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overclocking the e8500 on a pq5-dlx

post #1 of 3
Thread Starter 
Looking for people who overclocked their e8500 EO successfully on a pq5-dlx and aiming at the long run. (sig rig)

I was thinking about going 9,5 x 450 = 4,275 as i read a couple reviews and benchmarks making the e8500 "competitive" with some stock quads and stable under aircooling solutions.

Anyone found better settings?
If i am to go 9,5x450, how should i set my dominators? possibility for 1:1 ratio?

You guessed it i'm a newb seeking help :-D

(Check sig rig)

**Edit, p5q-deluxe :-)
Edited by Tatsuo - 10/17/08 at 7:47pm
rock-solid
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rock-solid
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CPUMotherboardGraphicsRAM
E8500 CO @4.1ghz@1.36v ASUS P5Q Deluxe EVGA GeForce GTX 280 (691/1458/1242) CORSAIR DOMINATOR (2 x 2GB) DDR2 1066@1038mhz@2.1v 
Hard DriveOptical DriveOSMonitor
(raid 0) 2x Barracuda 250GB 7200 RPM 3.0Gb/s Blu-ray Vista Ultimate x64 ASUS VW222U 22" 2ms 
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post #2 of 3
Thread Starter 
nothing to add? i heard 8x and higher fsb could be better, is that true?

8x ? vs 9,5x ? whats the difference?
rock-solid
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CPUMotherboardGraphicsRAM
E8500 CO @4.1ghz@1.36v ASUS P5Q Deluxe EVGA GeForce GTX 280 (691/1458/1242) CORSAIR DOMINATOR (2 x 2GB) DDR2 1066@1038mhz@2.1v 
Hard DriveOptical DriveOSMonitor
(raid 0) 2x Barracuda 250GB 7200 RPM 3.0Gb/s Blu-ray Vista Ultimate x64 ASUS VW222U 22" 2ms 
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rock-solid
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CPUMotherboardGraphicsRAM
E8500 CO @4.1ghz@1.36v ASUS P5Q Deluxe EVGA GeForce GTX 280 (691/1458/1242) CORSAIR DOMINATOR (2 x 2GB) DDR2 1066@1038mhz@2.1v 
Hard DriveOptical DriveOSMonitor
(raid 0) 2x Barracuda 250GB 7200 RPM 3.0Gb/s Blu-ray Vista Ultimate x64 ASUS VW222U 22" 2ms 
KeyboardPowerCaseMouse
Microsoft CORSAIR CMPSU-650TX Antec 900 w/mods logitech 
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post #3 of 3
Alright. First a minor correction, its the P5Q, not the PQ5

Those settings could be a little hard to reach at first, I would start at 4.0ghz (9.5 x 421fsb). If you are new to overclocking, which I assume you are, its not as easy as adjusting the FSB. Chances are, you will need to raise the CPU voltage (vcore), and maybe the Northbridge voltage (the Northbridge is on your motherboard). I would start with a vcore of 1.3 and see if it boots at 4.0ghz. If not, you need more voltage on your CPU.

If your PC boots using 1.3v on the vcore, test its stability with Orthos (a program that puts both cores on 100% load) and monitor your temperatures with Coretemp, making sure that the CPU temperature doesn't exceed 70c. An overclock is considered truly "stable" if it can run Orthos without an error for 8 hours.

At 4Ghz, a 1:1 ratio between your FSB and memory clock would be underclocking your ram -- it would be running at DDR2-842 (your ram is "double-data", so doubling your FSB gives you the rated speed of your memory at a 1:1 ratio). I would keep your ram at stock speeds, as there is no reason to downclock them. I doubt it will be any more stable at a 1:1 ratio, but that is the case sometimes; if this is the case for you, which is highly unlikely, you will probably only see a drop in performance in SuperPi benchmarks.

Have fun, and let me know if you need more help!
Chief Keef
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Chief Keef
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CPUMotherboardGraphicsRAM
e4300 @ 2.93G Asus P5B Vanilla eVGA 7900GS KO 2x1GB Crucial Ballistix 
Hard DriveOptical DriveCoolingOS
WD 250GB Samsung DVD-RW AC Freezer 7 Pro Windows 7 Ultimate Edition x86 
MonitorPowerCaseAudio
32" Insignia LED @ 1080p 550w Antec Truepower II Thermaltake Soprano Audigy 2 ZS 
Audio
Logitech 2.1 Speaker/Sub 
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