If anyone would like to add to it, make a correction, or a suggestion, just post or PM me and I will edit it. Common Question: "I installed four gigs of ram in my computer but Windows says I only have 3.12!" Cause: All 32bit processors and OSs support 32bits of physical address space which allows software to address a total of 4GB. However, your BIOS reserves space for your graphics card and other peripherals, as does (sometimes) some of your drivers. Why? “This is because some physical address space must be reserved as I/O regions for memory mapped peripherals. These I/O regions are allocated between the 3 GB physical address and the 4 GB upper physical address limit. Physical memory addresses that are mapped to these I/O regions cannot be used to address physical system memory. These addresses also cannot be used to prevent the operating system from using some physical memory that would ordinarily be accessed between the 3GB physical address and the 4GB upper physical address limit. The size of these I/O regions varies from system to system because they determine the type and configuration of the system’s peripherals.” MS Link Solution 1: If your processor supports x64 extensions, here’s a list, then the technically superior method is to load a 64bit version of the OS you want to use. Sometimes this incurs a small upgrade fee from MS, sometimes it involves buying a new OS outright. Depending on which version of Windows you buy, you can address up to 128GB of RAM. Solution 2: Use PAE Mode. PAE is another way to address more than 4GBs or RAM; up to 128GBs in a 32bit environment. This method is limited to select versions of Windows Server only. Note: Vista SP1 will report how much memory is physically installed on the machine, as opposed to how much is available to the OS. MS Link Note: Systems with more than 4GBs of ram cannot be put into Hibernation. MS Link Note: 32bit versions of Windows allow only 2GB of memory per process. However, some applications can take advantage of a feature available in select versions of Windows which allows the use of 3GB of RAM to be allocated to the user-mode process. This feature can also be utilized to allot 4GBs of ram to a 32bit processs within a 64bit environment. MS Link, MS Link Note: 16bit programs will NOT work in a 64bit environment. Keep in mind that the installer for some 32bit applications are 16bit. Note: If you have 4GBs of RAM and a 64-bit version of windows but it still reports 3.xx, then run msconfig from the Run prompt. Within the System Configuration Utility, navigate to the 'BOOT.INI' tab, click the 'Advanced Options' button. Make sure the '/MAXMEM=' option isn't checked. If it is checked, uncheck it and reboot.
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Q9650 @ 4ghz, ASUS P5KP35 300GB V-Raptor, 1.0TB CaviarB64MB eVGA GTX285, 4GB 1069mhz Dominator Enermax Infiniti 720W, Dell 2408wfp Win7Ux64, NZXT Adamas Case Heat Have 4GBs of RAM and Windows reports only 3.xx? Read the Sticky!
Last edited by nightelph; 01-31-10 at 09:33 PM. |
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#2 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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Thread updates: 1.31.10: Updated broken MS link.
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Q9650 @ 4ghz, ASUS P5KP35 300GB V-Raptor, 1.0TB CaviarB64MB eVGA GTX285, 4GB 1069mhz Dominator Enermax Infiniti 720W, Dell 2408wfp Win7Ux64, NZXT Adamas Case Heat Have 4GBs of RAM and Windows reports only 3.xx? Read the Sticky!
Last edited by nightelph; 02-05-10 at 10:02 PM. |
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#3 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Rest In Peace |
Sticky Vote!! Very nice write up Nightelph
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No Rig currently :( New Rig to be built in coming months......i7? Maybe :) "I Reject Your Reality, and Substitute My Own" E8400(CO) @ 4.2Ghz with 1.312v/4.5Ghz with 1.38v - Retired Heatware[/SIZE] |
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#4 |
![]() ![]() ![]() Member Join Date: May 2007
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nice thread!!! lots of useful info!!!
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Windows 7 Ultimate x64 Cooler Master HAF 932 Intel i5 750 @ 3.8Ghz LC Fuzion V2 ASUS P7P55D Pro 2Gx2 GSKILL F3-16000CL9D-4GBRH eVGA GTX 470 SC w/Koolance Full Block Corsair VX 550 Dell 2209WA & 2709W Razer Lycosa & Cooperhead |
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#5 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() Member |
Stickage ...
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HEAT Motherboard -------- BIOSTAR TPower I45 CPU ------------------- Intel E8600 @ 4GHz Memory -------------- 4GB Corsair Dominator DDR2 1066 Cooling --------------- Thermalright Ultra 120 Extreme HDDs ----------------- Western Digital Velociraptor 300GB 10k RPM Graphics Card ------- MSI HD4870 OC Edition Soundcard ----------- Creative X-Fi Xtremegamer Case ------------------ Antec Nine Hundered Power Supply ------- OCZ ModXStream Pro 600W OS -------------------- Win 7 Pro x64, Mint 10 x64 |
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#6 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Low Profile Senior Join Date: Jul 2006
Location: Indonesia
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. @MOD: STICKY PLEASE ! . |
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#7 |
![]() ![]() Registered Join Date: Jan 2008
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Very useful info. Sticky! ![]()
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Sorry sig. |
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#8 |
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THANK YOU!! bump until stickied!!!!!
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|Rig|Q9400 @ 3Ghz, 4G | 5770 | various Hd's ¸,ø¤°`°¤ø,¸© The trouble with life is there’s no background music ©¸,ø¤°`°¤ø,¸ ¸,ø¤°`°¤ø,¸© Life isnt short, you're just dead for too long©¸,ø¤°`°¤ø,¸ |
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#9 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Senior Member Join Date: Nov 2005
Location: Concord, NC
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Gooey...oh wait...thats not it...ummm...oh yeah...STICKY!!!!
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QUADINATOR: ES Q9550 E0 @ 4GHz 1.256v TRUE MaxIIForm 4GB-Ballistix @ 1132MHz TT Armor
GTX280 @ 729/1458/2520 1.175v/0.85v AC-AX Xplosion-DTS 300GB-VR PCP&C750 Hanns-G 27.5" 1920x1200LCD Z5500-5.1 Saitek-Eclipse G9 Logitech G27 Wheel + Microsim Racing Pod Vantage 'X'-6,727 SPEED-QUEEN: E5200 M0 @ 3.84GHz 1.352v CM-Hyper212 P5K-Prem 4GB-Ballistix @ 1GHz Antec900 HD4850 @ 800/2300 1.3v/1.05v HR03GT 2x250GB-WD RAID0+1 Zeus560W Acer 22" 1680x1050 Stereo-2.0 ***HEAT*** GAMING HTPC: E5200 M0 @ 3.6GHz 1.344v Geminii-S P5Q-EM 4GB-OCZ-Plat @ 900MHz AntecNSK2480 8800GTS @ 648/1620/2200 1.0v 8800GTstockcooler 320GB-WD Blue AntecEW380W Sanyo PLV-Z4 720P Projector 95" 6.1 DTS-ES 110W/ch unRAID FILE SERVER: E5200 M0 @ 2GHz 0.856v MSIP43Neo3-F 4GB-Corsair @ 800MHz CM590 PCIgfxCard 2x2TB Samsung 4x1TB-WDGreen 2x1TB-WDBlack 4x640GB-WDAAKS [10TB] Antec550W |
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#10 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() Member Join Date: Jan 2005
Location: The MotherShip
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I know the posts in the memory forum will go down but I have answered at least 10 of thses threads. Please Sticky This!!!
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Benching: 980X "Behold, I am Funkadelic. I am not of your world. But fear me not, I will do you no harm. Loan me your funky mind and I shall play with it. For nothing is good unless you play with it. And all that is good, is nasty!" ("What Is Soul," Funkadelic, 1969) |
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#11 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Offshore Moderator Join Date: Nov 2001
Location: On OCForums
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Glue applied. ![]()
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QX9650@4000, X38-DQ6 mobo, Fuzion v.1 w/dual fan heater core+PA120.3+260GTX/MCW60R2,Iwaki MD20RZ(T), Yate Loon fans Q6600@3600,Foxconn Mars P35, GTZ, D4 w/MCR220-QP Res rad, Swiftech fans 940BE@3813, M3A79-T Dlx, Fuzion v.1, MCP355 w/XSPC res top, PA160, Panaflo L1BX Q6600@3700, P5Q-Pro, HK3.0+8800GTS 512/MCW60 w/RX360 rad, MCP355 w/XSPC top, YL D12SL led fans E5200@3830, P35-DS3L, mobo dead, RIP E6750@3600, P35-DS3R, mobo dead, RIP Asus N51Vn, T9600 processor All running Seti or Rosetta My heatware In from the rig |
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#12 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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Thanks Mudd. ![]() |
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#13 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Offshore Moderator Join Date: Nov 2001
Location: On OCForums
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Yeah, this was a good idea that needed to be done. There are so many threads asking "Why doesn't my computer see all my ram" being posted all the time. Thanks for making a nice short sweet post explaining it all. ![]()
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QX9650@4000, X38-DQ6 mobo, Fuzion v.1 w/dual fan heater core+PA120.3+260GTX/MCW60R2,Iwaki MD20RZ(T), Yate Loon fans Q6600@3600,Foxconn Mars P35, GTZ, D4 w/MCR220-QP Res rad, Swiftech fans 940BE@3813, M3A79-T Dlx, Fuzion v.1, MCP355 w/XSPC res top, PA160, Panaflo L1BX Q6600@3700, P5Q-Pro, HK3.0+8800GTS 512/MCW60 w/RX360 rad, MCP355 w/XSPC top, YL D12SL led fans E5200@3830, P35-DS3L, mobo dead, RIP E6750@3600, P35-DS3R, mobo dead, RIP Asus N51Vn, T9600 processor All running Seti or Rosetta My heatware In from the rig |
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#14 |
![]() ![]() ![]() ![]() ![]() Mobo Cooking Member Join Date: Jan 2008
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Yup, wtg nightelph
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Q6600 @ 3.6 Ghz 1.45V TRUE 2x2 GB @ 1066 Mhz GSkill 5-5-5-15 @ 1.9 V MSI GTX 260 (216 cores) Maximus Formula II Q6600 @ 3.2 Ghz 1.35V AC freezer pro 7 4 GB Patriot 800 Mhz DDR2 5-5-5-16 1.92V ATI x1950 256MB D975xbx2 My heatware |
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#15 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Jul 2004
Location: University of Southern Mississippi
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You REALLY need to mention in there that true PAE support with Microsoft operating systems is only available on Server editions. There is NO WAY TO ENABLE TRUE PAE FOR >4GB MEMORY SUPPORT ON NON-SERVER WINDOWS.
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MSI 890GXM-G65 - X6 1055T - 4GiB 10700 - 5850 1GiB - X-Fi Prelude - Gentoo amd64 - HX520 Asus X83V (PM45+ICH9) - C2D T5800 - 4GiB 6400 - 9300m GS 512MiB - ALC663 - Gentoo amd64 Heatware [GB ≠ GiB] [MB ≠ MiB] [kB ≠ kiB] [1000 ≠ 1024] [Kelvin ≠ kilo] [Byte ≠ bit] "Apparently, Plaintiff believes that he could sue an egg company for fraud for labeling a carton of 12 eggs a “dozen,” because some bakers would view a “dozen” as including 13 items." - Western Digital 2006 Folding for Ashley O'Rear petteyg359 has 2x e |
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#16 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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According to the MS Link I posted; "The information in this article applies to Windows 2000, Windows XP Professional, Windows Server 2003, and later versions of these operating systems." - MS I do agree that its is way more practical to use PAE on Server OSs than desktop ones. Can you explain technically why 'true pae' cannot be enable on a desktop os?
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Q9650 @ 4ghz, ASUS P5KP35 300GB V-Raptor, 1.0TB CaviarB64MB eVGA GTX285, 4GB 1069mhz Dominator Enermax Infiniti 720W, Dell 2408wfp Win7Ux64, NZXT Adamas Case Heat Have 4GBs of RAM and Windows reports only 3.xx? Read the Sticky!
Last edited by nightelph; 11-14-08 at 08:43 AM. |
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#17 | |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Jul 2004
Location: University of Southern Mississippi
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The PAE available on non-server/enterprise editions is a limited subset to allow DEP to function. It does NOT allow access to >4GB memory. Did you read to the bottom of the page? Quote:
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MSI 890GXM-G65 - X6 1055T - 4GiB 10700 - 5850 1GiB - X-Fi Prelude - Gentoo amd64 - HX520 Asus X83V (PM45+ICH9) - C2D T5800 - 4GiB 6400 - 9300m GS 512MiB - ALC663 - Gentoo amd64 Heatware [GB ≠ GiB] [MB ≠ MiB] [kB ≠ kiB] [1000 ≠ 1024] [Kelvin ≠ kilo] [Byte ≠ bit] "Apparently, Plaintiff believes that he could sue an egg company for fraud for labeling a carton of 12 eggs a “dozen,” because some bakers would view a “dozen” as including 13 items." - Western Digital 2006 Folding for Ashley O'Rear petteyg359 has 2x e |
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#18 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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Busted. That chart isn't on my printout that I read. I'll update the main post. Thanks for the correction. |
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#19 | |
![]() ![]() ![]() Member Join Date: Dec 2007
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Quote:
LMA aware apps can utilize up to 3Gb with the /3Gb switch. 32-bit LMA apps in a 64-bit environment will use 4Gb. |
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#20 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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^ Updated, thank you. |
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#21 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() High Speed Senior |
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-=The Gamer=-
EVGA X58 | i7 920 C0 (3841A578) @ 3.67Ghz w/ 1.14375V | 40C Idle / 66C Load (LinX) 6 Gig G.Skill PC3-12800 8-8-8-21 @ 1632Mhz w/ 1.6V | TR Ultra eXtreme 120 w/ 2 Fans EVGA GTX285 @ 702/1584/1404 | 36C Idle / 72C Load | 2x 80Gig Intel G2 SSD's Modified Antec P180 Case | SilverStone DA750 | Dell 2405FPW 24" Screen -=The Server=- DFI LT LP X38-T2R | E1400 @ 2.0Ghz w/ 1.275V | 32C Idle / 48C Load (Normal Load) 2 Gig G.Skill PC2-8500 5-5-5-15 @ 800Mhz w/ 1.8V | Stock E8400 Heatsink w/ MX-2 ATI 4350 | 1x WD 640Gig | 2x WD Green 1TB | WD 160Gig External Offsite Backup SilverStone Black LC10B-E Media Center | Corsair CMPSU-400CX Code of the Week: Oni Likes It In The Cartilage | Heat |
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#22 |
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New Member Join Date: Jun 2009
Location: Russia, Chelyabinsk
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спасибо за инфо Translation: "Thanks for info" - IMOG Forum Moderator/Translator/Poop pickerupper Last edited by I.M.O.G.; 06-09-09 at 04:14 PM. |
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#23 |
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Yay, we needed one of these.
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HeatWare <--Coretemp Slave tester!!!!--> Have one on the house. "Its prefectly good minus all the bad stuff" -Ben333 |
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#24 |
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Nice thread and sticky. I would add the following links as additional reading to the sticky: http://www.anandtech.com/gadgets/sho...spx?i=3034&p=1 http://www.anandtech.com/cpuchipsets...oc.aspx?i=3044 http://www.anandtech.com/systems/showdoc.aspx?i=3060 And this should be of some interest going forward: http://blogs.zdnet.com/hardware/?p=4254
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1/Asus P6T SE,Core i7 920 ( H2O ),ATI Radeon 5870 ( H2O ),OCZ Reaper 6 GB,OCZ Z 1000W modular ps,Seagate 7200.8 250 x2,WD Caviar Black 1TB,Nec AD-7170A,LG GGC Asus USB3.0 and SATA 6g cardBlu-ray/HD DVD drive and burner,Modified Koolance Tower , Swiftech GTZ, Koolance chipset and memory blocks, Modified Maze4 GPU cooler,Vista Ultimate 64 2/Sony Vaio SR590,Core 2 Duo P7450, ATI 4570m, 4GB DDR2, Win 7 64bit 3/PS3 80 GB Intermittent FOLDING: system 1, ATI 4870 and PS3 for Team 32 " Fear of GOD is the beginning of wisdom " "The grass withereth, the flower fadeth, but the word of our GOD shall stand forever." Fold for Team 32 |
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#25 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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^ Nice Suby. And nice links, they will be handy as the thread ages. |
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#26 |
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1/Asus P6T SE,Core i7 920 ( H2O ),ATI Radeon 5870 ( H2O ),OCZ Reaper 6 GB,OCZ Z 1000W modular ps,Seagate 7200.8 250 x2,WD Caviar Black 1TB,Nec AD-7170A,LG GGC Asus USB3.0 and SATA 6g cardBlu-ray/HD DVD drive and burner,Modified Koolance Tower , Swiftech GTZ, Koolance chipset and memory blocks, Modified Maze4 GPU cooler,Vista Ultimate 64 2/Sony Vaio SR590,Core 2 Duo P7450, ATI 4570m, 4GB DDR2, Win 7 64bit 3/PS3 80 GB Intermittent FOLDING: system 1, ATI 4870 and PS3 for Team 32 " Fear of GOD is the beginning of wisdom " "The grass withereth, the flower fadeth, but the word of our GOD shall stand forever." Fold for Team 32 |
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#27 |
![]() ![]() ![]() Member Join Date: Jul 2009
Location: SLO Town
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Thank you for this. Helped me understand so I wouldn't get confused in the future. ![]() |
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#28 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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Glad I can be of said assistance. P.S. My #2 reserved post will eventually be an upgrade for 'modern' systems.... in another few years.
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Q9650 @ 4ghz, ASUS P5KP35 300GB V-Raptor, 1.0TB CaviarB64MB eVGA GTX285, 4GB 1069mhz Dominator Enermax Infiniti 720W, Dell 2408wfp Win7Ux64, NZXT Adamas Case Heat Have 4GBs of RAM and Windows reports only 3.xx? Read the Sticky!
Last edited by nightelph; 07-14-09 at 09:22 PM. |
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#29 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Join Date: Sep 2004
Location: SF Bay, CA
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Updated. Thanks redduc900. |
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#30 |
![]() ![]() ![]() Member Join Date: Apr 2002
Location: HOT! South Texas
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Thanks, just what I was looking for ![]()
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Gateway now, my water cooled system sprung a leak, total disaster. |
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