flanker Posted May 26, 2016 Posted May 26, 2016 mine chip got 4.6 GHz with 1.55V and only at -50C at pot (CB seems around -90C) Quote
The Stilt Posted May 26, 2016 Posted May 26, 2016 mine chip got 4.6 GHz with 1.55V and only at -50C at pot (CB seems around -90C) SuperPI 32M pass? Quote
flanker Posted May 26, 2016 Posted May 26, 2016 SuperPI 32M pass? I will try to find screen if I have it after I will be at home. Quote
flanker Posted May 26, 2016 Posted May 26, 2016 I found my 1.6V results now Im sure, I tested it also with 1.55V and same settings ( I tried many combination how to get higher BCLK, lowr voltages at CPU/NB included) Quote
Massman Posted May 27, 2016 Author Posted May 27, 2016 I wonder if it's easier to get high frequency in Windows 7. My chip can only do 120MHz Pifast 1/100 runs or so (usually stuck at 118 MHz). @The Stilt: I'm quite confident that the super high Vcore is only to get the high BCLK stable. I can run 117x38 at 1.5v with ~ 10c 32M stable, but had it up at 1.7V for my final runs. It's really hard to tell where the X4 845 would be if unlocked. The same thing applies on Excavator too, since the DDR3 controllers on Steamroller and Excavator are identical. The only major difference is that on Excavator the PMU SRAM interface is actually working, which makes it possible to train and configure the memory parameters correctly, unlike on Steamroller. Sad stuff The PMU communication should (not sure about public docs) be explained in BKDG, but it is quite a complex procedure. Also with Excavator you need to take into account that it is purely a mobile chip. You need to write the parameters in a right context (i.e with correct MemPS and NBPS targets). It is certainly possible on Excavator, but it is a bunnying nightmare to do. Not worth doing, IMO. Do what you can from the bios These chips are not any kind of priority for me and I've been working on other stuff instead. Check you EDC reading in recent HWInfo beta versions, could come handy Thanks for the info! I wonder if the training is happening properly, actually. @l0ud_sil3nc3 mentioned this already, but on my end I see no actual benefit from dialing in timings from the BIOS. In fact, apart from tCL and tRCD I see no change in performance or stability adjusting any of the other timings. Usually adjusting the timings makes things worse performance wise. I guess I'm going to pack things up for now and wait for Bristol Ridge to appear. But seriously, WTF AMD ... Quote
The Stilt Posted May 27, 2016 Posted May 27, 2016 I wonder if it's easier to get high frequency in Windows 7. My chip can only do 120MHz Pifast 1/100 runs or so (usually stuck at 118 MHz). @The Stilt: I'm quite confident that the super high Vcore is only to get the high BCLK stable. I can run 117x38 at 1.5v with ~ 10c 32M stable, but had it up at 1.7V for my final runs. It's really hard to tell where the X4 845 would be if unlocked. Thanks for the info! I wonder if the training is happening properly, actually. @l0ud_sil3nc3 mentioned this already, but on my end I see no actual benefit from dialing in timings from the BIOS. In fact, apart from tCL and tRCD I see no change in performance or stability adjusting any of the other timings. Usually adjusting the timings makes things worse performance wise. I guess I'm going to pack things up for now and wait for Bristol Ridge to appear. But seriously, WTF AMD ... The training and timings work perfectly on Excavator as long as AGESA receives the correct parameters to use (from the bios). If the timings are not working as expected, I would assume that's because of bios bugs. The AGESA required by FM2+ Carrizos is are cluster *uck. The same code has to support five different chips at the same time (Trinity, Richland, Kaveri, Godavari, Carrizo)... AGESA itself of course has different paths for all of these, however they are pretty hard to implement from the bios side. So I would assume that it is more a issue with the bios, rather than with anything else. Quote
flanker Posted May 27, 2016 Posted May 27, 2016 @Massman: did you tried for higher BCLK change the "APU 1.2V" settings? This helped at my side. 1 Quote
Massman Posted May 27, 2016 Author Posted May 27, 2016 Yes, and sometimes it helped. But not consistently. Quote
The Stilt Posted May 27, 2016 Posted May 27, 2016 The 1.2V voltages are effectively PCI-E & DRAM PHY voltages. Shouldn't matter. Of course one could put the contacts in good use and ask them to replace the A88X FCH with A85X one You'll lose the FCH USB3s and need to modify the bios for different AHCI roms but that's ok IMO. 1 Quote
Radi Posted July 29, 2016 Posted July 29, 2016 how i can have the x38 multiplier in xp ? in bios i have only 35 i desabled two core but i don't have x38 ... thanks Quote
l0ud_sil3nc3 Posted July 30, 2016 Posted July 30, 2016 how i can have the x38 multiplier in xp ? in bios i have only 35 i desabled two core but i don't have x38 ... thanks Boot with 108 base clock then raise in OS the rest of the way. I think even 110 or 109 results in x35 multi iirc. Quote
Radi Posted July 30, 2016 Posted July 30, 2016 Il have try at 105 but non x38 ... I'm for 2 weeks in holiday il retry Wen i come back Quote
newlife Posted August 18, 2016 Posted August 18, 2016 Finally got a 845 so I should finally be able to join Quote
newlife Posted August 19, 2016 Posted August 19, 2016 Just been doing some testing on a Gigabyte F2A88X UP4 and with 2 cores in xp it idles at 38x and with a bit of a stuff around I got 114 bclk running on ambient cooling Oh and what cb/cbb have you guys been getting? 1 Quote
Radi Posted August 19, 2016 Posted August 19, 2016 Just been doing some testing on a Gigabyte F2A88X UP4 and with 2 cores in xp it idles at 38x and with a bit of a stuff around I got 114 bclk running on ambient cooling Oh and what cb/cbb have you guys been getting? damned !! maybe it's my xp .... i have try many things but no x38 for me ... Quote
flanker Posted August 20, 2016 Posted August 20, 2016 newlife: I got issue with BCLK over 114 If I remember right (for SUperpi runs). Temps were OK, I hold the CPU around -40C. But CPU can get higher because BLCK :-/(at air I got similar clock, so the temps were not problem) Quote
Massman Posted August 20, 2016 Author Posted August 20, 2016 114-ish with 38x ratio seems accurate with ambient cooling. Quote
mickulty Posted August 20, 2016 Posted August 20, 2016 Guess I should have another go at in-os overclocking, my asrock A88M-G/3.1 won't boot above 106mhz (which is a setting of 105mhz in the bios because asrock). Quote
newlife Posted August 20, 2016 Posted August 20, 2016 114-ish with 38x ratio seems accurate with ambient cooling. I'm having no issues with 116.5 (117 in bios) on ambient cooling and can get up loop 8 with mem at 2380mhz Quote
Radi Posted August 22, 2016 Posted August 22, 2016 hi newlife . can you share here your.bat please ? the link on your submit is dead . thanks Quote
newlife Posted August 22, 2016 Posted August 22, 2016 Here you go and as I said earlier paste with msrtweaker exe and it will set p2-p0 to max multis plus it only works with xp https://www.dropbox.com/s/g9zzaj59qln67ya/Carrizo%20Auto%20Multi%27s.bat?dl=0 1 Quote
flanker Posted August 23, 2016 Posted August 23, 2016 congratulation to the new record! Awesome man! newlife`s SuperPi - 32M score: 9min 58sec 875ms with a Athlon X4 845 Quote
superpatodonaldo Posted March 12, 2018 Posted March 12, 2018 good morning gentlemen I am not able to use win XP, I've got a x4 845 on a crossblade, I can go in win XP only in safe mode; where am I wrong? Quote
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