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I5-750 O/C

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May 12, 2010 12:17:23 PM

My issues have been directed as being a CPU bottlenecking my 5870...( http://www.tomshardware.co.uk/forum/288368-15-faulty-58... ). I have stock cooler, how high can I go? My idle temperatures are 43-48/50 according to core temp.

More about : 750

May 12, 2010 4:31:43 PM

I played Metro 2033 for a few hours and my highest temperatures are 61-64C.
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a c 100 K Overclocking
May 12, 2010 5:29:57 PM

That's pretty high temps. Considering you were willing to invest $400 in a gpu, you should probably just grab a $60 CPU cooler. I have my i5-750 OCed to 3.68ghz (175 base clock, 21x) and turbo is enabled so it goes as high as 4.2ghz. My idle temps are mid 20s (C6 enabled reads as low as 18C on all cores in CoreTemp and SpeedFan but not HWMonitor - C6 turns your CPU off when idle). At load it's still only mid 50s - and that's with more than 1ghz overclock.

As a guideline, my voltages are 1.302V Vcore and 1.197V VTT but our systems are different so you probably can't just plug those in and have it stable.

I have some questions tho. Is the card OCed? What graphic settings are you using? What level of AA? And, have you played Crysis? If so, what are your FPS and at what settings - we can compare to my 5850 which I OCed to be faster than a stock 5870 (it's at 985/1200). I haven't played Metro 2033 yet.
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May 12, 2010 7:13:13 PM

My card runs at 875mhz/1250mhz, haven't changed anything. I ran crysis at 1280x1024 with and without AA, exactly same results, 25fps at intensive scenes and explosions 30-40fps average. I also have micro-stuttering issues from time to time.
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May 12, 2010 7:38:00 PM

Interesting... the fact that with or without AA gets the same results, then yea I guess it has to be something other than the video card, because otherwise there should be a noticeable difference in max frame rates. What RAM are you using? And have you checked the BIOS to make sure it's at the rated speed? Often by default it only runs at 1333mhz and if it's 1600mhz RAM you'll need to start some tweaking, starting with the baseclock. If you can load an XMP profile try that out - they generally will change the base clock as well, basically giving a little overclock. Test it out.
May 12, 2010 9:30:07 PM

link_q said:
My issues have been directed as being a CPU bottlenecking my 5870...( http://www.tomshardware.co.uk/forum/288368-15-faulty-58... ). I have stock cooler, how high can I go? My idle temperatures are 43-48/50 according to core temp.


On the professional level I would buy an Aftermarket Heatsink. Those temps you have there are not going to go any lower than what is now.
Aftermarket Heatsinks are always recommended when Overclocking the system.
There is not such thing is bottlenecking the 5870 card. I have the same setup and I Overclock my Intel i5 750 to 4.2Ghz but I have it on 4.0Ghz.
Now if you are running ram under 1333MHz then you are going to run into some issues when you Overclock.
Now if you don't have at lease 1333MHz RAM then you are going to run into some issues.

Please list the spec of your system so we all have an idea what we are going to give you as a answer.

But I have a video here that shows you how to Overclock the system with a Intel i5 750.
But note that stock Heatsink is not recommended to do any type of Overclocking. I am going to be honest about it and just say that the Intel stock Heatsink SUCKS PERIOD.
http://www.youtube.com/watch?v=I6zANFlYEDM This is my video and I help dozens on folks in there help in overclocking. They didn't do as the video but they took notes and learn from other's video as well.
May 12, 2010 9:58:06 PM

i5-750,4gb RAM Corsair dominator GT 1600 7-7-7-20 ,ga-p55-usb3, sapphire radeon 5870 1gb, OCZ 700w.
May 12, 2010 10:01:23 PM

sapphire radeon vapor-x* 5870 1gb
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May 12, 2010 10:44:40 PM

You could modify the intel fan, which is in fact very good. If you take the fan out, you will see a chip on the reverse side. It is a poorly designed thermistor which takes ambient air temps instead of core temps. Rip that thermistor out with pliers and you should see some noticeable temps improvement. No it is not going to be as good as aftermarket cooler, but you could try this before you spend.
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May 12, 2010 10:52:24 PM

HansVonOhain said:
You could modify the intel fan, which is in fact very good. If you take the fan out, you will see a chip on the reverse side. It is a poorly designed thermistor which takes ambient air temps instead of core temps. Rip that thermistor out with pliers and you should see some noticeable temps improvement. No it is not going to be as good as aftermarket cooler, but you could try this before you spend.


Well that could help. Also, remounting the stock cooler to make sure it's right, and some CPU lapping probably would help a bit too... but I mean, really, aftermarket coolers are a good investment.
May 13, 2010 1:20:07 AM

HansVonOhain said:
You could modify the intel fan, which is in fact very good. If you take the fan out, you will see a chip on the reverse side. It is a poorly designed thermistor which takes ambient air temps instead of core temps. Rip that thermistor out with pliers and you should see some noticeable temps improvement. No it is not going to be as good as aftermarket cooler, but you could try this before you spend.


Sorry but I wouldn't waste my time Lapping an Intel stock heatsink. Cheap and not such a good heatsink in the first place. Even if you lapped it you only will mostly likely see a 2C decrease. Aftermarket heatsinks are the best for O.C and not stock.

I know with 1600MHz RAM I can most likely hit 3.8GHz or even 3.9GHz
Wolfram23 and I are right about investment in an Aftermarket Heat sink.
But Bottlenecking that 5870 that is the issues here and I don't think it is bottleneck, (not all that much since you O.C The Video Card)
I do believe if you Go into BIOS and change the PCI Express Freq from (AUTO) to (100) it may help.
and make sure the voltage for your RAM are correct and Load Line Calibration is (enabled)
May 13, 2010 8:26:41 AM

Keiki646 said:

I do believe if you Go into BIOS and change the PCI Express Freq from (AUTO) to (100) it may help.
and make sure the voltage for your RAM are correct and Load Line Calibration is (enabled)

Can you explain to me about these configurations? I am a noob at these stuff...
May 13, 2010 1:42:25 PM

link_q said:
Can you explain to me about these configurations? I am a noob at these stuff...


my last two replies there is a link to a video on how to overclock an Intel i5 750.
there you will see my enter the voltages settings
but PCI Express Frequency is always on (AUTO) so change it to 100
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May 13, 2010 2:03:59 PM

Keiki646 said:
my last two replies there is a link to a video on how to overclock an Intel i5 750.

NO, there is a video of you overclocking your computer. It's not teaching anyone anything about overclocking.
There's a little more to overclocking than to put someone elses setting into your computer and hope they work. You really should learn about the Bios settings and what they do, plus all the other things you HAVE to know like temperatures, testing, etc. etc.

You are doing more harm, than good, with your use my setting video and don't bother to learn how to OC.

May 13, 2010 2:28:22 PM

RJR said:
NO, there is a video of you overclocking your computer. It's not teaching anyone anything about overclocking.
There's a little more to overclocking than to put someone elses setting into your computer and hope they work. You really should learn about the Bios settings and what they do, plus all the other things you HAVE to know like temperatures, testing, etc. etc.

You are doing more harm, than good, with your use my setting video and don't bother to learn how to OC.


Now I didn't say to him that he needs to have the same settings, What I am telling him is to learn by reading and also to watch videos of others by observed the video on what I am talking about & take notes when it comes down to his PCI Express Frequency and The Load Line in Voltages.

Some people watch videos and compared them to the notes that they added and documented.
That is what he should do in order for him to learn. So it is teaching someone how to overclock when watching a video , as if he was in the classroom.
It's information that all of us give to each person everyday.
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May 13, 2010 4:01:08 PM

Once again Keiki646, we completely disagree. You are trying to help OCing noobs but your video's and advise once again do more harm than good.

Do you even know what LLC (load line calibration) does and the effects it has on the cpu? Intel has specific guidelines for vdroop/vdrop on there cpu's for a reason. Telling someone who is new to OCing to just enable LLC without knowing what it does and the risks associated with using it, is, once again proof of your inexperience and bad judgement.
May 13, 2010 10:10:42 PM

RJR said:
Once again Keiki646, we completely disagree. You are trying to help OCing noobs but your video's and advise once again do more harm than good.

Do you even know what LLC (load line calibration) does and the effects it has on the cpu? Intel has specific guidelines for vdroop/vdrop on there cpu's for a reason. Telling someone who is new to OCing to just enable LLC without knowing what it does and the risks associated with using it, is, once again proof of your inexperience and bad judgement.


Once again you're always trying to attack me when you are wrong about learning process. This is not about me this is about him/her learning how to O.C
Research show that 57% of the world pick up common knowledge from documenting video or from reading what they see.
But then again you adding words to my mouth again switch the word were not said. You need to stop adding word to my replies and help him out more than follow me around and attack everything I say to someone.

Not going to say it again , I didn't tell the him/her to do as my video shows. I told him/her to learn from it and to learn from others as well by picking up the information. You need to stop trying to be a hero and help him/her with their problem.
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May 13, 2010 11:53:06 PM

Keiki646 said:
This is not about me this is about him/her learning how to O.C

VERY TRUE, so PLEASE stop trying to help people so they can get COMPETENT advise from someone who has a clue.
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May 14, 2010 12:13:05 AM

I've seen this reaction when people are trying to be helpful and make a video or I shouldn't use this word, lol a guide.
This is just a how to, how he did it.
I found the video basic, and not to aggressive. There are worse, where the author states a rather high subjective V to attain 4.00ghz (the magic #)
http://www.youtube.com/watch?v=Vsk5iocFlgg
This is using turbo, states for Gigabytes boards and gives someone clues at least what settings do what in that type of o/c.
I don't think its harmful at all.
Gigabyte boards come stock with most Voltage settings on auto and if you use their auto o/c feature , which they URGE users to do, your settings will be wilder and more aggressive than this or your computer just won't start.
People learn by trial and error yes, also, reading multiple how to's , user experiences.
May 14, 2010 12:23:28 AM

notty22 said:
I've seen this reaction when people are trying to be helpful and make a video or I shouldn't use this word, lol a guide.
This is just a how to, how he did it.
I found the video basic, and not to aggressive. There are worse, where the author states a rather high subjective V to attain 4.00ghz (the magic #)
http://www.youtube.com/watch?v=Vsk5iocFlgg
This is using turbo, states for Gigabytes boards and gives someone clues at least what settings do what in that type of o/c.
I don't think its harmful at all.
Gigabyte boards come stock with most Voltage settings on auto and if you use their auto o/c feature , which they URGE users to do, your settings will be wilder and more aggressive than this or your computer just won't start.
People learn by trial and error yes, also, reading multiple how to's , user experiences.


Thank you for understanding and realizing what the all of this means. It's a How to video and not a Do this Video.
I'd agree with Notty22 100%
Also I will like to Apology to Link_Q for all the negative replies and such troublesome words that have been exchange here.
Listen Link_Q it up to you to listen to us or not but it's best that you should take your time in understanding the facts about Overclocking.
You can watch videos so you can see for yourself what not to do and what is the right thing to do but reading is number one in as well when learning to do something.

Here is a Video Link on Overclocking an Intel i5 from NCIX Tech Tips. http://www.youtube.com/watch?v=I6zANFlYEDM and http://www.youtube.com/watch?v=Llqhe3N1cJA&feature=watch_response
View the video and just take down notes that you feel that might help you understand about it more.
May 14, 2010 10:59:59 AM

Guys don't fight!!
Thanks a lot for the help you are trying to give me, and I don't believe you shouldn't attack keiki646, he was just trying to be helpful.
Check out this post http://www.tomshardware.co.uk/forum/288368-15-faulty-58... i made, it describes my problems and then advise me if overclocking is what I need to do.
May 14, 2010 3:00:56 PM

link_q said:
Guys don't fight!!
Thanks a lot for the help you are trying to give me, and I don't believe you shouldn't attack keiki646, he was just trying to be helpful.
Check out this post http://www.tomshardware.co.uk/forum/288368-15-faulty-58... i made, it describes my problems and then advise me if overclocking is what I need to do.
Before you even try to overclock your system, you must get a better heatsink first.
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May 14, 2010 3:07:49 PM

If you are trying to overclock with the stock cpu cooler you might want to go back and look at tom's previous system builder marathons. In one of them they used small cases and one of the builds had to use the stock cooler because a larger one wouldn't fit. You can read that build and see what kind of overclock they managed with the stock cooler. This was probably with an i7-920 but it would be somewhat similar for you.
May 16, 2010 5:48:48 PM

The max temperatures I've seen my pc go on gaming are 60-65c. I checked out the bios and I have a clock speed of 160 with a multiplier of x17. Should I go for a small overclock to 3.0, 3.2ghz?
May 16, 2010 5:57:58 PM

Cpu-z shows that core voltage is at 1.264V changing to 1.248V every few seconds or so.
May 17, 2010 3:46:25 AM

link_q said:
The max temperatures I've seen my pc go on gaming are 60-65c. I checked out the bios and I have a clock speed of 160 with a multiplier of x17. Should I go for a small overclock to 3.0, 3.2ghz?

Why do you have an Intel i5 750 at X 17??? Whoa, you are better off using a 20x multiplier for better results.
If you want you can disable turbo boost or can leave it one at a 160 multiplier or go up to 175.
To be honest I would set the CPU Core Voltage at 1.2800V and the QPI/VTT at 1.25V
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May 17, 2010 6:31:51 AM

With the base clock at 160 you should be able to use x20/x21 with turbo not much problem and keep it within spec. By that I mean that Intel's absolute maximum voltages on the i5 750 are 1.55V Vcore and 1.21V VTT - I use 1.197V VTT at 175 bclk so at 160 it's less. I also have turbo enabled, so again, at 160 that's also "easier" to do. Point is, I wouldn't be too worried of maximizing your speed at 160 bclk so long as temps are fine. Mine don't go over 60C
May 17, 2010 10:29:28 AM

Keiki646, these are the stock settings, I haven't changed anything, it runs at 2,67ghz.
Turbo is enabled I think. Do you believe that one of these settings cause my fps drop?
As I told before my regular temps are at 45 and on load go to 60-65.
May 17, 2010 10:38:02 AM

My mistake, it runs at 2,72ghz. I wrote down some readings at the bios.
Vcore 1.248v
Dram Voltage 1.664v
QPI/VTT Voltage 1.100v
CpuVcore: 1.16250V
Turbo is auto
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May 17, 2010 2:42:00 PM

link_q said:
My mistake, it runs at 2,72ghz. I wrote down some readings at the bios.
Vcore 1.248v
Dram Voltage 1.664v
QPI/VTT Voltage 1.100v
CpuVcore: 1.16250V
Turbo is auto


The stock vcore is only 1.15V, so you're getting more heat than needed. You should be able to drop that a bit.
May 17, 2010 7:39:14 PM

Is there any chance that one of these settings cause the problems?
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May 17, 2010 9:33:02 PM

Have you made sure all your drivers are up to date? You can download a program like Driver Detective to check automatically. I had to update about 45 drivers when I put my PC together less than a month ago. With that program, the trial version will at least scan for issues then you can do google searches or go to the related manufacturer websites and find the relevant drivers instead of paying for it to do it automatically. It's not too hard. Make sure your BIOS and GPU drivers especially are up to date.

If not that, I recommend you do some reading up on OCing and give it a try. Your temps are pretty high tho so you should definitely get an aftermarket cooler.

Also I don't get why your Vcore is so high at stock... actually, I don't get why you have "vcore" and "cpu vcore" the second one appears about right... you'll have to do some searching for specifics on your mobo and overclocking with it.
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May 17, 2010 9:49:56 PM

This is the voltage applied to my i5 750 with the normal setting.
gigabyte ud4p , i5 750
with the normal setting, the cpu lowers the V in idle times as low .88 , at full load in prime 95 , rises to 1.26 in monitoring programs.
I lose the Vcore auto down volting when I select a voltage manually.
I have read the stock Vcore as 1.25 , here at TH as well.

IDLE

LOAD, 1 bin Turbo

1 thread , full turbo

http://www.pcper.com/article.php?aid=776&type=expert

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May 17, 2010 10:33:28 PM

Hmm that's very interesting, must be because of how VID is reading. Well, I haven't used the "auto" voltages since I started to learn about OCing my PC so I really didn't run any tests, I guess mine probably did that as well. It no longer down-volts itself but I've got EIST, C1E, and C6 enabled so it does power down and drop the multi to 9x.

Anyway, my mistake I guess. Although it does still seem too high, I know for sure my board's "auto" is at 1.15V, but I can only assume it scales up and down as necessary at auto.
!