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Prime95 fails, but Hyperpi is ok

post #1 of 7
Thread Starter 
Recently got a better PSU and decided to try 2 more stick of 2gb Gskill ripfires (4sticks @ 8)

It seems waaay more stable, but that could be because I stopped putting voltage to the NB CPU, and stuck with the VID control, as this forum taught me.


Yet, with the four sticks in, I fail threads (AMD 720 X3 with fourth core unlocked) on Prime95, fairly quickly.

Yet, when I run Hyperpi at 32m, it chugs right along with no bsods (Im assuming thats the indication that it has failed...bsods...cause the internet is saying nothing about the junk program) and completes the task.


If my board cant handle the new sticks of ram, would it have been able to complete the Hyperpi? Does anyone know where I can find instructions on interpreting the results of hyperpi?
post #2 of 7
What is the speed of your RAM?
You may need to run at lower 1333Mhz speed due to your 720 being a C2 revision processor as with all x3s (if you're trying @ 1600). Adding voltage to the CPU-NB may help.
post #3 of 7
Thread Starter 
Its just stock 1333 and timings yet more voltage to VID control and DRAM.

But, it passes Hyperpi yet fails Prime, what does that mean? Is hyperpi not a good mem tester?
post #4 of 7
Try disabling the forth core.
HTPC
(11 items)
 
  
CPUMotherboardRAMHard Drive
AMD A-3870K AsRock A75 Pro (FM1) HyperX DDR3 1866 8 GB SAMSUNG 830 256gb 
Hard DriveOptical DriveCoolingOS
SAMSUNG EcoGreen F4 2TB Plextor Black Blu-ray Burner Phenom II X4 stock Cooler Windows 10 
MonitorPowerCase
LG M2762D-PM Glossy Black 27" 5ms (1920x1080) Antec HG 900 Gerenic ATX Case 
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HTPC
(11 items)
 
  
CPUMotherboardRAMHard Drive
AMD A-3870K AsRock A75 Pro (FM1) HyperX DDR3 1866 8 GB SAMSUNG 830 256gb 
Hard DriveOptical DriveCoolingOS
SAMSUNG EcoGreen F4 2TB Plextor Black Blu-ray Burner Phenom II X4 stock Cooler Windows 10 
MonitorPowerCase
LG M2762D-PM Glossy Black 27" 5ms (1920x1080) Antec HG 900 Gerenic ATX Case 
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post #5 of 7
Thread Starter 
So I tinkered with voltages, the FSB and multipliers, and finally found a very narrow band that works.

230 FSB, 14x on cpu 11x on NB, 5.55x on the RAM @ 613.3 MHz DRAM, 1.66 DRAM voltage, 1.4 NB VID control, 1.3 NB Core voltage.

Works out to 1227 or something and I've been testing the timings down to 7-7-7-21 and prime95 has been stable for ages.


Im completely clueless. Truly am. Its such a narrow band: a tic or two more to voltage or FSB and it'll BSOD or fail prime95 in under 8min, too little and it does the same. Truly, AMD's are FSB and not multiplier machines!

I've yet to monkey with my CPU's voltage, its currently 1.392 (only +.075), and maybe I'd get better stability, but Im kinda happy with where this is going.


So, my question is, will reducing the RAM multiplier down to 5.55x and increasing the FSB to compensate be worse than having a higher multiplier and lower FSB?

Gigabyte GA-MA770-udp3 ver 1.1
Phenom II x3 720 unlocked Fourth
4 sticks Gskill Ripfires 1600 9-9-9-24
New Antec 550watt PSU (reason I think I'm actually stable)

Quote:
Originally Posted by dixson01974 View Post
Try disabling the forth core.
I added a smidgens more juice to teh CPU, maybe that was what was failing soo much? More expirementing to see.


For searching postierity, here's my original 4 stick thread: http://www.overclock.net/amd-memory/...l#post13210175
Edited by haniblecter - 5/14/11 at 2:54pm
post #6 of 7
The forth core was disable for some reason and the can cause that problem with the narrow band.
EDIT
Just checking something. What Video card are you using?
Edited by dixson01974 - 5/14/11 at 3:10pm
HTPC
(11 items)
 
  
CPUMotherboardRAMHard Drive
AMD A-3870K AsRock A75 Pro (FM1) HyperX DDR3 1866 8 GB SAMSUNG 830 256gb 
Hard DriveOptical DriveCoolingOS
SAMSUNG EcoGreen F4 2TB Plextor Black Blu-ray Burner Phenom II X4 stock Cooler Windows 10 
MonitorPowerCase
LG M2762D-PM Glossy Black 27" 5ms (1920x1080) Antec HG 900 Gerenic ATX Case 
  hide details  
Reply
HTPC
(11 items)
 
  
CPUMotherboardRAMHard Drive
AMD A-3870K AsRock A75 Pro (FM1) HyperX DDR3 1866 8 GB SAMSUNG 830 256gb 
Hard DriveOptical DriveCoolingOS
SAMSUNG EcoGreen F4 2TB Plextor Black Blu-ray Burner Phenom II X4 stock Cooler Windows 10 
MonitorPowerCase
LG M2762D-PM Glossy Black 27" 5ms (1920x1080) Antec HG 900 Gerenic ATX Case 
  hide details  
Reply
post #7 of 7
Thread Starter 
Quote:
Originally Posted by dixson01974 View Post
The forth core was disable for some reason and the can cause that problem with the narrow band.
EDIT
Just checking something. What Video card are you using?
Radeon HD 5750 1gig, pretty sure I got it OC'd a bit. In addition to a name brand PSU (its seroiusly twice the weight of the 25 dollar 585 I had) I also got a new case, Cooler Master Sniper Scout. Better flow, spot cooler on teh ram, and made an active cooling solution for my NB.
Edited by haniblecter - 5/14/11 at 5:54pm
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