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post #1211 of 2792
Quote:
Originally Posted by Silent Scone View Post

Not sure bud. Nice! Have seen some really good overclocks with the ripjaw stuff. Good ram.
Was bored earlier and re-run Cinebench in Tri channel. 1.44v through CPU @ 130BCLK for 4.81. Eeek. Warning: Spoiler! (Click to show)
4 points faster than my friends 3930 @ 5Ghz mind you.

Should be higher with quad channel thumb.gif

But hey - that chip really needs 1.440 for 4.8GHz? Never have had mine above 1.408, V high LLC (4.85GHz)
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post #1212 of 2792
Quote:
Originally Posted by Jpmboy View Post

Should be higher with quad channel thumb.gif

But hey - that chip really needs 1.440 for 4.8GHz? Never have had mine above 1.408, V high LLC (4.85GHz)
It's probably more like 1.41-2 but I flashed recently and lost my presets. Only ran it for a few minutes. Wouldn't dream about running it for long periods. I like my cpu tongue.gif

That's the highest frequency I've managed on this chip though.

Edit: Found all my old profiles, It's actually 1.410 I need for 4.81 smile.gif (That is the highest I can get out of it though)
Edited by Silent Scone - 4/20/14 at 10:39am
post #1213 of 2792
Quote:
Originally Posted by Silent Scone View Post

It's probably more like 1.41-2 but I flashed recently and lost my presets. Only ran it for a few minutes. Wouldn't dream about running it for long periods. I like my cpu tongue.gif

That's the highest frequency I've managed on this chip though.

Edit: Found all my old profiles, It's actually 1.410 I need for 4.81 smile.gif (That is the highest I can get out of it though)

4.8 on an IB-E is very ..snappy! thumb.gif
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post #1214 of 2792
Well, I just sold my 3930K to a friend of mine and decided to pick up a 4930K this go around.

I haven't started OCing yet. Just reading up on these 4930Ks and trying to get a feel for them.

Anybody who went from a 3930K to a 4930K, how do you find the voltages compare between the two? I only ask because in theory, the 4930K should require less voltage, correct? It looks like most people are pushing these 4930Ks just as far as the 3930Ks (1.4v+) though.

Also, have there been any reports of accelerated degradation caused by VTT and VCCSA values above 1.2v with Ivy-E, or was this only a problem with SB-E?
post #1215 of 2792
I wouldn't use anymore than 1.2v for 24/7. Maybe up to 1.3v for short periods...

Obviously being smaller process they're more prone to degradation, where as you could put 1.5v through SBE for short periods, I wouldn't recommend doing the same on IVYE. I've spoken to users who've had these on LN2 and word is these chips do degrade at a rate we've yet to witness at voltages 1.45v and up.
Edited by Silent Scone - 4/21/14 at 1:41pm
post #1216 of 2792
Yes, 4930K needs considerably less voltage than 3930K did. HOWEVER, the oc ceiling is also lower. The voltage-to-clock curve is steep. At stock speed, IB-e is incredibly efficient, often >1.0v. Once you get above 4.2 ghz range, it ramps up fast (which is why you don't see many 4930K's able to achieve >4.8ghz). You might be able to do 4.4ghz at 1.3v, but it's entirely possible you'd then need >1.5v to do 4.6ghz.

I haven't heard many reports of degradation, except in cases of extreme clocking where it is to be expected. I've had mine clocked at 4.6ghz ~1.35v for 6 months 24/7 and it's still purring like a kitten.

I've heard that IB-e can take a lot more VCSSA than SB-e could, up to the 1.4v range. Personally, I'd research that carefully before taking that as fact.
VTT is just as sensitive on IB-e if not more so than SB-e.
post #1217 of 2792
Thanks Silent Scone and chrisnyc75, this is just the information I'm looking for.

I think I'll start by manually setting voltage to 1.2 and see how far that will take me. Maybe I'll try pushing it a bit more once I get a feel for this particular chip and how decent a clocker it is.

I've always preferred efficiency and low voltage overclocks over trying to squeeze out that last bit of performance.
post #1218 of 2792
Quote:
Originally Posted by Jpmboy View Post

4.8 on an IB-E is very ..snappy! thumb.gif
Hey bud, what are you running for vtt and vccsa voltage for strapping 4.875 and 2666? I've finally gotten it somewhat stable on my newer chip and the R4F, but vtt and vccsa voltage seem quite high.
    
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post #1219 of 2792
Quote:
Originally Posted by hotrod717 View Post

Hey bud, what are you running for vtt and vccsa voltage for strapping 4.875 and 2666? I've finally gotten it somewhat stable on my newer chip and the R4F, but vtt and vccsa voltage seem quite high.

I needed VTT=1.25V and vsa=1.15V for 2666, but haven't spent alot of time tuning it. Seemed high to me at the time too. I now run 2200 8-10-10-21-91-1T @ 1.6V and the speed is very good. Not 2666, but very close according to AID64 memory bench. vtt=1.05, vsa=0.995
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post #1220 of 2792
1.1625v & 1.115v here for 2666C9 ultra tight (twcl5) or 2800c9 slightly more relaxed.

SS - If using software to measure voltage at least change cpu-z to 1.69. wink.gif

For CB run it in diagnostic mode (run->msconfig) and in realtime (task manager/process (CB)/right click/priority)
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