10 replies to this topic

[effortless26]

Hello,
I am currently overclocking my CPU and it is running stable at 4.125GHz w/ 1.37V. On the first 3 cores, Prime 95 (small FFT) runs no problem, however, on the fourth core, I keep getting an error, specifically "FATAL Error: Rounding was 0.5 expected less than 0.4" But when I run LinX, that has no problems and completes successfully, with the fourth core 100% loaded all the time until the test completes (20 passes). I already got past the problem of throttling by setting the multiplier to 16.5x so it doesn't go any lower. I haven't changed any of the HT/NB multipliers or voltages, only the reference clock to OC the CPU. Considering this is a unlocked CPU, there is no point OC-ing with the multiplier because it just changes between 16.5 and my chosen multiplier all the time. Could it be instability or just a prime 95 bug? Thanks

EDIT: CPU runs at around 48/49C while running LinX using the Hyper TX3.

Edited by effortless26, 27 December 2011 - 11:46 AM.

[Lordred289]

Welome to the forums.

For starters, which motherboard do you have, which ram are you using, and how many sticks.


Disable Cool & Quiet.
Disable C1E.

I would try setting your HTT (FSB) to 230mhz
CPU Multi to 18.5
NB Multi to 13
HT multi to 9
Ram Divider to 1333 mode (1600 mode if you have 1866 memory) and set timing.

Report back to us, that should give you a core clock of 4255, a northbridge of 2990, HT of 2070, and Dram of 1533, or 1840.

But why stop at 4255? You have a bulldozer, if you have a decent cooler, I would bump that Multi up even more. Something like 1.4v and a 230x20 for 4600mhz.

~Red

Edited by Lordred289, 27 December 2011 - 08:32 PM.

[effortless26]

Lordred289, on 27 December 2011 - 08:31 PM, said:

Welome to the forums.

For starters, which motherboard do you have, which ram are you using, and how many sticks.


Disable Cool & Quiet.
Disable C1E.

I would try setting your HTT (FSB) to 230mhz
CPU Multi to 18.5
NB Multi to 13
HT multi to 9
Ram Divider to 1333 mode (1600 mode if you have 1866 memory) and set timing.

Report back to us, that should give you a core clock of 4255, a northbridge of 2990, HT of 2070, and Dram of 1533, or 1840.

But why stop at 4255? You have a bulldozer, if you have a decent cooler, I would bump that Multi up even more. Something like 1.4v and a 230x20 for 4600mhz.

~Red

My mobo is a Asus M5A78L-M LX and I have 1 Stick of Corsair ValueSelect 4GB DDR3-1333. I managed to get 4207 stable (with same voltage, but CPU-Z shows 1.4V) before your answer and I will try your suggestions now, my mobo doesn't seem to have a setting for C1E, but Cool and Quiet is disabled. I will reply back ASAP.
Jack

[HaCkEr]

Stop ur Overclock right now! That board aint for overclocking. You will just end up blowing ur pc. Trust me I have changed several motherboards over the past year, and u need M5A88 series AT THE LEAST to get some good OC, not to mention a good power supply to go with, like the Corsair VX450 or 550 or the TX series. If u dont have a good 80+ BRANDED PSU, then please remove the OC right now. Its for ur own safety

-Sam

[effortless26]

Tried your settings, but the board failed to POST. I know this because the graphics card fan will turn on then off and do that until I force shutdown the PC. Luckily, I have an Asus board which has C.P.R so I don't have to reset the CMOS every time it fails. I then tried multiplier only again, Windows booted fine but when running LinX, the multiplier will go from 21x (4.2GHz) back down to 16.5, which is the throttling issue I talked about before. I noticed that when CPU overclocking is set to Auto (hides the bus speed option), in the CPU configuration section, a option appears called Core C6 state, I disabled it but still had the trolling issue. I might just use my old settings and call it a day at 4.2GHz. I am disappointed that I couldn't get it higher, its either n00b overclocker or CPU/board limit. Thanks for the help.

[effortless26]

HaCkEr, on 27 December 2011 - 09:27 PM, said:

Stop ur Overclock right now! That board aint for overclocking. You will just end up blowing ur pc. Trust me I have changed several motherboards over the past year, and u need M5A88 series AT THE LEAST to get some good OC, not to mention a good power supply to go with, like the Corsair VX450 or 550 or the TX series. If u dont have a good 80+ BRANDED PSU, then please remove the OC right now. Its for ur own safety

-Sam

I bought the board for £20 off a friend so I couldn't complain there, my PSU is a PowerCool 80+ that I got from Scan.co.uk. I'm just going to give up anyway, its my own fault for buying a ***BAD*** motherboard.

[ExtremeGrandpa]

effortless26, on 27 December 2011 - 09:48 PM, said:

I bought the board for £20 off a friend so I couldn't complain there, my PSU is a PowerCool 80+ that I got from Scan.co.uk. I'm just going to give up anyway, its my own fault for buying a ***BAD*** motherboard.

Just in the future do a bit of research into the product before you purchase. But for that price its worth buying for a media PC or something along those lines.

I agree with hacker that pushing that board around will only result in you destroying it.

[Lordred289]

Aggreed

[Lordred289]

Oh my, I looked up the board, it is a 3+1 Phase based VRM, with no heatsink on them, and even worse, a 95W rating. You are on the edge running your CPU at stock. I would cut your OC to only what you can run with our a voltage bump. I would just replace the board with something that can handle a larger load.

[effortless26]

Ok, I'm looking at two different mobos, The Gigabyte GA-970A-UD3 (£81.56 ex. Delivery) and the Asus M5A97 (£75.56 ex. Delivery) From what I can see, these two look pretty much the same but which one do you think I should get?
Jack

[Lordred289]

I recomend the Gigabyte GA-970A-UD3 highly over the Asus M5A97.

The Gigabyte board has an 8+2 VRM which is heat sinked, while the Asus only has a 4+2 VRM.

Edited by Lordred289, 30 December 2011 - 05:01 AM.