Athlon II X4 640 Overclock
Athlon II X4 640 Overclock
Hey guys!
This morning I increased my CPU speed to 3.5 GHz using just the multiplier setting. Before that, it ran smoothly at 3.4 GHz and didn’t crash at all for the whole day. Now I’m trying to go a bit higher to 3.5 GHz without changing the voltage. I’m using an 880GM UD2H (rev 1,3) and some people don’t really suggest doing this for overclocking, though a few managed to push their CPU with constant OC. I’m trying to be sure I’m safe before making any changes, since I plan to switch to an Athlon 950/970 in about 5-6 months. Here are some pictures:
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https://imgur.com/a/wiOGx
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https://imgur.com/a/uSKVF
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I also tested the RAM, which is now clocked between 1333MHz and 1500MHz. The Windows Memory Diagnostic didn’t find any errors. Is this safe? It’s only going to be used for short game sessions (10 hours max), not nonstop 24/7 use.
The board features only 4+1 power phases and lacks heat sinks on the VRMs, meaning you're doing OC at your own risk. Luckily, the board quality is decent, which could provide some benefit temporarily. The AMD-approved maximum voltage for that CPU line is 1.5V, applicable to brand new, unused CPUs. If a stable OC without higher voltage can be achieved, it may extend the motherboard's lifespan. Monitor temperatures during stress tests; keeping them below 71°C (with occasional spikes) is ideal. Also, note you mentioned using only the multiplier for OC—likely referring to increasing the base clock as shown in your diagram, given the Athlon II X4 640's locked multiplier.
The board features only 4+1 power phases and lacks heat sinks on the VRMs, meaning you're doing OC at your own risk. Luckily, the board quality is decent, which could provide some benefit temporarily. The AMD-approved maximum voltage for that CPU line is 1.5V, applicable to brand new, unused CPUs. If a stable OC without higher voltage can be achieved, it will positively impact the motherboard's lifespan. Monitor temperatures during stress tests; staying below 71°C (with occasional spikes) is ideal. Also, note you mentioned using just the multiplier for OC—likely you were increasing the base clock as shown in your diagram, given the Athlon II X4 640 has a fixed multiplier and can only be reduced, not increased.