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VSYNC FPS keeps dropping far below cap

post #1 of 2
Thread Starter 
Title didn't make much sense but I'll try to explain it better...

I just recently did the Lightboost Hack on 3 of my VG248QE monitors. Prior to this when playing a game like League of Legends with VSync on my FPS would be capped at 120 and never drop a single frame. After the hack, if I keep Vsync on it'll cap at 120 - 119 but occasionally it'll drop to the 20s and 30s before spiking back. I'd assume my graphics card might not be able to handle the lightboost, but if I turn VSync off my FPS stays above 300 constantly. What's happening that causes VSync to make my FPS stutter?

Also, I understand that with these monitors I don't need Vsync, but turning it on does bring my temps down around 10c.
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Bleeding Edge
(29 items)
 
Prototype 01
(18 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-2600K 4.7 GHz at 1.34v with HT En... Asus Maximus IV Extreme EVGA SuperClocked GeForce GTX 780 - SLI G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 16... 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 PRO Series 512GB Solid State Drive OCZ Vertex 3 Series - MAX IOPS Edition 120GB So... Western Digital Blue Series 1TB 7200 RPM Intern... Western Digital Blue Series 1TB 7200 RPM Intern... 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital Black Series 2TB 7200 RPM Inter... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... ASUS BW-12D1S-U External 12X Blu-Ray Burner 
CoolingOSMonitorMonitor
Noctua NH-D14 120mm & 140mm SSO CPU Cooler Windows 8.1 Pro ASUS ROG SWIFT PG278Q 27" 144Hz G-SYNC Gaming M... ASUS PB278Q 27" 60 Hz WQHD PLS LED Monitor 
KeyboardPowerCaseMouse
Ducky Shine 3 Mechanical Keyboard with Cherry M... Enermax Revolution85+ 920w Power Supply  Corsair Obsidian 750D ATX Full Tower Computer ... Razer DeathAdder 2013 Gaming Mouse 
Mouse PadAudioAudioOther
Corsair Gaming MM200 Extended Edition Cloth Gam... Creative Sound Blaster X-Fi Titanium HD Sound Card Creative Sound Blaster X7 Limited Edition Beyerdynamic DT 990 Premium 250 Ohm Headphone 
OtherOtherOtherOther
AKG Q 701 Quincy Jones Signature Reference-Clas... Sennheiser HD 598 Headphones Sennheiser G4ME ONE Headset Emotiva Airmotiv 5s Powered Studio Monitors 
Other
VSONIC GR07 Bass Edition IEMs 
CPUMotherboardGraphicsGraphics
AMD Anthlon 64 FX-53 SledgeHammer 2.4 GHz Socke... DFI LanParty UT nForce4 Ultra EVGA GeForce 7800 GT - SLI EVGA GeForce 6800 Ultra 
RAMHard DriveHard DriveOptical Drive
OCZ 2GB (2 x 1GB) DDR PC-3200 Platinum Enhanced... Western Digital Raptor 74GB 10,000 RPM SATA Int... Western Digital Raptor 74GB 10,000 RPM SATA Int... Sony CRX320E Internal DVD Burner 
Optical DriveOSMonitorPower
Sony DRU-700A Internal Double Layer DVD Burner Windows XP Professional 32-Bit NEC FP2141SB 22" CRT Monitor PC Power & Cooling 510W ATX-Deluxe Power Supply 
CaseMouseMouse PadAudio
Lian Li PC-62B Black Aluminum ATX Mid Tower Com... Logitech MX 518 High Performance Optical Gaming... fUNC sUrface 1030 Competition Mouse Pad Creative Sound Blaster X-Fi XtremeMusic Sound Card 
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Klipsch ProMedia 2.1 THX Certified Computer Spe... CoolerMaster AeroGate II 4 Channel Fan Controller 
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post #2 of 2
Thread Starter 
Still having this issue, even bringing down the refresh rate to 100 Hz didn't help... I still get a drop in FPS sporadically. The only thing I've changed is my monitors in addition to add another one. This happens when I play games on one monitor and with 2 overclocked GTX 580s in SLI, I don't see how an extra monitor should cause this problem when I'm not even playing the game in Surround.
Bleeding Edge
(29 items)
 
Prototype 01
(18 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-2600K 4.7 GHz at 1.34v with HT En... Asus Maximus IV Extreme EVGA SuperClocked GeForce GTX 780 - SLI G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 16... 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 PRO Series 512GB Solid State Drive OCZ Vertex 3 Series - MAX IOPS Edition 120GB So... Western Digital Blue Series 1TB 7200 RPM Intern... Western Digital Blue Series 1TB 7200 RPM Intern... 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital Black Series 2TB 7200 RPM Inter... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... ASUS BW-12D1S-U External 12X Blu-Ray Burner 
CoolingOSMonitorMonitor
Noctua NH-D14 120mm & 140mm SSO CPU Cooler Windows 8.1 Pro ASUS ROG SWIFT PG278Q 27" 144Hz G-SYNC Gaming M... ASUS PB278Q 27" 60 Hz WQHD PLS LED Monitor 
KeyboardPowerCaseMouse
Ducky Shine 3 Mechanical Keyboard with Cherry M... Enermax Revolution85+ 920w Power Supply  Corsair Obsidian 750D ATX Full Tower Computer ... Razer DeathAdder 2013 Gaming Mouse 
Mouse PadAudioAudioOther
Corsair Gaming MM200 Extended Edition Cloth Gam... Creative Sound Blaster X-Fi Titanium HD Sound Card Creative Sound Blaster X7 Limited Edition Beyerdynamic DT 990 Premium 250 Ohm Headphone 
OtherOtherOtherOther
AKG Q 701 Quincy Jones Signature Reference-Clas... Sennheiser HD 598 Headphones Sennheiser G4ME ONE Headset Emotiva Airmotiv 5s Powered Studio Monitors 
Other
VSONIC GR07 Bass Edition IEMs 
CPUMotherboardGraphicsGraphics
AMD Anthlon 64 FX-53 SledgeHammer 2.4 GHz Socke... DFI LanParty UT nForce4 Ultra EVGA GeForce 7800 GT - SLI EVGA GeForce 6800 Ultra 
RAMHard DriveHard DriveOptical Drive
OCZ 2GB (2 x 1GB) DDR PC-3200 Platinum Enhanced... Western Digital Raptor 74GB 10,000 RPM SATA Int... Western Digital Raptor 74GB 10,000 RPM SATA Int... Sony CRX320E Internal DVD Burner 
Optical DriveOSMonitorPower
Sony DRU-700A Internal Double Layer DVD Burner Windows XP Professional 32-Bit NEC FP2141SB 22" CRT Monitor PC Power & Cooling 510W ATX-Deluxe Power Supply 
CaseMouseMouse PadAudio
Lian Li PC-62B Black Aluminum ATX Mid Tower Com... Logitech MX 518 High Performance Optical Gaming... fUNC sUrface 1030 Competition Mouse Pad Creative Sound Blaster X-Fi XtremeMusic Sound Card 
OtherOther
Klipsch ProMedia 2.1 THX Certified Computer Spe... CoolerMaster AeroGate II 4 Channel Fan Controller 
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Bleeding Edge
(29 items)
 
Prototype 01
(18 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-2600K 4.7 GHz at 1.34v with HT En... Asus Maximus IV Extreme EVGA SuperClocked GeForce GTX 780 - SLI G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 16... 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 PRO Series 512GB Solid State Drive OCZ Vertex 3 Series - MAX IOPS Edition 120GB So... Western Digital Blue Series 1TB 7200 RPM Intern... Western Digital Blue Series 1TB 7200 RPM Intern... 
Hard DriveHard DriveHard DriveOptical Drive
Western Digital Black Series 2TB 7200 RPM Inter... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... Samsung Spinpoint F3 1TB 7200 RPM Internal Hard... ASUS BW-12D1S-U External 12X Blu-Ray Burner 
CoolingOSMonitorMonitor
Noctua NH-D14 120mm & 140mm SSO CPU Cooler Windows 8.1 Pro ASUS ROG SWIFT PG278Q 27" 144Hz G-SYNC Gaming M... ASUS PB278Q 27" 60 Hz WQHD PLS LED Monitor 
KeyboardPowerCaseMouse
Ducky Shine 3 Mechanical Keyboard with Cherry M... Enermax Revolution85+ 920w Power Supply  Corsair Obsidian 750D ATX Full Tower Computer ... Razer DeathAdder 2013 Gaming Mouse 
Mouse PadAudioAudioOther
Corsair Gaming MM200 Extended Edition Cloth Gam... Creative Sound Blaster X-Fi Titanium HD Sound Card Creative Sound Blaster X7 Limited Edition Beyerdynamic DT 990 Premium 250 Ohm Headphone 
OtherOtherOtherOther
AKG Q 701 Quincy Jones Signature Reference-Clas... Sennheiser HD 598 Headphones Sennheiser G4ME ONE Headset Emotiva Airmotiv 5s Powered Studio Monitors 
Other
VSONIC GR07 Bass Edition IEMs 
CPUMotherboardGraphicsGraphics
AMD Anthlon 64 FX-53 SledgeHammer 2.4 GHz Socke... DFI LanParty UT nForce4 Ultra EVGA GeForce 7800 GT - SLI EVGA GeForce 6800 Ultra 
RAMHard DriveHard DriveOptical Drive
OCZ 2GB (2 x 1GB) DDR PC-3200 Platinum Enhanced... Western Digital Raptor 74GB 10,000 RPM SATA Int... Western Digital Raptor 74GB 10,000 RPM SATA Int... Sony CRX320E Internal DVD Burner 
Optical DriveOSMonitorPower
Sony DRU-700A Internal Double Layer DVD Burner Windows XP Professional 32-Bit NEC FP2141SB 22" CRT Monitor PC Power & Cooling 510W ATX-Deluxe Power Supply 
CaseMouseMouse PadAudio
Lian Li PC-62B Black Aluminum ATX Mid Tower Com... Logitech MX 518 High Performance Optical Gaming... fUNC sUrface 1030 Competition Mouse Pad Creative Sound Blaster X-Fi XtremeMusic Sound Card 
OtherOther
Klipsch ProMedia 2.1 THX Certified Computer Spe... CoolerMaster AeroGate II 4 Channel Fan Controller 
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Reply
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