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post #13391 of 15950
Quote:
Originally Posted by djgar View Post

3800 is at the very edge of BW-E cache speed. If what you're calling vring is your vcache it is way too low for that cache speed. I had to give 1.39 vcache for cache speed around 3800.

Oh, it's Broadwell-E, I thought it was a 5930k or something. Yeah, you need lower cache speeds than 4GHZ. Sorry. frown.gif

Edit: Never worked with those, my advice is really only good for Haswell-E.
    
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post #13392 of 15950
Quote:
Originally Posted by KedarWolf View Post

Yeah, try cache manually set at 40 ratio and 1.2v, and you may be able to get your CPU voltage down, for 4.3 you should need 1.25V highest, it may be more with cache or other settings causing stability. I'd try 4.3GHZ CPU at 1.25v max but more likely it would be stable 1.2v-1.25v., 4GHZ cache at 1.2 max, then see if your stable. If your not getting freezes with no reboots then you are good, if you're getting blue screen BSODs THEN try increasing your CPU voltage.

I'll link my post for my 5960x at 4.7/4.4, I'd be really surprised if you need the same voltages for 4.3/4.0. redface.gif And see my sig bottom of page for quick reference to voltages you can try, well, maybe except the RAM voltages, that depends on the kit but try XMP settings for RAM for now, should be okay until you get rest stable.

http://www.overclock.net/t/1605951/5960x-at-4-7ghz-cache-at-4-4ghz-decent-voltages-g-skill-8x4gb-3000-ddr4-at-3200mhz-bios-screenshots#post_25369321

1.25v for 4.3 sounds way to low for broadwell-e, isn't it? I've read that 75% of chips would do 4.3 at 1.35v, a few percentage under and a few over. So I guess I got unlucky with mine...
post #13393 of 15950
Quote:
Originally Posted by r0l4n View Post

1.25v for 4.3 sounds way to low for broadwell-e, isn't it? I've read that 75% of chips would do 4.3 at 1.35v, a few percentage under and a few over. So I guess I got unlucky with mine...

4.2GHz isn't too bad for BW-E, it's about on par with a 4.4GHz HW-E chip, and that's a decent overclock. As long as it isn't causing any performance issues, enjoy the system. Also what are your temps like?
post #13394 of 15950
Question?
Wouldn't Haswell-E be better in actual use than a same number of core Broadwell-E if you're getting a much higher CPU and cache overclock even though the memory may run a bit slower?
    
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post #13395 of 15950
Quote:
Originally Posted by KedarWolf View Post

Question?
Wouldn't Haswell-E be better in actual use than a same number of core Broadwell-E if you're getting a much higher CPU and cache overclock even though the memory may run a bit slower?
Much like the IMC was improved on Broadwell-E to allow RAM to work better at faster speeds than on Haswell-E, I believe the IPC was also improved slightly. It wasn't just a node shrink.
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post #13396 of 15950
Quote:
Originally Posted by r0l4n View Post

I meant 2800, sorry, which is the stock cache speed.

I would then try starting with the 1.1 auto is giving you and go up in 0.01 steps until you hopefully stop freezing. For BW-E avoiding over 1.35v for 24/7 use seems to be the wisest.
post #13397 of 15950
Quote:
Originally Posted by r0l4n View Post

1.25v for 4.3 sounds way to low for broadwell-e, isn't it? I've read that 75% of chips would do 4.3 at 1.35v, a few percentage under and a few over. So I guess I got unlucky with mine...

Yeah, sorry, I thought you were talking about Haswell-E. frown.gif
    
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post #13398 of 15950
Quote:
Originally Posted by Desolutional View Post

4.2GHz isn't too bad for BW-E, it's about on par with a 4.4GHz HW-E chip, and that's a decent overclock. As long as it isn't causing any performance issues, enjoy the system. Also what are your temps like?

Cores sit between 60 and 70 degrees during stress tests, running right now 4125 at 1.31v in the 125 strap (XMP profile), cache at 3125 and 1.1v.
Quote:
Originally Posted by djgar View Post

I would then try starting with the 1.1 auto is giving you and go up in 0.01 steps until you hopefully stop freezing. For BW-E avoiding over 1.35v for 24/7 use seems to be the wisest.

The chip is stable at stock, I'm not so interested in overclocking the cache after all, just the core to start with.
post #13399 of 15950
Quote:
Originally Posted by r0l4n View Post

Cores sit between 60 and 70 degrees during stress tests, running right now 4125 at 1.31v in the 125 strap (XMP profile), cache at 3125 and 1.1v.
The chip is stable at stock, I'm not so interested in overclocking the cache after all, just the core to start with.

I was under the impression you were freezing at your current settings. If not then nothing to fix thumb.gif
post #13400 of 15950
Quote:
Originally Posted by djgar View Post

I was under the impression you were freezing at your current settings. If not then nothing to fix thumb.gif

Actually, I realized that adaptive voltage in the vring does't seem to work, I set 1.200 in the bios and it reads 1.100 in windows (using AI Suite for example). Mmy main objective is finding the max stable overclock for the core, leaving the rest of the variables at stock (mem, cache). Anyway, under those circumstances, I don't seem to be able to get anything over 4200 using sensible voltages (<1.4v).
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