Overclocked I5 2500k is this a solid overclock

[residentdean]

First off I used a proglimatech rev.b paired with 3,000 rpm scythe kaze fans for a push pull system for my I5 2500k. In a room that is 74F I am idleing at about 35 c each cores with an overclock of 4.8 mhz. My vcore voltage is 1.43 and it runs stable in prime at the hottest of 64c. Is this a solid overclock?

 

[pule]

yes, that's excellent! if you run prime for hours, do you get any rounding errors?

 

[residentdean]

Nope no errors at all. I did notice however to accomplish a stable 5.0 mhz I had to really push the vcore up and I came to the conclusion that maybe it's not worth it for only 200 more mhz.

 

[pule]

yeah, that is perfectly understandable! How much did you put the vcore up to?

 

[residentdean]

1.43 but i wonder if real temp is really making my temp read correctly because I'm burning a dual layer dvd and my temps say 60c all through the cores and If i were to prime it at this second it would stay at the same temps!. It reads in 30's sometimes at idle but some time it say 60c at idle. They need to make a program that is accurate for the sandy bridge!

 

[residentdean]

Just check my cpu usage and it's at 100% to burn a dual layer cd? I wonder if I should turn the throttle down and make it run @ 4.8 when I need to. Does anyone now how to configure that in the bios?

 

[residentdean]

Never mind I'm an idoit I had prime 95 going while I was burning a dual layer lol

 

[henryvalz]

Impressive....

Next try to run WoW with Prime95 running!

 

[henryvalz]

This is the OC I'm hoping to hit with my 2600k.

48x and 1600 RAM would be a sweet spot, I think.

 

[JackNaylorPE]

Good read here:

http://benchmarkreviews.com/index.php?option=com_content&task=view&id=730&Itemid=38&limit=1&limitstart=9

If running quiet has any interest to you, then I'd make several OC's and save them as separate "profiles" assuming your BIOS provides that feature. Here's what I found OC'ing the 2600k ..... the 2500k will run cooler since it's running half as many cores with no HT.....In the BMR article above for example, the 2500k ran 7C cooler at 4.8 Ghz.

Max Core Temps under (Idle - P95 load)

GHz..... 3.8 ... 4.00 ...... 4.2 ........ 4.4 ........ 4.6 ....... 4.80
Core 1 (51) (31 - 52) (29 - 54) (29 - 56) (31 - 62) (29 - 69)
Core 2 (53) (30 - 54) (30 - 56) (30 - 60) (31 - 66) (28 - 75)
Core 3 (53) (23 - 55) (22 - 57) (22 - 60) (31 - 68) (28 - 79)
Core 4 (51) (29 - 52) (28 - 55) (29 - 57) )31 - 65) (28 - 72)

Core voltages were 1.288 1.344 1.36 1.368 1.368 and 1.408

Again, that's with low speed fans on a Thermalright Silver Arrow .... On all but the 4.8 Ghz setting, fans were running at 900 rpm. At 4.8 they went up a little bit but no where near their 1300rpm limit.

Here's a test for comparison with one Delta AFC1212D (113CFM advertised) fan

Prolimatech Super Mega 59.4
Thermalright Silver Arrow 55.8

I have set up a "everyday" 24/7/365 profile to run at 4.4 Ghz as referenced in the above article. The build was a b'day thing for Son No. 3 (he bought the parts, I bought the SSD and did the build) and with them on spring break, I haven't been able to get near the thing since the break started

Once I get my hand son it again, I'll prolly make a "gaming" profile with the 4.8 Ghz setting w/ HT turned off since games won't use it anyway.....that can be good for as much as a 7 - 10C drop if past experience is any indicator. I prolly will step up the fan speed to 1300 rpm in this profile since if it does get audible, I'm sure it will be drowned out by game sounds. With HT off and 1300 rpm, I expect temps will be below 68 at this point. After that, I will likely try for a 5.0 Ghz profile just to see if it can be done below 1.425 volts.....will just use for experimenting tho. The "everyday" and "gaming" profiles should be quite enough.

 

[trihedral]

solid.

try running hella programs while on prime though. If it doesn't blue screen, you're good to try for 5Ghz. lol!

 

[pule]

Good read here:



GHz..... 3.8 ... 4.00 ...... 4.2 ........ 4.4 ........ 4.6 ....... 4.80
Core 1 (51) (31 - 52) (29 - 54) (29 - 56) (31 - 62) (29 - 69)
Core 2 (53) (30 - 54) (30 - 56) (30 - 60) (31 - 66) (28 - 75)
Core 3 (53) (23 - 55) (22 - 57) (22 - 60) (31 - 68) (28 - 79)
Core 4 (51) (29 - 52) (28 - 55) (29 - 57) )31 - 65) (28 - 72)

Core voltages were 1.288 1.344 1.36 1.368 1.368 and 1.408

.

Just a question about the voltages, CPU-Z reads the voltages differently from what I set them. I set my voltage to 1.47 to get P95 stable at 4.7GHz on my 2600k with HT enabled, but in CPU-Z my voltage read 1.368 volts. What's up with this? is 1.47 too high? I feel like that is an uncommonly high voltage for stability for a Sandy Bridge OC