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AMD Kaveri A10-7850K Overclock Guide - Page 51

post #501 of 1332
Is there any chance to get 2666Mhz DDR3 on this patform?. I cant pass 2400 (2540Mhz with 105 bclk)

Mobo: Asus A88xm-plus
Memory: 2x4Gb 2666Mhz 11-13-13-35 Geil Evo Potenza.

With 2400Mhz works right but with 2666 never boot frown.gif
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post #502 of 1332
I have observed many complaints here that BCLK won't go past 103-105 mhz in AHCI mode. How many have had luck with higher BCLK speeds in IDE mode? Can anyone among those who have had such good fortune tell me their top BCLK speed, and which board they were using? Thanks!
post #503 of 1332
Yup, i tried with IDE and AHCI with the same results. 105 works but 106 crash.
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post #504 of 1332
Hmm. Does the UEFI menu have an option to disable the SATA controller entirely? I realize that would be awfully . . . inconvinient, I'm just curious about the possibility that it isn't only the SATA controller causing problems.
post #505 of 1332
Quote:
s there any chance to get 2666Mhz DDR3 on this patform?. I cant pass 2400 (2540Mhz with 105 bclk)

Mobo: Asus A88xm-plus
Memory: 2x4Gb 2666Mhz 11-13-13-35 Geil Evo Potenza.

With 2400Mhz works right but with 2666 never boot

Well, if you cant get higher mhz, then try tighter timings at 2400mhz, like 10-12-12-34. The net result on performance may be the same or even better. thumb.gif
    
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post #506 of 1332
Quote:
Originally Posted by djohny24 View Post

Is there any chance to get 2666Mhz DDR3 on this patform?. I cant pass 2400 (2540Mhz with 105 bclk)

Mobo: Asus A88xm-plus
Memory: 2x4Gb 2666Mhz 11-13-13-35 Geil Evo Potenza.

With 2400Mhz works right but with 2666 never boot frown.gif

It is easily possible on the Asus A88X-PRO board - as I show on Post 13 of this thread. I'm using GSkill TridentX F3-2666C11(&12)D-16GTXD with the standard XMP timings set at 11-13-13-35-58. Maybe with the XM-PLUS you might take the position that it's there but needs to be tried for and try looser timings - say, Cas12 - and bump the volts up to - but not over - 1.7V.
Edited by Himo5 - 4/4/14 at 2:05am
post #507 of 1332
Im using 2400Mhz CL10-12-12-32.

Wow 2666Mhz... i want it! hehe. Maybe your motherboard is prepared but is imposible for me frown.gif
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post #508 of 1332
Speaking of RAM's... what's a good one to get for this chip?
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post #509 of 1332
My earlier OC attempt that focused on tight RAM settings resulted in a "MEMORY_MANAGEMENT" BSOD, so I've got to start loosening the timings. If I should increase the DRAM voltage, let me know what the maximum safe-ish setting would be while keeping the speeds in mind. Also, I have an 840 Pro and I'm trying to mess around with Magician, but that shouldn't have anything to do with memory_management, except indirectly if I can get RAPID to detect the drive--it would increase memory usage. I'll start doing the stress tests once I get RAPID to run without crashing. Not sure what to start loosening first.
Here's the settings in spreadsheet form:
https://docs.google.com/spreadsheet/ccc?key=0ApzIz1YSh_e7dDR0QV8xZHJhWmpnaTd4NHR1dTJWdlE#gid=1 Warning: Spoiler! (Click to show)
Quote:
Originally Posted by joeybuddy96 View Post

After my earlier post with two sticks http://www.overclock.net/t/1460028/amd-kaveri-a10-7850k-overclock-guide/440#post_21957956, I decided to do the same thing with four sticks.
Notes that are the same as with the previous testing: Warning: Spoiler! (Click to show)
Here are my settings with two sticks of 2400MHz 8GB Team Xtreem on an Extreme6+ with a 7850K, stock heatsink, and a XL R2 case (I left the side cover off for testing since I wanted to be able to see the error codes). Keep in mind that none of this is under load--it's idle in the UEFI, without an OS installed. It more accurately represents the maximum the parts can achieve with stock settings. I haven't gotten to OC'ing my GPU, so that's going to affect thermals too.
ASRock UEFI settings (read from top to bottom matching the format of the UEFI):
CPU OC Mode
4400MHz
Manual
101
Disabled
Disabled
Manual
44 (Returned after leaving the system at the UEFI to find it locked up with Dr. Debug error code 0d, so I lowered it to 44.)
Internal
1.45V
0V
x10
1.2875V (got a screen flicker on transition into the UEFI at 1.275V, and after another 0d, this was one of the settings I brought back up.)
Auto
Auto
XMP 1.3 Profile 1
DDR3-1866 (50'd on previous settings copied from post #447 on 2400 and 2133; 4F'd on 1903 and 1884; the DDR3 can be indirectly set higher than 2400MHz by raising the APU/PCIE Frequency)
1.66V (I don't see any reason to go lower. That's its factory rating--if it dies, it won't be because of the voltage. Update 3: after I came back to a 0d, this was one of the settings I put back to its higher setting for stability.)
5 (ASRock's minimum setting) 8 (C7'd at 7) 9 (C7'd at 8; tried it with 31 tRAS and 43 tRC and got the same result) 8 (4F'd at 7) 15 (ASRock's minimum setting) 2T (34'd at 1T) 25 (4F'd at 24; also stable when lowered along with tRAS to 26 (RAS to CAS Delay) + (RAS Cycle Time) + (2 clock cycles))) 5 (ASRock's minimum setting) 300ns (C7'd at 160ns; The Extreme6+ doesn't allow settings other than the pre-defined increments) 4 (Again, ASrock limitation; it cannot be set lower than 4) 5 (06'd at 4) 4 (the Extreme6+ doesn't allow settings lower than 4) 12 (ASRock's minimum setting)
Temperatures average CPU 63C and M/B 34C.

Here are my system specifications. Note that Sheet 2 is the relevant page.
https://docs.google.com/spreadsheet/ccc?key=0ApzIz1YSh_e7dEZYb3RORFZxU21jUDh0MWRRSkhhcUE&usp=sharing

Edited by joeybuddy96 - 4/5/14 at 9:43pm
post #510 of 1332
Quote:
Originally Posted by os2wiz View Post

It may be bold but it is true. Canardpc means absolutely nothing. It does not tell you if you are utilizing all 4 cores, it doesn't tell you that you can maintain the speed under full load with stability. I stand by what I say until someone provides full documentation proving stability with prime 95 mixed blend and either OCCT with AVX or IBT /AVX. 4.7 is no cake walk. Keep hallucinating. By the way the Intel-made water cooler is pathetic making your claim all the more unlikely.
I found most of the links to those stress testing programs, but IBT is glitched for all AMD processors, isn't it?
Here's the link to prime95:
http://www.mersenne.org/download/index.php
Here's the link to OCCT with AVX:
http://www.ocbase.com/index.php/download
Link to IBT / AVX that works with AMD processors:
?
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