Overclocking AMD Athlon X2 II 250 3ghz with stock heat sink?

Question

okay, So i was at 2.99GHz (Stock) uped the bus speed to 210 from 200, now at 3.15GHz i want to up it more, but i got to 240 and it shut down on me, so what do i need to up for it to be best with the provided heatsink. (composer and producer for music, It's my home studio PC)

Motherboard, ASRock M3A785GMH/128M
Processor, AMD Athlon X2 II 250 (Bought brand new)
RAM, 8GB DDR3 @1333mHz
GPU, ATI Radeon 2400 HD.
Windows XP Pro x64

I am using The OC tuner on the BIOS to overclock, i needd to knwo what to up and what to lower.

i need it very easy to understand as help online is too in depth!

(All Drivers and BIOS, and DirectX, Shader is all up to date)

Idle the CPU (2.99GHz before OC) was at 33-35dC at 3.15GHz (after OC (Bus at 210mHz)) idle is 34-36dC.

Max Load (100%) before OC 38-48dC and after OC 42-49dC

(using provided HeatSink with Artic Paste not the Provided Paste/Ceramic, (it';s a thin layer as that what other do more than thick)

Don't really want to getr new Heatsink as current one is nice and quite (AMd Cool'n'Quite)

Number of cores 2 (max 2)
Number of threads 2 (max 2)
Name AMD Athlon II X2 250
Codename Regor
Specification AMD Athlon(tm) II X2 250 Processor
Package Socket AM3 (938)
CPUID F.6.3
Extended CPUID 10.6
Brand ID 13
Core Stepping DA-C3
Technology 45 nm
TDP Limit 60 Watts
Core Speed 3149.9 MHz
Multiplier x FSB 15.0 x 210.0 MHz
HT Link speed 2099.9 MHz
Stock frequency 3000 MHz
Instructions sets MMX (+), 3DNow! (+), SSE, SSE2, SSE3, SSE4A, x86-64, AMD-V
L1 Data cache 2 x 64 KBytes, 2-way set associative, 64-byte line size
L1 Instruction cache 2 x 64 KBytes, 2-way set associative, 64-byte line size
L2 cache 2 x 1024 KBytes, 16-way set associative, 64-byte line size
FID/VID Control yes
FID range 4.0x - 15.0x
Max VID 1.400 V
P-State FID 0xE - VID 0x0C - IDD 22 (15.00x - 1.400 V)
P-State FID 0x7 - VID 0x14 - IDD 17 (11.50x - 1.300 V)
P-State FID 0x2 - VID 0x1C - IDD 16 (9.00x - 1.200 V)
P-State FID 0x100 - VID 0x28 - IDD 7 (4.00x - 1.050 V)

Chipset
Northbridge AMD 785G rev. 00
Southbridge AMD SB700 rev. 00
Memory Type DDR3
Memory Size 8192 MBytes
Channels Dual, (Unganged)
Memory Frequency 420.0 MHz (1:2)
CAS# latency (CL) 6.0
RAS# to CAS# delay (tRCD) 6
RAS# Precharge (tRP) 6
Cycle Time (tRAS) 15
Bank Cycle Time (tRC) 20
Command Rate (CR) 2T
Uncore Frequency 2099.9 MHz

Temperature 0 35°C (95°F) [0x23] (SYSTIN)
Temperature 1 37°C (98°F) [0x4A] (CPUTIN)
Temperature 2 36°C (95°F) [0x47] (AUXTIN)
Fan 0 1164 RPM [0x91] (SYSFANIN)
Fan 1 3013 RPM [0x38] (CPUFANIN0)

Name ATI Radeon HD 4200
Codename RS880
Technology 55 nm
Memory size 128 MB
Memory bus width 32 bits
GPU ref clock 14320
PCI device bus 1 (0x1), device 5 (0x5), function 0 (0x0)
Vendor ID 0x1002 (0x1849)
Model ID 0x9710 (0x9710)
Performance Level 0
Core clock 501.2 MHz

Answer 1

trying to overclock using a stock cooler is never a good idea. These coolers are not designed for the extra heat generated by overclocking your CPU beyond its original setting.

There are limits to how far you can safely overclock and you have obviously reached it, get a better cooler or stick to a lower OC or you risk burning out the CPU.

Answer 2

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Answer 3

You may have reached your limit for this heatsink, or even for the processor. The limit is defined by the individual processor and the slight variations inside it, so without upgrading your heatsink it may be difficult to know if you can wring anymore out of it...