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Help with 4ghz overclock with Phenom II x6 1090T on gigabyte 990FXA-D3 mobo.

post #1 of 15
Thread Starter 
Hi everyone.

just installed my old computer in a new case with a new cooler and PSU.

Gigabyte 990FXA-D3 mobo.
AMD Phenom 1090T BE edition.
dual channel corsair vengeance CL9 ram 2x4g 1600mhz
Cooler Master silent pro 1300w PSU.
Corsair H80.

trying to reach 4ghz over clock.
so far i have it stable at 3.8ghz @1.45V and 3.9@1.55 prime crashes at voltages lower then 1.55 o.o for clocks higher then 3.8

but as soon as i go to 4.0 it crashes. i have taken the vcore up to 1.55 but i dont want to go any higher because people say they can achieve 4.0ghz @1.45v.

when i ran prime95 at 4ghz @1.55v the test ran for about a minute then 1 core would crash then the whole system would BSOD.
my system is not running hot.

i have disabled all the power saving crap in the bios and im just increasing the multiplier and the voltage for the cpu.

does anyone know if i am doing something wrong? or does anyone have any advice for me?
post #2 of 15
You have to increase the cpu/nb in order to stabilize higher clocks

read da gappo guide..It explains everything..in order
The order is kind of important wink.gif
http://www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys/0_20
 
Thuban Powah!
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Thuban Powah!
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CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
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post #3 of 15
Thread Starter 
Ahh so you can't oc your CPU to high clocks with out ocing everything else? I'm new to overclocking.
post #4 of 15
Thread Starter 
iPhone won't let me edit the above post.

Does the NB generate much more heat when overclocked?
post #5 of 15
it kinda does.um..i aim a fan at it..hopefully yours has a heatsink on it
 
Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
OSMonitorKeyboardPower
Windows & Linux Samsung 1080p 2 ms Dell Thermaltake TR2-800 
CaseMouse
Cooler Master Elite 330 (was) cheap 
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Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
OSMonitorKeyboardPower
Windows & Linux Samsung 1080p 2 ms Dell Thermaltake TR2-800 
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Cooler Master Elite 330 (was) cheap 
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post #6 of 15
Thread Starter 
It has rectangle shape piece of metal about 4-5cm long and about 1.5cm high
post #7 of 15

You need to stop overclocking on this board, which is not built for overclocking purposes, and get the VRM setup cooled first for reliable and stable operation.  See the link in my sig: About VRMs & MOSFETs.  Leaving VRMs out with no cooling is EXTREMELY unwise.

post #8 of 15
there are 2 nb which you need to address...the mb-nb which has the heatsink on it needs to have a voltage bump to keep ram stable

the cpu-nb will also need a voltage bump and a multiplier increase...your cpu will perform best with cpu-nb somewhere in the area of 2800 with a voltage of around 1.3v

these adjustments will aid in keeping your cpu stable and add to overall performance...but as xd stated you need to get some heatsinks on your vrm's because the extra load you put on them will generate alot of extra heat...make one out of and old cpu cooler and attach with heat tape or for a more permanent installation use a thermal adhesive

you can also buy heatsinks but they won't work any better than cutting a few for yourself wink.gif

the guide schmuckley recommended is required reading for your venture into making your 1090t sing thumb.gif
Edited by mrinnocent - 2/4/12 at 9:01pm
easyfps
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easyfps
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post #9 of 15
Quote:
Originally Posted by TwistedFate69 View Post

iPhone won't let me edit the above post.
Does the NB generate much more heat when overclocked?

your cpu-nb will add some heat to your cpu temps

the mb-nb is the one on mb and it too will heat up abit with added voltage and load smile.gif
easyfps
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD 1100T @4.3 3120cpu/nb 24/7 ASRock 890FX DELUXE5 2 X Powercolor HD6950 2g @1000/1425 Ripjaw 6-9-6-1T @ 1920 
Hard DriveHard DriveCoolingCooling
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easyfps
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Hard DriveHard DriveCoolingCooling
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post #10 of 15

The MB NB does not necessarily bring RAM to stability but it has been known to do that as a last resort.  Technically it really only provides the ref clock, PCI-E lanes and HT link lanes; it has little to do with the RAM.  The CPU-NB (integrated memory controller) has to do with the RAM because it is the interface to the RAM from the CPU.

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