superpatodonaldo Posted February 29, 2020 Posted February 29, 2020 Does anyone have some tips or improvement of A2 B-die on X299OCF? I am able to run just 3733 12 12 @ around 1,75v, nothing above Quote
aerotracks Posted February 29, 2020 Posted February 29, 2020 Same results here, A2 overclocking is rubbish on my X299 OCF. It's quite strange since older Z170 MOCF is fine with A2. Quote
Splave Posted February 29, 2020 Posted February 29, 2020 (edited) I can offer some advice maybe. A2 likes higher vdimm. 1.85-1.95 here. Can you post which memory and your settings voltage and timings please. A2 actually works better than A0 for me ? Edited February 29, 2020 by Splave 2 Quote
aerotracks Posted February 29, 2020 Posted February 29, 2020 (edited) 43 minutes ago, Splave said: I can offer some advice maybe. A2 likes higher vdimm. 1.85-1.95 here. Can you post which memory and your settings voltage and timings please. I tried the 4000C12 profile and G.Skill RGB 4600C18 1.85-2.05V, no post. With A0 this preset can post. Edited February 29, 2020 by aerotracks 1 Quote
aerotracks Posted February 29, 2020 Posted February 29, 2020 For me Kaby-X, I tried with 2x 7740x and no more than 3733 C12. 1 Quote
gkmltd Posted February 29, 2020 Posted February 29, 2020 (edited) 3 hours ago, Splave said: Ok which bios Hey Allen Can u upload the 1.80b bios? Tnx Edited February 29, 2020 by gkmltd Quote
superpatodonaldo Posted March 1, 2020 Author Posted March 1, 2020 (edited) Thank you @Splave As @aerotracks my A2 kit (4266 19-19-19 g.skill tridentz rgb) doesn't like 4000 12-12 profile, instead A0 kit 3200c14 can manage that profile. Cpu is 7740X Edited March 1, 2020 by superpatodonaldo Quote
sabishiihito Posted March 2, 2020 Posted March 2, 2020 (edited) Pulled out the X299 OCF + 7740x and tested some medicre A2 B-die in the guise of XPG D80 3600C17. P1.90 bios, passes 32M wazza. Hope this helps. Edited March 2, 2020 by sabishiihito 1 1 Quote
l0ud_sil3nc3 Posted March 2, 2020 Posted March 2, 2020 Never tried any A2 on X299, Kaby or Sky X but I remember even with A0 on Kaby X 4133 12-11 wasn't exactly easy at least on early bios's. Glad to see you guys testing this since I think most of not all future platforms will favor A2. Quote
superpatodonaldo Posted March 2, 2020 Author Posted March 2, 2020 @sabishiihito really need high vccsa and vccio? Quote
sabishiihito Posted March 2, 2020 Posted March 2, 2020 8 hours ago, superpatodonaldo said: @sabishiihito really need high vccsa and vccio? Depends on the chip really, and I just set high so I wouldn't have to keep tweaking volts. 1 Quote
Splave Posted March 2, 2020 Posted March 2, 2020 also vdimm is real on x299 ocf so mocf is +0.06-+0.08 from bios set also enable xmp is needed for over 3800+ on some sticks helps with training 1 Quote
superpatodonaldo Posted March 2, 2020 Author Posted March 2, 2020 Strangely today can boot and close geek3 @ 3866 12 12 profile, maybe tomorrow 4000 12 12 capable? ?? Quote
aerotracks Posted March 2, 2020 Posted March 2, 2020 Stability goes down with more VDIMM. XMP is enabled. 1.85V VDIMM 1866MHz 12-11 max stable 2.00V VDIMM: 1666MHz 12-11 max stable 1 Quote
Splave Posted March 2, 2020 Posted March 2, 2020 On 2/29/2020 at 1:59 PM, gkmltd said: Hey Allen Can u upload the 1.80b bios? Tnx https://drive.google.com/open?id=1pYblQ0Qg_C1sMRv0g9pwdbUZ0RSvVPll 1 hour ago, aerotracks said: Stability goes down with more VDIMM. XMP is enabled. 1.85V VDIMM 1866MHz 12-11 max stable 2.00V VDIMM: 1666MHz 12-11 max stable Can you try 4/4/7/4/5/5 on the bottom thirds? TRFC 240 need TCWL 9 because its throwing off the RTL too loose. Sometimes A2 needs IOL 6/7 and a little different RTL. I will dust my kaby off an join you tomorrow. I think the main issue is the bios, can you try 1.20 ? Quote
aerotracks Posted March 2, 2020 Posted March 2, 2020 31 minutes ago, Splave said: Can you try 4/4/7/4/5/5 on the bottom thirds? TRFC 240 need TCWL 9 because its throwing off the RTL too loose. Sometimes A2 needs IOL 6/7 and a little different RTL. I will dust my kaby off an join you tomorrow. I think the main issue is the bios, can you try 1.20 ? Thank you, I will try tomorrow. Another thing, just using BIOS defaults and then loading XMP I can train 4360 and no higher. I then looked in to QVL and supported 4600 kits are all A0 while fastest A2 set is 4333 speed. Coincidence or is this max MHz for A2 on the board? Quote
superpatodonaldo Posted March 3, 2020 Author Posted March 3, 2020 (edited) Yesterday test A2 3866 12 12 Edited March 3, 2020 by superpatodonaldo Quote
superpatodonaldo Posted March 3, 2020 Author Posted March 3, 2020 and other old tests with an other A2 kit on X299OCF 44xx 14 13 2 Quote
aerotracks Posted March 3, 2020 Posted March 3, 2020 I tried P1.20 First 12-11, clocks still drop with more voltage. 1.85V VDIMM 1866MHz, 2V VDIMM 1800MHz Then I switched to TRCD 12: 2V 1933MHz 12-12 2V 2000MHz 16-12 Going from 1933MHz to 2000MHz... no post with 1T, no post with C12,13,14,15 1 Quote
Splave Posted March 3, 2020 Posted March 3, 2020 ok how much SA and IO are the memory good on other boards/platforms? Quote
aerotracks Posted March 3, 2020 Posted March 3, 2020 (edited) IO&SA 1.25V, I tried more and less volts and it doesn't seem to be a factor. I cross checked mems yesterday and they are working ok, this is my working preset from Z270 Apex Edited March 3, 2020 by aerotracks Quote
Splave Posted March 3, 2020 Posted March 3, 2020 could be the IMC Ive had some that cant do 4k at all. Was A0 working fine for you or also no 4k ? will join you shortly Quote
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