Overclock.net › Forums › AMD › AMD - General › OC Help
New Posts  All Forums:Forum Nav:

OC Help - Page 3

post #21 of 25
Thread Starter 
Still trudging along here. I started from scratch and went ahead and set CPU and memory back at stock and am trying to OC the NB again. I can get it to 2200Mhz with no voltage increase, but 2250 requires 1.175v. 2300 requires 1.2v and 2400 requires 1.25v. So, basically I am having to increase voltage .5v for every 100MHz of NB increase. So, if I want 2600Mhz on the NB, I will need 1.35v, and for 2700 I will need 1.4v.

Every increase in NB I run a 5-10 minute Prime95 blend test. My computer is not BSOD'ing but rather I am getting rounding errors. The weird thing is it is always failing the test with the same core. And when the one core fails, the other core just keeps running like a champ. Is this a sign of a bad core or just an unstable OC?
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
post #22 of 25
I've found that when one or two workers fail (rather than BSOD) and it shows a rounding error that it is usually a sign of either cpu/nb voltage or ram voltage being a little low. Just a little unstable yet is all.

Another few points I'd share is to

1st. OC the cpu first (isolated), and stabilized w/12 hrs of prime95

2nd. OC mobo using HTT (ref clock) (isolated, while maintaining near stock CPU, NB Freq, HT Link Speed, and Ram Freq)

3rd. Add CPU and HTT OC together and stabilize

4th. Raise NB Freq and maintain HT Link Speed of 2000MHz (stabilize)

5th. OC Ram as a finial step and pass finial stability test of 24 hrs of prime95.

Doing things this way makes it easier to know what is causing instability
Ryzen Build
(20 items)
 
 
Bruce
(14 items)
 
CPUMotherboardGraphicsRAM
R7 1800x Crosshair VI Hero Diamond 7970 GSkill FlareX F4-3200C14D-16GFX  
Hard DriveHard DriveHard DriveHard Drive
Samsung 960 EVO NVMe Samsung 840 SSD Corsair GT SSD WD 2TB Black 
Hard DriveCoolingCoolingCooling
WD 4TB Red EK-FB Asus C6H Monoblock XSPC GPU Razor WB XSPC RX 360 
CoolingCoolingCoolingCooling
XSPC RS 360 XSPC EX140 D5 Vario Gentle Typhoon AP-15 1850 rpm 
OSMonitorPowerCase
Win 10 Pro Asus VE248H x2 EVGA 850 G2 Xigmatek Elysium 
CPUMotherboardGraphicsRAM
FX 6350 Asus M5A99FX Pro R2.0 GTX220 G.Skill Ripjaws X F3-17000CL9D-8GBXLD 9-11-9-28... 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro WD20EFRX 64M Red x4 raid 10 WD5001AALS Blk Asus DRW-24B1ST 
CoolingOSMonitorKeyboard
Hyper 212 Evo R2 Windows Server 2008 R2 Standard Asus  Logitech MK300 
PowerCase
Corsair HX500 Corsair 330R Titainium 
  hide details  
Reply
Ryzen Build
(20 items)
 
 
Bruce
(14 items)
 
CPUMotherboardGraphicsRAM
R7 1800x Crosshair VI Hero Diamond 7970 GSkill FlareX F4-3200C14D-16GFX  
Hard DriveHard DriveHard DriveHard Drive
Samsung 960 EVO NVMe Samsung 840 SSD Corsair GT SSD WD 2TB Black 
Hard DriveCoolingCoolingCooling
WD 4TB Red EK-FB Asus C6H Monoblock XSPC GPU Razor WB XSPC RX 360 
CoolingCoolingCoolingCooling
XSPC RS 360 XSPC EX140 D5 Vario Gentle Typhoon AP-15 1850 rpm 
OSMonitorPowerCase
Win 10 Pro Asus VE248H x2 EVGA 850 G2 Xigmatek Elysium 
CPUMotherboardGraphicsRAM
FX 6350 Asus M5A99FX Pro R2.0 GTX220 G.Skill Ripjaws X F3-17000CL9D-8GBXLD 9-11-9-28... 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro WD20EFRX 64M Red x4 raid 10 WD5001AALS Blk Asus DRW-24B1ST 
CoolingOSMonitorKeyboard
Hyper 212 Evo R2 Windows Server 2008 R2 Standard Asus  Logitech MK300 
PowerCase
Corsair HX500 Corsair 330R Titainium 
  hide details  
Reply
post #23 of 25
An X2 545 is a C2 revision chip and will not OC as well as a C3 chip. You might be able to unlock the two other cores on the right board however.
My System
(13 items)
 
  
CPUMotherboardRAMOS
Phenom II X4 B45 @ 3.37 Biostar TA790GXB3 4G Crucial Ballistix Tracer @1500 CL8 Windows 7 Ultimate 32 bit 
MonitorPowerCase
Samsung SyncMaster 2233 Ultra LSP750 Nexus Clodius 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardRAMOS
Phenom II X4 B45 @ 3.37 Biostar TA790GXB3 4G Crucial Ballistix Tracer @1500 CL8 Windows 7 Ultimate 32 bit 
MonitorPowerCase
Samsung SyncMaster 2233 Ultra LSP750 Nexus Clodius 
  hide details  
Reply
post #24 of 25
Thread Starter 
Quote:
Originally Posted by coonmanx;12080609 
An X2 545 is a C2 revision chip and will not OC as well as a C3 chip. You might be able to unlock the two other cores on the right board however.

Yeah I am beginning to regret not shelling out the extra $30 for a 550 BE.
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
post #25 of 25
Thread Starter 
Quote:
Originally Posted by The Sandman;12078287 
I've found that when one or two workers fail (rather than BSOD) and it shows a rounding error that it is usually a sign of either cpu/nb voltage or ram voltage being a little low. Just a little unstable yet is all.

I just ran Prime95 all day today and got a rounding error on one core after 2 hours. The other core was still running strong when I got home (10 hours). I only have the CPU OC'ed to 3.4GHz (@ 1.4v), which is kind of a high voltage for that mild OC. The RAM is only clocked at 1512Mhz at 1.6v, so I am thinking I have some crappy RAM. It passes memtest but it just doesn't like Prime95.
Quote:
Another few points I'd share is to

1st. OC the cpu first (isolated), and stabilized w/12 hrs of prime95

2nd. OC mobo using HTT (ref clock) (isolated, while maintaining near stock CPU, NB Freq, HT Link Speed, and Ram Freq)

Don't I have to do both at once? I don't have a black edition CPU, so in order to OC the CPU I have to OC the reference clock.

At any rate, I did a reference clock OC when I first got the board. I turned every multiplier to its lowest setting and was able to achieve a 280 reference clock before crashing -- and this was with everything at stock voltages.

But I guess I will start from scratch again and begin with the CPU ref clock.

EDIT:

After a couple of hours of CPU overclocking, I have found that I can get it to 3.5GHZ at 1.425v. I can get it to 3.7GHz at 1.5v. (Both of these clocks will pass a Prime95 Blend test for about 15 minutes).

I checked AMD's website and the max Vcore for this proc is 1.425v. So, there is no way I am running it at 1.5v for any extended period of time. When people say that AMD says 1.5v is safe, they are talking about the QUAD core processors. Since this is a dual-core, the max voltage is 1.425 according to AMD.

My temps at 3.5Ghz (1.425v) are about 36C under a Prime95 load. At 3.7Ghz (1.5v), I am at 40C under load. So temps are not an issue. My cooler is pretty much a clone of the Arctic Freezer 7 (plus I have lapped it). Still though, it doesn't matter how low temps are -- over-volting can still kill a processor even under ice cold conditions.

At any rate, I guess it was not my RAM after all. All the BSOD's and rounding errors disappeared after I increased the Vcore to these insane rates. It seems that my CPU has to have a LOT of juice to OC to any decent amount. I guess I am not as lucky as a lot of people who say they get 3.7GHz with just a single bump in Vcore.

I think I will drop it back down to 3.5Ghz (@1.425v) for my 24/7 OC. Now I need to figure out how to get the CPU-NB overclocked. Right now I am running it slightly under stock. After that I will mess with RAM timings, which I am sure I will need help on.
Edited by thiussat - 1/20/11 at 8:11pm
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
Skylake Build
(12 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5-6600k Gigabyte Z-170 Gaming 7 Gigabyte R9 390  Gskill Ripjaws V DDR4 
Hard DriveCoolingOSMonitor
Samsung 850 Evo Corsair H115i Windows 10 Pro Asus  
KeyboardPowerCaseMouse
Generic EVGA NEX750 G1 Phanteks Eclipse P400 GSkill MX780 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD - General
Overclock.net › Forums › AMD › AMD - General › OC Help