What do i do wrong?

[rosu9801]

Im trying to OC by using the bios by upping the FSB to 295 (stock is 266) i can got to 300 for a couple of hours but then it will crash.
The bios increases voltages and oc the memory too so i think i dont need to do anything else?
Any input would be great.

Im using:
Memory:
Corsair XMS2 6400 DDR2, 2x1024MB PC6400
64Meg x 8, CAS 5-5-5-15, 800MHz, 240pin
http://www.komplett.se/k/ki.aspx?sku=311292

MB:
MSI P965 Platinum, P965, Socket-775
Firewire,SATAII,ATX,GbLAN,DDR2,PCI-Ex16
http://www.komplett.se/k/ki.aspx?sku=320345

CPU:
Intel Core 2 Duo E6400 2.13GHz Socket
LGA775, 2MB, BOXED w/fan
http://www.komplett.se/k/ki.aspx?sku=322632

PSU:
Corsair Powersupply 620W, 120mm Fan,
8xSATA, ATX/EPS, 2xPCI-E, 20/24pin
http://www.komplett.se/k/ki.aspx?sku=327672

CPU cooling:
Thermalright Ultra-120 eXtreme Socket 775 / AMD
https://www.datorbutiken.com/se/Navigation/Details.aspx?Product=THULTRA120E

Case:
Antec NINE HUNDRED Ultimate Gamer Case without PSU
https://www.datorbutiken.com/se/Navigation/Details.aspx?Product=ANTNINEH

HDs:
Seagate Barracuda 7200.10 250GB SATA2
16MB 7200RPM
http://www.komplett.se/k/ki.aspx?sku=320708
and
Seagate Barracuda 7200.9 250GB SATA2
8MB 7200RPM
http://www.komplett.se/k/ki.aspx?sku=316693

GPU:
BFG GeForce 8800GTS OC 550MHz GPU 320MB DDR3 TV-out HDTV DUAL DVI SLI-ready RETAIL PCI Express
https://www.datorbutiken.com/se/Navigation/Details.aspx?Product=BFG88GTS320

/cry
What have i missed?
Does my chipset become to hot?
Im using speedfan since no tool covers everything i want.
Everything seems low except one value who remains at +120 degrees celsius.
Cpu is at 26-30 degrees and Gpu is at low 50s, Hds is at about 24, no clue about memory though.
I do have a 3rd party chipset cooler lying around, should i try that?

Did i miss something painfully obvious?

From a beginner at oc'ing.

 

[CompuTronix]

rosu9801, check out the following Sticky's: HOWTO: Overclock C2Q (Quads) and C2D (Duals) - A Guide v1.2 http://www.tomshardware.com/forum/240001-29-howto-overclock-quads-duals-guide

Core 2 Quad and Duo Temperature Guide: http://www.tomshardware.com/forum/221745-29-core-quad-temperature-guide

Hope this helps,

Comp

 

[rosu9801]

Lol yeah ty, i just started after i posted...
Did i tell you im a beginner. =)
Seems i have hung out in the GFX section to long, hehe.

 

[rosu9801]

Well went home and tried some stuff out.
E6400 @ 8x333 / 2.7 GHz atm, gonna stress it and se how stable it is.
Haven't managed to get memory to 1:1 but they are at 2:3 and for now it seems good.
Can i use 2:3 or will they die on me ?
Temps seem ok cores at 51 degrees celsius.
Vcore at 1.320 (to much?).
Anything else i should look for?

 

[rosu9801]

8x350 / 2,8 GHz and stress testing 12+ hrs and counting.
Still worried about memories, they are at 2:3 up to 1200MHz i think. (forgot number im at work atm)