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The i5-760 OC Club - Page 149

post #1481 of 1926
well im currently at 4.0 ghz but at low voltage did many prime95 test and intel burns and seems to be stable no bsod pretty weird cause im seeing ppl at 1.35vcore...
if put it to 4.2 ghz but bsod at 1.25 vcore....

post #1482 of 1926
I don't know why people use Passmark as a judge of performance. It is a rubbish piece of trash. 3DMark or PCMark are much reliable IMO.

This is what I am talking about
http://www.videocardbenchmark.net/high_end_gpus.html

Lol at GTX 580 being better than 7950, GTX 660 Ti and as good as GTX 760. It is almost as good as 7970 which is nonsense. Also GTX 770 as good as R9 290 really? these cards are not even in the same league.
Quote:
Originally Posted by HeMTeC View Post

well im currently at 4.0 ghz but at low voltage did many prime95 test and intel burns and seems to be stable no bsod pretty weird cause im seeing ppl at 1.35vcore...
if put it to 4.2 ghz but bsod at 1.25 vcore....


Lynnfield doesn't scale well with voltage vs clock past 4 GHz, unfortunately. You might need 1.3V for 4.2 GHz for 100% stability which is still a pretty good voltage and only golden chips can do that especially on air.
Actually 4 GHz with only 1.2V is an awesome OC if you are sure it is 100% stable. The extra 200 MHz won't give you much performance increase IMO.
Edited by HeadlessKnight - 3/30/14 at 3:40am
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post #1483 of 1926
Quote:
Originally Posted by HeadlessKnight View Post

I don't know why people use Passmark as a judge of performance. It is a rubbish piece of trash. 3DMark or PCMark are much reliable IMO.

This is what I am talking about
http://www.videocardbenchmark.net/high_end_gpus.html

Lol at GTX 580 being better than 7950, GTX 660 Ti and as good as GTX 760. It is almost as good as 7970 which is nonsense. Also GTX 770 as good as R9 290 really? these cards are not even in the same league.
Lynnfield doesn't scale well with voltage vs clock past 4 GHz, unfortunately. You might need 1.3V for 4.2 GHz for 100% stability which is still a pretty good voltage and only golden chips can do that especially on air.
Actually 4 GHz with only 1.2V is an awesome OC if you are sure it is 100% stable. The extra 200 MHz won't give you much performance increase IMO.


Yer that was what i was thinking 4ghz is enough for me and seems to run stable no bsod nothing so im happy so far. with intelburntest at goes max 69c degrees. no errors. same as prime runs and stays running.

well best 10 euro's if ever spend on a cooler imo!!!

well only thing left is getting a new gpu and im set for a couple of years saves me money by oc 'ing this chip
Edited by HeMTeC - 3/30/14 at 5:27am
post #1484 of 1926
Quote:
Originally Posted by HeMTeC View Post



well only thing left is getting a new gpu and im set for a couple of years saves me money by oc 'ing this chip

Yup. i5 760 especially when OCed to 4 GHz+ and combined with a decent video card, is a very solid rig for the next few years smile.gif. enjoy your OC.
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post #1485 of 1926
platinum chip!....awesome..
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post #1486 of 1926
Hey popping in to say my pc is still crunching at 4ghz core-1.24v imc-1.28 200bclk x 20 3600/7200qpi. Still have 32gb Kingston ECC(elpida chips) ram at 1600 cl10 1.5v. On this rig. Speedstep : Disabled. C-HALT STATE : Disabled. C-state : Auto.

I've never tried to screw around with oc settings like anyone else. I literally go to my estimated max value, then work from there, usually oc a pc fully stable in a few minutes, obviously this excludes stress testing.

I've used many odd settings on peoples pc's, sometimes the ram just limits their pc from going beyond 3.8ghz or whatever, due to the ram only being able to reach 1400 or whatever odd value I had to use.

The first time I ever overclocked this chip I couldn't even go 201 bclk at lowest multi and 1.25v but I could boot at 200bclk x 20 1.18v. Just don't try to go above 200bclk if it doesn't work the first time at lowest multi. I have seen pretty much every 760/750 chip do that, so this information should be quite valuable.

Aircooling + highest bclk + highest multi + highest qpi at around 1.25 volts, imc volt is usually around 1.23 - 1.3v "Have clocked a few 750/60's" (According to Intel, depending on amount, speed and voltage of RAM the more of whatever the more strain on imc. "apparently"). thumb.gif
post #1487 of 1926
been wondering what QPI is and what it's relation to OC-ing would be....
can anyone explain or provide a link that explains it in simple terms?
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post #1488 of 1926
Quote:
Originally Posted by cephelix View Post

been wondering what QPI is and what it's relation to OC-ing would be....
can anyone explain or provide a link that explains it in simple terms?

Well it's basically the bus, which is bandwidth cpu speed.

Wiki: "Intel describes the data throughput (in GB/s) by counting only the 64-bit data payload in each 80-bit "flit". However, Intel then doubles the result because the unidirectional send and receive link pair can be simultaneously active. Thus, Intel describes a 20-lane QPI link pair (send and receive) with a 3.2 GHz clock as having a data rate of 25.6 GB/s. A clock rate of 2.4 GHz yields a data rate of 19.2 GB/s. More generally, by this definition a two-link 20-lane QPI transfers eight bytes per clock cycle, four in each direction."

The rate is computed as follows:

Wiki's example :
3.2 GHz
× 2 bits/Hz (double data rate)
× 16(20) (data bits/QPI link width)
× 2 (unidirectional send and receive operating simultaneously)
÷ 8 (bits/byte)
= 25.6 GB/s
Edited by S02 - 4/2/14 at 5:20am
post #1489 of 1926
Evga P55 SLI
74 Bios
EvgA 9800gtx+ in SLI
Antec BP550 PSU
4GBx2 Corsair XMS 1333 at 9-9-9-24 CDM 1
2:6 1087zmhz 1.5v had to underclock it.
I think its got Cooler Master h212
fan

Vdroop on
Vcore 1.225
Vtt 1.15
pch auto 1.05
pll auto 1.80
HWCaps disabled
"Cs" disabled
Turbo disabled
Speed disabled
MCH strap auto
181X21 =3.8007.2-4 (190x20 requires 1.2125vcore and 1.225vtt)
But Under IBT Very High or MAX Settings(cuz Im doing other stuff while its running)
Vcore 1.176
Vtt is 1.13-1.14
Ram 1.48mhz
The whole system idiles higher than under load.
See the pic with the Test finished at 1.2 vcore. I guess this is what Vdroop does enabled? Why?

Temps
Ambient temp 19c
IBT Veryhigh 51c Cores 56C
IBT Max 57c Core 62c

I would play more with the Ram but past exp. tells me its a pain in the ass, and 1087 is good enough for me.
Im sure I could get this up into the 4.0 range. Stock vcore is 1.17 underload and 1.05vtt.

Only useing this for gaming. 10 IBT is enough for me until i get BSOD. I've run 5 passes before at Max settings too.




Edited by Xeno1 - 4/10/14 at 11:58am
post #1490 of 1926
I just did a run of IBT. Your gflop count seems too low "except maybe the very first one", like as if not overclocked (I get 53+- glfops at 200x20 4ghz, while running music and opening occt, plus firefox) ... Ehrm are you overclocking with the software, it might not be working so well as with straight up bios. It might also not be able to read properly while test is running, although I doubt it. Have you tried prime, orthos or occt yet? Also, does c-state give you problems somehow? I've kept my c-state on auto for years so am wondering.
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