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Temperatures & Overclocking C2D E 7500

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November 30, 2009 5:11:01 PM

Ok.. I have a Intel C2D E 7500 (2.93 GHz, 3 MB Cache, 1066 MHz FSB, 266 MHz * 11.5 (Multiplier)).. I am going to overclock it. I pumped the FSB up to 333 MHz and the Multiplier remained at 11.5. The system started but when I ran the Prime95 Torture test and it failed on 1 core in about 15 minutes..

I reduced the FSB to 315 MHz * 11.5 (3.46 GHz) and ran the Prime 95, it ran for 10 hours, without errors..

Now my question is the ambient Temp in room is about 15 Celsius and the Prime 95 caused a maximum temp of 70 Celsius stable at 67-68 Celsius.. In summers, temperatures go up to 45 Celsius here.. I am currently using the Stock cooler and no Thermal paste ( I am getting the Arctic Cooler A5S).. Do i need a custom cooler ??? Also can someone tell me whats the safe temperature for this Chip...

Also running the Prime 95 for stability was necessary,although I am aware that no Program can stress the CPU to 100 % for hours together. But I think having a stable rig is more important, and anyways courtesy Intel Speedstep the CPU never runs at the full speed even while watching a HD movie the multiplier remains at 6 ..

a b K Overclocking
November 30, 2009 7:09:39 PM

Your at the limit of safe operating temperatures in that 15c room. Are your voltages on auto or manual?
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November 30, 2009 7:15:27 PM

sportsfanboy said:
Your at the limit of safe operating temperatures in that 15c room. Are your voltages on auto or manual?


Voltages are set to Automatic.. Vcore is at 1.32 Volts.. The RAM is 2.1 Volts...
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November 30, 2009 7:25:21 PM

automatic settings are rubbish - dont use them, set everything manually, memory +0.1 at 1:1 etc
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a b K Overclocking
November 30, 2009 7:29:04 PM

I would set the voltage to manual, slowly lowering it while checking for stability in prime95. No you don't need a custom cooler either, the Artic Cooler will be fine for a half way decent overclock.
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November 30, 2009 7:42:09 PM

sportsfanboy said:
I would set the voltage to manual, slowly lowering it while checking for stability in prime95. No you don't need a custom cooler either, the Artic Cooler will be fine for a half way decent overclock.


Ok.. I think I misquoted.. The Artic Freeze is the Thermal Paste that one of my friends suggested.. Should I get a different Cooling solution for the CPU.. I am currently using the Stock Cooler??
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November 30, 2009 7:43:35 PM

apache_lives said:
automatic settings are rubbish - dont use them, set everything manually, memory +0.1 at 1:1 etc


I'll change the RAM Voltage.. What about the CPU .. At automatic it goes from 1.24 (stock) to 1.48 (OC & Full Load in Prime 95).. What figure should I aim at???

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a b K Overclocking
November 30, 2009 8:03:43 PM

john constantine said:
Ok.. I think I misquoted.. The Artic Freeze is the Thermal Paste that one of my friends suggested.. Should I get a different Cooling solution for the CPU.. I am currently using the Stock Cooler??


Well see how you do when you lower the voltage. 70c in a relatively cool room is rather warm.
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a c 197 K Overclocking
November 30, 2009 8:36:05 PM

This should be your first stop.
HOWTO: Overclock C2Q (Quads) and C2D (Duals) - Guide v1.6.1
http://www.tomshardware.com/forum/240001-29-howto-overc...

Then look for a guide for your particular motherboard. Google is your friend.

You didn't say what find of motherboard you have. If you have a Gigabyte motherboard, this will help.
Shadow's Gigabyte motherboard OC guide:
http://www.tomshardware.co.uk/forum/page-245679_11_0.ht...

For anything higher than about 3.2 GHz, you will need better cooling. Here are two under $50 heatsinks that are pretty popular:
Sunbeam
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Xigmatec Dark Knight
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

They both require a somewhat different approach to applying thermal compound.
Suggestions for applying thermal compound:
http://benchmarkreviews.com/index.php?option=com_conten...

And they are pretty large, so they might not fit inside your case.

Stay under 70 C and you should keep CPU vcore under Intel's recommended maximum of 1.3625 volts. 1.48 volts is at the high end of "reasonable" for a 65 nm Core2, but it's too high for a 45 nm CPU.

Set RAM voltage to manufacturer's recommended value. Take the CPU voltage off AUTO and start working way up to a stable value.

If your memory multiplier is on AUTO, you are overclocking your RAM and that is limiting your overclock. Somewhere in the BIOS, you have a setting for "Memory Clock Multiplier" or something like that. Set it to 2.00 if you are using DDR2 RAM. Yu want the mem clock to be twice the FSB to run at 1:1. We discuss that here:
http://www.tomshardware.com/forum/251715-29-ratio-myth

Keep in mind that these are guides, not cookbooks. YMMV. Your Mileage May Vary. Because of all the variables, you may not do as well as someone else with a similar system. Or you might do better.
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Overclocking since 1978 - Z80 (TRS-80) from 1.77 MHz to 2.01 MHz
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December 1, 2009 11:27:26 AM

jsc said:
This should be your first stop.
HOWTO: Overclock C2Q (Quads) and C2D (Duals) - Guide v1.6.1
http://www.tomshardware.com/forum/240001-29-howto-overc...

Then look for a guide for your particular motherboard. Google is your friend.

You didn't say what find of motherboard you have. If you have a Gigabyte motherboard, this will help.
Shadow's Gigabyte motherboard OC guide:
http://www.tomshardware.co.uk/forum/page-245679_11_0.ht...

For anything higher than about 3.2 GHz, you will need better cooling. Here are two under $50 heatsinks that are pretty popular:
Sunbeam
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Xigmatec Dark Knight
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

They both require a somewhat different approach to applying thermal compound.
Suggestions for applying thermal compound:
http://benchmarkreviews.com/index.php?option=com_conten...

And they are pretty large, so they might not fit inside your case.

Stay under 70 C and you should keep CPU vcore under Intel's recommended maximum of 1.3625 volts. 1.48 volts is at the high end of "reasonable" for a 65 nm Core2, but it's too high for a 45 nm CPU.

Set RAM voltage to manufacturer's recommended value. Take the CPU voltage off AUTO and start working way up to a stable value.

If your memory multiplier is on AUTO, you are overclocking your RAM and that is limiting your overclock. Somewhere in the BIOS, you have a setting for "Memory Clock Multiplier" or something like that. Set it to 2.00 if you are using DDR2 RAM. Yu want the mem clock to be twice the FSB to run at 1:1. We discuss that here:
http://www.tomshardware.com/forum/251715-29-ratio-myth

Keep in mind that these are guides, not cookbooks. YMMV. Your Mileage May Vary. Because of all the variables, you may not do as well as someone else with a similar system. Or you might do better.
----------
Overclocking since 1978 - Z80 (TRS-80) from 1.77 MHz to 2.01 MHz


An update..

I ran the Prime 95 for 8 hours straight.. The Temps never crossed 60 Celsius.. Final stats are Processor 320 MHz * 11 (3.52 GHz). RAM ratio set to 2.5 (800 MHz)..

Temps are Manual

DDR Voltage : 1.8 V
FSB Overvoltage: + 0.1 V
CPU Voltage : 1.2875 V

Idle Temp: 39 Celsius
Full Load: 58 Celsius to 59 Celsius..


Any more suggestions????

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!