Swiftech MCW6500-T TEC (Peltier) Assisted Water Blockhardnrg -
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With the CPU temperatures under serious control from the MCW6500-T it was time to go for some sick overclocks.
First, I took the 3500+ up to it's maximum stable overclock on air ,achieved using a Thermalright XP-120. This speed was 2.92 GHz - I love this Venice! The plan was to record the temperatures at this overclock and overvoltage, and then attempt to break my previous records.
- AMD 3500 Venice (no heatspreader) @ 2.92 GHz, 1.600v
- Swiftech MCW6500-T TEC-assisted water-block
- Swiftech MCP655 (Laing/DD D5) pump
- Swiftech MCR220-QP radiator (2x Panaflo 120x120x38mm M1A fans @ 12v)
- Swiftech MCRes-Micro reservoir
- DFI NF4 Ultra-D (modded to SLI)
- 1x 512MB G.Skill LE PC4400 (2.5-4-4-8-1T)
- 2x Point Of View 7800GT 256MB @ 522 / 1260, voltmodded to 1.712v GPU
- 2x Dangerden Maze4 GPU low profile water-blocks
- PC Power & Cooling 510 SLI/Express PSU
- Meanwell S-320-12 PSU
- 2x Hitachi 160GB 7k250 SATA1 (RAID-0)
- 2x Hitachi 250GB T7k250 SATA2
- Hitachi 200GB T7k250 ATA
- Seagate 200GB 7200.7 ATA
- NEC ND-3500A DVDRW
- Microsoft Windows XP Pro SP2
Ambient = 26°C
All Temps (CPU Idle vs CPU Load)
Even at nearly 3 GHz and 1.600v CPU voltage, the MCW6500-T kept the CPU at only +3°C over ambient at load. The type of CPU that the MCW6500-T was designed for was becoming clear and the strange graph from before made more sense. If the CPU isn't a heat producing monster, then the temperatures achieved with the MCW6500-T will be better than air or water cooling. Lower temperatures mean more stability. But just how much stability can you achieve? On air with the Thermalright XP-120, the idle temperature hovered around 35°C while the load temperature was around 43°C. So for total system stability, this was the end of the line for air cooling.
Some quick testing using Memtest86+ showed the 3500+ passing the easier tests at up to 3.2 GHz, much higher than ever before!
SuperPi 1M test calculates the first million digits of the mathematical value Pi. It's a reasonably hard thing for a processor to do and it has to be at least near to fully stable, in order to be able to calculate that many digits without any errors. The previous best on air cooling was 3001 MHz.
With the MCW6500-T the maximum overclock for this popular test went up 117 MHz to 3118 MHz. This is approaching crazy speeds for a Venice core CPU.
I really didn't have any time to do much else, so I just went for the highest "suicide" screenshot. This is aptly named as the aim of this overclock is to push the CPU as far as it will go until your system crashes. Sometimes the OS can get corrupted and you might have to reformat your computer in extreme cases.
3133 MHz! A whole 183 MHz faster than my previous record and 933 MHz above stock speed!
I felt the magic of overclocking again and the only thing that made me sad, was that I didn't have an Intel Core 2 Duo to test the MCW6500-T out on. I think the 65nm process of the current Intel Core 2 processors producing less heat and requiring less voltage, would gain stability and speed over plain air- or water-cooling.