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AMD Kaveri A10-7850K Overclock Guide - Page 45

post #441 of 1332
I have an Extreme6+ and 4x8GB sticks of Team Xtreem. I can't get it past 1866MHz. My Supernova melted when I tried to set it to NB 1.3V and 1.8V DDR3, but I got a new one through EVGA's RMA. I've tried loosening timings, but without a complete chart for timings, it's possible there's a desync or timing failure. I set the NB to 2000MHz at 1.3V, and it's stable with its current 1866MHz settings. Since the sticks can get to 2133MHz on a 6800K Gigabyte platform, and since others in the thread have gotten the EX6+ to 2400MHz with 4GB sticks, I'm thinking the reason is that the 7850 can't handle 8GB sticks at greater than 1866MHz. I've been trying to get this to work for like ten hours. frown.gif
post #442 of 1332
For a 24/7 build, would it be better to run my little brothers A10-7850K build using 2133mhz 11-11-11-27 @ 1.5v, 10-10-10-27 @ 1.6v, or 9-12-11-27 @ 1.65v?

All above clocks are tested to be completely stable. There is a very slight performance increase between each timing configuration. I'm not sure if the extra voltage would cause any measurable extra stress on the package over time. I know the newer Intel platforms are more sensitive to ram voltages over 1.5v. I can't find much consensus on the AMD APUs. I'm trying make this as bullet proof as possible for him while being optimized. Opinions?
 
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post #443 of 1332
Quote:
Originally Posted by joeybuddy96 View Post

I have an Extreme6+ and 4x8GB sticks of Team Xtreem. I can't get it past 1866MHz. My Supernova melted when I tried to set it to NB 1.3V and 1.8V DDR3, but I got a new one through EVGA's RMA. I've tried loosening timings, but without a complete chart for timings, it's possible there's a desync or timing failure. I set the NB to 2000MHz at 1.3V, and it's stable with its current 1866MHz settings. Since the sticks can get to 2133MHz on a 6800K Gigabyte platform, and since others in the thread have gotten the EX6+ to 2400MHz with 4GB sticks, I'm thinking the reason is that the 7850 can't handle 8GB sticks at greater than 1866MHz. I've been trying to get this to work for like ten hours. frown.gif
It can it just the NB. What ram? Is it set to 1t or 2t? XMP? 1.8 ram voltage is too high.

I have problems with my 2400 gskills cas 9 even with looser timings than stock.
Quote:
Originally Posted by rebelextrm02 View Post

For a 24/7 build, would it be better to run my little brothers A10-7850K build using 2133mhz 11-11-11-27 @ 1.5v, 10-10-10-27 @ 1.6v, or 9-12-11-27 @ 1.65v?

All above clocks are tested to be completely stable. There is a very slight performance increase between each timing configuration. I'm not sure if the extra voltage would cause any measurable extra stress on the package over time. I know the newer Intel platforms are more sensitive to ram voltages over 1.5v. I can't find much consensus on the AMD APUs. I'm trying make this as bullet proof as possible for him while being optimized. Opinions?

What speed? Did you overclock the NB?


Also wondering if anyone else overclocked cpu setting fluctuate a lot. In cpuz my multi goes from 42 to 35 every couple of seconds running prime. Also the FSB fluctuates a lot too?
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post #444 of 1332
Quote:
Originally Posted by joeybuddy96 View Post

I have an Extreme6+ and 4x8GB sticks of Team Xtreem. I can't get it past 1866MHz. My Supernova melted when I tried to set it to NB 1.3V and 1.8V DDR3, but I got a new one through EVGA's RMA. I've tried loosening timings, but without a complete chart for timings, it's possible there's a desync or timing failure. I set the NB to 2000MHz at 1.3V, and it's stable with its current 1866MHz settings. Since the sticks can get to 2133MHz on a 6800K Gigabyte platform, and since others in the thread have gotten the EX6+ to 2400MHz with 4GB sticks, I'm thinking the reason is that the 7850 can't handle 8GB sticks at greater than 1866MHz. I've been trying to get this to work for like ten hours. frown.gif

Your problem has absolutely nothing to do with 4MB vs 8 GB ram sticks. It has everything to do with using all 4 ram modules. Try two sticks and all should be well. Also no need for 1.3 volts NB at 2000 mhz. Lower it a bit.
post #445 of 1332
Quote:
Originally Posted by drnilly007 View Post

It can it just the NB. What ram? Is it set to 1t or 2t? XMP? 1.8 ram voltage is too high.

I have problems with my 2400 gskills cas 9 even with looser timings than stock.
What speed? Did you overclock the NB?


Also wondering if anyone else overclocked cpu setting fluctuate a lot. In cpuz my multi goes from 42 to 35 every couple of seconds running prime. Also the FSB fluctuates a lot too?

2133mhz for each set of different timings and voltage. I've only adjusted the frequency, timings, and voltage of the memory. Everything else (cpu, nb, etc..) is stock voltage and frequency.
 
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post #446 of 1332
Quote:
Originally Posted by drnilly007 View Post

It can it just the NB. What ram? Is it set to 1t or 2t? XMP? 1.8 ram voltage is too high.

I have problems with my 2400 gskills cas 9 even with looser timings than stock.
What speed? Did you overclock the NB?


Also wondering if anyone else overclocked cpu setting fluctuate a lot. In cpuz my multi goes from 42 to 35 every couple of seconds running prime. Also the FSB fluctuates a lot too?
The NB is set to 2000MHz, 1.3V. I haven't been able to get it to 2200MHz with the voltage at 1.3V, and I haven't seen anyone else set the voltage and speed higher. I'm using two sets of Team Xtreem LV 16GB TXD316G2400HC10QDC01, 4x8GB. 2T. Yes, it has an XMP profile, but it is for DDR3-2400, and I haven't even gotten DDR3-2133 to work. Definitely, 1.8V is too high, as my supernova'd supernova can attest; 1.72V is the highest safe voltage I've seen, although I have seen others run higher voltages past 2.1V (how they did this without melting capacitors in their PSU, I might never know). Is it possible that the CPU multi is fluctuating due to Turbo Core (the auto-overclocking based on application demand)?
Quote:
For a 24/7 build, would it be better to run my little brothers A10-7850K build using 2133mhz 11-11-11-27 @ 1.5v, 10-10-10-27 @ 1.6v, or 9-12-11-27 @ 1.65v?

All above clocks are tested to be completely stable.
Are you using 4GB or 8GB sticks? What motherboard are you using? Could you post your full timings?
Quote:
Your problem has absolutely nothing to do with 4MB vs 8 GB ram sticks. It has everything to do with using all 4 ram modules. Try two sticks and all should be well. Also no need for 1.3 volts NB at 2000 mhz. Lower it a bit.
That's good news and bad news. Means I'll have to trade off capacity for speed for a performance hit in certain applications. I'd probably notice it in texture-heavy games and games with a bunch of objects. I'd also notice it with large file handling programs, and in 3D modeling and fluids simulation. One of the reasons I got 32GB instead of 16GB was so that I could run RAMDisk; 16GB wouldn't be enough to mount an OS and an application. I guess I'll just have to alternate between the four and two depending on what application I need to do. I'll run measurement tests once I have an OS installed, of course. It'll have to do until the 7850 gets higher bandwidth.
post #447 of 1332
I used the same sticks in a Gigabyte FM2 (not FM2+) system, instead of an ASRock system, with a 6800K instead of a 7850K, and was able to get 2133MHz 11-11-11-29 with about 1.6V.
The ASRock board is not flexible when it comes to adjusting certain timings: Write Recovery Time (tWR) has a maximum setting of 16, whereas the 2400 XMP profile specifies 18. It allows Refresh Cycle Time (tRFC) only to be set in pre-defined increments (e.g. 300 ns and 350 ns), instead of what the XMP profile specifies at 315 ns.
With the ASRock, I was only able to get it to boot into 2400 when it had two sticks present. The EX6+ doesn't include a setting for 2600MHz or higher.
Update:
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.
CPU OC Mode
4400MHz
Auto
Auto
Disabled
Disabled
Manual
44 (I've read reviews where raising the multiplier stopped at 44 due to failure at 45, and I've seen others get stable systems at 46, so I'll leave the maximum at 45 and wait to see how it fairs in testing. It's possible that the reason they couldn't get it higher was due to trying to use the iGP. I still haven't started to OC the discrete GPU I have, so I'm going to leave it at 45 so I'll have some room to raise the voltage and speed of the PCIe section. Update 2: 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
DDR3-2400
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.)
8 (got a screen flicker when lower than 8) 10 (3b'd at 9) 12 (3b'd at 11) 10 (4F'd at 9) 23 (when set lower with RAS# Cycle Time, 3b'd) 2T (34'd I think at 1T) 33 (when set lower than 32 with RAS# Active Time, 3b'd; Update 3: raised it to 33 after it 0d'd) 8 (06'd at 6) 300ns (The Extreme6+ doesn't allow settings other than the pre-defined increments) 4 (Again, ASrock limitation; it cannot be set lower than 4) 5 (3b'd at 4) 5 (the Extreme6+ doesn't allow settings lower than 4; Update 3: this is one of the settings I raised back up after a 0d screen lock) 18 (when set to 16, froze in the UEFI with Dr. Debug error code "0C")
Edited by joeybuddy96 - 3/16/14 at 8:47pm
post #448 of 1332
EVERYONE I CREATED A NEW GUIDE WITH GOOD INSTRUCTIONS ON KAVERI HERE:

http://www.overclock.net/t/1474753/official-kaveri-overclock-guide-in-progress/0_50
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post #449 of 1332
Quote:
Originally Posted by joeybuddy96 View Post

The NB is set to 2000MHz, 1.3V. I haven't been able to get it to 2200MHz with the voltage at 1.3V, and I haven't seen anyone else set the voltage and speed higher. I'm using two sets of Team Xtreem LV 16GB TXD316G2400HC10QDC01, 4x8GB. 2T. Yes, it has an XMP profile, but it is for DDR3-2400, and I haven't even gotten DDR3-2133 to work. Definitely, 1.8V is too high, as my supernova'd supernova can attest; 1.72V is the highest safe voltage I've seen, although I have seen others run higher voltages past 2.1V (how they did this without melting capacitors in their PSU, I might never know). Is it possible that the CPU multi is fluctuating due to Turbo Core (the auto-overclocking based on application demand)?
Are you using 4GB or 8GB sticks? What motherboard are you using? Could you post your full timings?
That's good news and bad news. Means I'll have to trade off capacity for speed for a performance hit in certain applications. I'd probably notice it in texture-heavy games and games with a bunch of objects. I'd also notice it with large file handling programs, and in 3D modeling and fluids simulation. One of the reasons I got 32GB instead of 16GB was so that I could run RAMDisk; 16GB wouldn't be enough to mount an OS and an application. I guess I'll just have to alternate between the four and two depending on what application I need to do. I'll run measurement tests once I have an OS installed, of course. It'll have to do until the 7850 gets higher bandwidth.

I'm running 2 sets of 2x4GB @ 2400. If you want to get two sets of RAM stable, you really need to check every timing to ensure they are the same--there's a good chance they wouldn't be (mine were not). Set it to the XMP profile, look at the timings for the "slower" modules, match all timings to that of the slower timings, and even loosen the timings a bit more on both channels if you ask me--using iGPU really focuses on the RAM speed more than the timings, if you ask me. I run it at 1.67 voltage in the BIOS since my mobo seems to undervolt. But that's still no guarantee they'll work--it just does for me.
post #450 of 1332
Hey guys,

I'm having a slight issue with my new build. For one reason or another, I cannot get the 7850 to clock higher than the idle speeds of 1.7ghz. This is regardless of what settings I use on my motherboard. I did have the cpu overclocked to 4.2ghz yesterday and everything was fine. I however decided to go back to default settings as I wanted to run some benchmarks to see how great of an improvement I was truly seeing.

I'm using the MSI A88x-G45 Gaming board along with some Kingston Hyper X Beast sticks that are currently running at 2400mhz with the xmp profile.

I have tried disabling some things like quiet and cool but that hasn't helped me at all.

I'm hoping someone has some thoughts on what I may need to do here.




Thanks
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