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1090T - Faulty 1GHz OC

post #1 of 15
Thread Starter 
Hi, I've been having some major issues with my 1090T, basically saying OC to 4,2GHz per core. To achieve that I needed to have 1.575V on the CPU, once below 1.5V it's unstable and powers off immediatley. With that I've ran a 1 hour stress test with AMD OverDrive - Core temps have Never exceeded 48c under full load (Processor temperature was 5c warmer than the core temps). It was a bad OC causing me to get stuttering and frameskips in GTA IV.

CPU Multiplier : 20.0x
CPU Bus frequency : 210MHz
CPU NB Freq : 2750MHz
CPU Voltage : 1.575V
CPU/NB Voltage : 1.25V

Aparently I'm running on 3600MHz per core @ 1.375V w/o frameskipping or stuttering - fully stable. (had that on air before as well)

I ain't as good with OC'ing I guess, ideally I'd want to achieve a stabilized clock of 4200MHz per core. Thanks in advance.
post #2 of 15
What is your HT frequency? Keep it around 2000. Also lower the NB some for testing just to make sure it's not a limiting factor.
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post #3 of 15
I would think you woiuld need a smidge more CPU-NB voltage. When it fails prime what size does it fail on?
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post #4 of 15
Thread Starter 
Quote:
Originally Posted by CryWin View Post
What is your HT frequency? Keep it around 2000. Also lower the NB some for testing just to make sure it's not a limiting factor.
I'm keeping the HT at Auto value (what ever it is by default), and increasing it doesn't seem to help. Gonna try lowering the NB to stock values, will report in a moment.

@dave12
It doesn't BSoD, neither it does not fail in stress tests - I've said that frameskipping and stuttering are visible in few of the games.
post #5 of 15
It doesn't need to BSOD to fail Prime. You can get errors from instability that can point you in the right direction. That aside, I'm accustomed to seeing higher CPU-NB voltage with memory and NB speed you have.
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post #6 of 15
Lower that multiplier and pump bus instead. CPU/NB clocks to 1.325V, and see if that helps.
   
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post #7 of 15
Thread Starter 
Just ran Prime95 with 20x multiplier and bus @ 200MHz with 1.575V - test failed, 1.5V and below - fail. Off to try doing what Artikbot suggested.

Edit:
Bus increased to 222MHz, Multiplier down to 19x with identical voltage, CPU NB upped from 1.0V to 1.2V - prime95 fails even faster now.

Most stable so far:
1.575V, Multiplier : 21x , Bus : 200MHz
Still, there's always 1 core failing the test.

Frameskipping is also noticeable.
Last thing I wanna do is bump up the CPU voltages up to 1.6 - would it make a difference & is it safe for the CPU ?
Edited by MostWanted095 - 2/14/11 at 2:28pm
post #8 of 15
Quote:
Originally Posted by MostWanted095 View Post
Just ran Prime95 with 20x multiplier and bus @ 200MHz with 1.575V - test failed, 1.5V and below - fail. Off to try doing what Artikbot suggested.

Edit:
Bus increased to 222MHz, Multiplier down to 19x with identical voltage, CPU NB upped from 1.0V to 1.2V - prime95 fails even faster now.

Most stable so far:
1.575V, Multiplier : 21x , Bus : 200MHz
Still, there's always 1 core failing the test.

Frameskipping is also noticeable.
Last thing I wanna do is bump up the CPU voltages up to 1.6 - would it make a difference & is it safe for the CPU ?
Try This for 4.2GHz

Use just 2 sticks of your RAM(black slots)

Turbo Core.........Disable
FSB..................240
Multi.................17.5
CPU/NB freq.......2640
HT Link..............1920
RAM..................1600 8-8-8-24
CPU Volt............1.475V(I need 1.45V for 4.25GHz)
CPU/NB volt........1.30V
RAM volt............1.70V(check RAM sticker for voltage)

Load Line Calib......Enable(full calibration)
Spread spectrum...Disable
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post #9 of 15
Thread Starter 
Quote:
Originally Posted by IOSEFINI View Post
Turbo Core.........Disable
FSB..................240
Multi.................17.5
CPU/NB freq.......2640
HT Link..............1920
RAM..................1600 8-8-8-24
CPU Volt............1.475V(I need 1.45V for 4.25GHz)
CPU/NB volt........1.30V
RAM volt............1.70V(check RAM sticker for voltage)

Load Line Calib......Enable(full calibration)
Spread spectrum...Disable
I'm afraid I require all 3 sticks of memory to be present and due to my H70 the removal would take time.

Did as you said, except I've had to bump up the voltages up to 1.525 - which still resulted in Prime95 failed calculation tests (if it's any use: all of them appear on CPU#6). Any way to get around that with out memory removal ?
post #10 of 15
Quote:
Originally Posted by MostWanted095 View Post
Hi, I've been having some major issues with my 1090T, basically saying OC to 4,2GHz per core. To achieve that I needed to have 1.575V on the CPU, once below 1.5V it's unstable and powers off immediatley. With that I've ran a 1 hour stress test with AMD OverDrive - Core temps have Never exceeded 48c under full load (Processor temperature was 5c warmer than the core temps). It was a bad OC causing me to get stuttering and frameskips in GTA IV.

CPU Multiplier : 20.0x
CPU Bus frequency : 210MHz
CPU NB Freq : 2750MHz
CPU Voltage : 1.575V
CPU/NB Voltage : 1.25V

Aparently I'm running on 3600MHz per core @ 1.375V w/o frameskipping or stuttering - fully stable. (had that on air before as well)

I ain't as good with OC'ing I guess, ideally I'd want to achieve a stabilized clock of 4200MHz per core. Thanks in advance.
Actually have a pretty easy, unfortunate answer for you. If your core temp is hitting around 48C then your cpu temp is around 58c. You are probably stable with less volts, but these chips are very unstable when temps go over 56C or so. Not only that but you should be able to do 3600mhz on stock 1.30v. And your CPU NB is way too low. I need 1.40v to hit 2800mhz on the nb.
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