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General Overclocking Question

post #1 of 2
Thread Starter 
Recently I installed another GTX 470 into my system and noticed that I could no longer post into the system with my small overclock (XMP profile)
I was wondering why. Could it possibly be due to the added hardware or are there some settings I should try tweaking manually? If its due to the hardware, should I consider getting a larger power supply? (if so, how big?)
    
CPUMotherboardGraphicsRAM
i7 2600k Gigabyte P67A-UD7-B3 EVGA GTX 470 x2 G.Skill F3-12800CL9D-4GBNQ (2GB x 4) 
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Western Digital Caviar Blue WD6400AAKS Windows 7 X64 Samsung SyncMaster PX2370 Logitech G510 
PowerCaseMouse
Corsair HX 1050 CM 690 II Advanced Razer Mamba 
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CPUMotherboardGraphicsRAM
i7 2600k Gigabyte P67A-UD7-B3 EVGA GTX 470 x2 G.Skill F3-12800CL9D-4GBNQ (2GB x 4) 
Hard DriveOSMonitorKeyboard
Western Digital Caviar Blue WD6400AAKS Windows 7 X64 Samsung SyncMaster PX2370 Logitech G510 
PowerCaseMouse
Corsair HX 1050 CM 690 II Advanced Razer Mamba 
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post #2 of 2
It's certainly not the PSU because even the HX650 could power this system.

I think that it's just because adding the 2nd 470 destabilized the system due to adding such a large new variable to it.

I still remember upgrading from the 8600 GTS to the 9800 GTX+, and then from the 9800 GTX+ to the GTX 260: each time I did that, I had to re-stabilize my system (I even had the HX520, so it certainly wasn't a lack of power). And then it happened again when I got my GTX 465. Fortunately, it stayed stable when I unlocked it to a 470! But I imagine it stayed stable because of the relatively tiny difference as compared to the previous upgrades.

But come to think of it, I wouldn't be a bit surprised if the increased load on the PSU has something to do with it because that's a big increase in the power draw there. I mean, the HX750 certainly has enough power for your system, but I bet that this change in power draw may be a pretty big factor. So this makes me wonder if your system was only barely stable before.
Edited by TwoCables - 3/10/11 at 10:30pm
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
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