Have ?'s and need help OCing E8500

fibonacci_rr

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Hello everyone, I just put together my first new PC and have been trying to read up on all the new lingo. I have an 8500 (newest step) with ddr2-800 (crucial w/ heat spreaders), ASUS P5KC, and Zalman9500 cooler. From what I've read (guides, etc.) I think I'm going to go with overclocking FSB to 400 MHz to match ram for 3.8GHz, but I had a few questions I was hoping someone could answer (Please help, I'm a narratic newb :wahoo: ).


Would this be a fairly safe/reliable OC. Any other suggestions?


Any suggestions for VCORE?


Would I need to change any other settings aside from VCORE and FSB?


Is overclocking the FSB safe (heat?) for other components on motherboard related to FSB?


Is overclocking FSB going to be a concern for other devices to write/read, etc.?




Please help, thank you!
 

Priv

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Would this be a fairly safe/reliable OC. Any other suggestions?
Should be easy with that cooler. 3.8 GHz isnt that high of an overclock.

Any suggestions for VCORE?
Different for every CPU, you'll have to find this out yourself, yes it is timeconsuming.

Would I need to change any other settings aside from VCORE and FSB?
Yes, but 3.8 GHz could be done on auto settings for the rest.
Is overclocking the FSB safe (heat?) for other components on motherboard related to FSB?
Only northbridge temp should go up really, and only if you up the voltage of it. Memory wont generate more heat because it's running the same frequency and same voltage still.

Is overclocking FSB going to be a concern for other devices to write/read, etc.?
Only memory, motherboard and CPU.
 

br3nd064

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1) Yes it's a safe overclock

2) Every cpu is different, as Priv said. I think mine needed ~1.25v at 3.8ghz.

3) You may need to raise the NB voltage, but that's it.

4) The NB will generate more heat, but as long as you have a decent heatsink on it, I wouldn't worry.

5) No, as long as you have it at 9.5x400, and you're not trying to find the max FSB.
 

murdoc

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Are you serious?! E8500 running at 3.8ghz on 1.25v core? I'm on 3.6 and I'm using 1.26!
 

anartik

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If 3.8 is all you are aspiring to you should not need to change anything other than FSB to 400. I have a similar setup (I even have the older C0 stepping) and the first thing I did was flip to 400 with no other changes required. If you really wanted to push the 8500 you probably should have bought DDR2 1066 memory which is ideal IMO. My FSB is at 460 and with a 5/6 divider my memory is only overclocked from 1066-1104 with a 2.1-2.2 voltage increase. I think I only paid $100 for a 4gb OCZ platinum kit.
 

br3nd064

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It's not that weird. Mine needs 1.28v for 4.0ghz, but theres a big jump to 1.33v for 4.2ghz.
 

br3nd064

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In your sig it says 4.6ghz. Does that mean you're running it 24/7 with a 1.6v vcore??
 

br3nd064

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You're right, but phase change only reduces temps. 1.6v for 24/7 use will kill the cpu pretty quick.
 

richardscott

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yea i am runnin 24/7 ill put a post up when my cpu dies but it wont happen before its swaped out for a e8600 at xmas. as for temps if you reduce the temp of a cpu by 10C then you double the lifetime. so time for some maths. at full load my cpu is at -30, which is 100c below the thermal spec so assume my processor would last 1 day at 70c then thats 2^9 days at -30. which is 512 days. anyway to put it mildly vcore wont kill my processer. here is a good link from extreme systems you should all read.

http://www.xtremesystems.org/forums/showthread.php?t=198614

my processor is useing alot less voltages and lower temps than this guy has.
 

murdoc

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Well I'm running at 3.91 ghz right now and testing it under OCCT v2.0.1 and I'm hitting temps like 76 celcius (According to RealTemp 2.78.9) the voltage used is 1.34. In fact, I need 1.32 volts to make sure I'm running 3.8 ghz without it crashing on OCCT. I'm not sure how you guys have 3.8ghz running on stock voltages. I'm aiming for 4.0ghz but the voltages and the temps are making me skeptical about pushing it that far.

My cooler right now is CoolMaster HyperTX2. If you guys have any suggestions on coolers I should use please advise!! Please keep in mind I have an Asus P5Q motherboard so the heatsink must fit on that. I've got 4 rams sticks installed so I can't afford the heatsinks to take up ram slots. Thanks!
 

br3nd064

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You probably just have a chip that isn't good at overclocking. What's the VID on it?
 

murdoc

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I don't know how to tell so you're going to have to enlighten me on this.

According to RealTemp, my min VID is 1.1500 and max is 1.2250 (I don't know if that's how I could tell what my VID is). Let me know the results. Thanks!
 

murdoc

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You mean something like this will fit on my P5Q mobo?
 

murdoc

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Would you recommend the Artic Cooling Freezer Xtreme over the HyperTX2 that I currently have? What coolers would you say I should get for great cooling performance yet keeping the noise level down?
 

br3nd064

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That's weird. Mine has the same VID, but can get to 4.0ghz on 1.28v, and the temps only rise to upper-50's. All I can say is that every chip is different.
 

murdoc

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yeah.. that's exactly what I thought. If I try doing 4 ghz at 1.28v, TF2 will crash and OCCT will fail in less than a second. I MIGHT be able to run Wprime properly although the latest OCCT is very sensitive to errors so I wanted to make sure I pass the OCCT test first to ensure max stability. Maybe it's time for me to turn to a better cooler.

Would you say that the Artic Cooling freezer extreme be a satisfactory upgrade from CoolMaster Hyper-TX2?
 

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