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06-22-2009, 02:48 AM
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Re: Q8200 Upgrade Q8400
There won't be any problems at all.
It's a bit of a pointless upgrade though. You should be able to get your Q8200 to at least 3.2GHz. I had mine stable at 3.4GHz on 1.3625V. The Q8400 is just as bad at overclocking.
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Lian Li PC-A09 Case (Full Aluminium) Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail EP45-UD3P v1.0 @ F10e E7400 @ 9.5 x 411, 3.9GHz, 1.425v ??c idle (stuck DTS sensors) and 57c full load (23c ambient) TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db . 2x2GB Corsair XMS2 PC2-8500, @ 5-5-5-15, 1093-DDR, 2.14v tRead 7 stable 2 x HD4850 512MB @ 715 Core / 2130 Mem. CrossFireX Scythe Musashi twin 100mm fan cooler, 40c Idle and 65C FurMark "Xtreme Burning Mode" Intel X25-M 80GB SSD (OS and Programs) 250MB/s Read 75MB/s Write and WD Caviar Blue 640GB (Storage, Downloads, Temp Files & Folders, Page File etc) Noctua 1300RPM 19dB case fans Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050 This rig loads Windows 7 from the end of AHCI detection to a usable desktop in 13 seconds.  System has passed 24 Hours Prime Blend, 12 hours of both Large and Small FFT and 50 Runs of Intel Burn Test (Maximum Stress) http://valid.canardpc.com/show_oc.php?id=609332     
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06-22-2009, 07:57 AM
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Re: Q8200 Upgrade Q8400
In addition to psycho's comments check out this article.
AnandTech: The Core 2 Quad Q8400: Intel's $183 Phenom II 940 Competitor I can run my Q8200 at 3.5 ghz 24/7 if I wished but for 9gb/s bandwidth I need to drop it to 490 cpu /fsb(3.43Ghz). If the Q8400 needs a lower fsb/cpu ref to reach the same speed it could actually be a downgrade. ie if its just a Q8200 with a 8 multiplier but wont run any faster than the Q8200 (3.55-3.6Ghz max on air) you would have to drop the multiplier down to 7 again to get max pc performance. Then again I havent actually tested a Q8400 on "our" mbrd but unless its some kind of $20 swop it would seem a bit pointless.
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Gigabyte EP-45 UD3 bios F8 490 fsb/cpu ref 3.43 Ghz Q8200 980mhz4gb GSkill Black PI 6400 mem(22% o/c) cpu 1.34375V bios(1.32max cpuz) mem 2.08V bios(2.05max cpuz) mch 1.38V bios Coolermaster V8 24/7 case cover on temps 2000fsb!: Peak 71*C cpu core0/62*C cpu/40*C sys/41.2*C nb/48*C Gpu/38*C HDD on 14hr prime 95 blend.(ambient oat 25*C 24-26C) 2.00D tRD 9 bandwidth 9G/s Jeantech 500w psu Jeantech R2 case(modified). 2x120mm fan for nb/memory+3x80mm,1x90mm exhaust fans 9600 gt 512ddr3 1TB WD HDD Vista 64 premium sp2!
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06-22-2009, 08:11 AM
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Re: Q8200 Upgrade Q8400
I actually "upgraded" to a dual core. Not saying the Q8200 is a bad CPU, it's not and was fast at 3.4GHz, but for me clockspeed was important (Crossfire GPU's on the way).
The minimum I would upgrade to from a Q8200 would be either a Q9550 (E0 stepping) or a dual core capable of 3.8GHz or more.
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Lian Li PC-A09 Case (Full Aluminium) Corsair HX750 (CWT, 91%(80+ Gold rated @230V) single 62A 12V rail EP45-UD3P v1.0 @ F10e E7400 @ 9.5 x 411, 3.9GHz, 1.425v ??c idle (stuck DTS sensors) and 57c full load (23c ambient) TRUE Black with a single Noctua NF-P12 pumping out 55 CFM @ 19db . 2x2GB Corsair XMS2 PC2-8500, @ 5-5-5-15, 1093-DDR, 2.14v tRead 7 stable 2 x HD4850 512MB @ 715 Core / 2130 Mem. CrossFireX Scythe Musashi twin 100mm fan cooler, 40c Idle and 65C FurMark "Xtreme Burning Mode" Intel X25-M 80GB SSD (OS and Programs) 250MB/s Read 75MB/s Write and WD Caviar Blue 640GB (Storage, Downloads, Temp Files & Folders, Page File etc) Noctua 1300RPM 19dB case fans Dell Ultra Sharp 2209WAf E-IPS @ 1680x1050 This rig loads Windows 7 from the end of AHCI detection to a usable desktop in 13 seconds. System has passed 24 Hours Prime Blend, 12 hours of both Large and Small FFT and 50 Runs of Intel Burn Test (Maximum Stress) http://valid.canardpc.com/show_oc.php?id=609332
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