This is the second part of the article I started a couple of days ago. If you haven't seen it yet, I suggest to check it out as I have put in lots of information in there. I have also submitted my 3DMark06 score over at hwbot.org, and sadly, it never really got too far.
While the previous overclock reached was 50% above nominal, the score is not enough to be a stand out. Compared to other processors, it would seem that 50% is still relatively conservative. However, with the current memory that I have, the default speed it runs is at DDR2-800MHz. Apacer* really worked well, and it served me well till I hit a wall at 450MHz FSB or DDR2-900MHz. No matter what voltage and cooling I tried, it won't get stable enough to complete 3DMark06. At 2.4v with timing of CL5-5-5-18, stability is a big question. For this reason, I am forced to change strategy and tore open an OCZ DDR2 PC2-6400 Platinum Revision 2 Dual Channel memory.
Memory: While I always drool for two sticks of 1GB OCZ DDR2 PC2-7200 Special Ops Edition, lack of $$$ and availability prohibited me. If not for FUGGER of XS, I would have not been able to acquire this memory, free of charge. Thanks FUGGER and XS, you and the forum rocks! Anyway, back to the memory, it has a pretty good timings of CL4-4-4-15 at DDR2-800MHz at 1.9v. It'll be the first time I'll be using this memory and it's fresh right out of the box. I am expecting it to perform much better than Apacer Value RAM. As such, let me report the new test set up:
Test Set Up
Processor Intel® Core™ 2 Duo E6320(1.86GHz) Dual Core
Motherboard: Asus® P5B Deluxe BIOS 1011
Memory: OCZ DDR2 PC2-6400 Platinum Rev2 2x1024MB(CL4-4-4-15 SPD)
Hard Drive: Seagate* Barracuda 120GB SATA RAID 0
Video Card: Asus® 7900GTX 512MB v93.74
Power Supply: Delta 670W EPS12V (server grade)
Ambient Temperature: 35c
::Overclocking and Benchmarking Notes::
After reaching 50% overclock, the next target would be 75% overclock of 465MHz FSB. At this stage, overclocking is already beyond all the nominal settings, from the processor, to motherboard, to memory. Previous settings of 399MHz still puts the memory at its nominal speed, and at this speed, the memory will now run way above stock of DDR2-930MHz from DDR2-800MHz. The processor and motherboard is overclocked by ~75%, while the memory is running ~16% at this settings.
While it would seem that the system is holding out, the main challenge is the ambient temperature which is now hitting 35c to 36c which is way too hot. This will definitely be interesting to see if the 75% overclock on the motherboard and processor, and 16% overclock on memory will survive the rigorous benchmark runs.
Aside from adjusting the vCore manually to 1.3v, the vDimm is also set at 2.1v. All other settings on the motherboard are still left at their default or "auto" values.
Doom3: Low Quality-640x480
Cinebench: Render Score
Cinebench: Render Time
SANDRA: RAM Bandwidth
Loaded Temperature Screenshot
::Closing Thoughts with 75% Overclock::It is clear that all the components in my possesion are a gem to behold. The processor is holding out at such 75% overclock, with a mere 1.3vCore and aging Thermalright XP90 cooler. The motherboard never seems to be giving any hiccups and has been a stable platform. And the memory is just showing its fangs at overclocking. Stay tuned as I continue to push this processor, motherboard, and memory! Till next installment, enjoy the benchmark results...