eva2000

Yes I've gotten off my lazy butt... well partially off anyway

Time to dust off my Kayl Black FrozenSS 1/4HP phase change unit for some sub zero action. It's a real winter this year so hopefully lower room ambients with lower humidity and dew point temps will keep condensation to a minimum

Asus Commando getting treated:





This time decided against using red Liquid Electrical tape as it's too messy to clean up for when i revert to water cooling.

Instead I've gone for a different approach:

1. First, 3 layer coating of Electrolube Clear Protective Lacquer (CPL) (rated for -50C) on backside of motherboard and front (taped off the dimm slots, PCI/PCI-E slots, cpu socket and IDE/FDD connectors).
2. Then using clear nail polish for around cpu socket area sealing off under the cpu socket and caps and up to first dimm slot.
3. Instead of Liquid Electrical tape, using 3M Scotch Super 88 Vinyl tape for the initial covering layer of the board. Should be much easier to remove afterwards right ???? Or would heat from components eventual cause the Vinyl tape to melt and become sticky and thus hard to remove ??? The 3M Scotch Super 88 Vinyl tape is rated for -18C to 105C. We shall see
4. Then I'm going to cake the entire cpu socket in dielectric grease this time. Learnt my lesson from last time

As suggested by some folks over at XS forums, I've pealed back the vinyl tape from the mosfets near the edge of the motherboard cpu socket area so they're no longer covered. Got as far as the top layer foam cut out. Will tape down the edges of the top layer properly later on.

eva2000

I did a dry test mount with dielectric grease covering the whole cpu socket to see how things are.

Not sure if the very top layer of Aerotape sticky back foam (see last 2 photos) is too tall for a flat evap head which doesn't stick out ?? Or should I just remove that very top layer of Aerotape sticky back foam and mount to the Vinyl tape layer as seen here.





Anyway, for now left the top layer Aerotape sticky back foam intact for initial tests.

eva2000

System

• E6700 L629B079 B2
• Kayl Black FrozenSS 1/4HP
• Asus Commando 1001 bios
• 128MB Gainward FX5200 PCI
• 2x1GB Team 6400C3 Micron D9GMH
• 160GB Seagate 7200.7 SATA
• Pioneer DVR-08 Burner
• Sony FDD
• 620W Corsair HX620 Modular PSU
• WinXP Pro SP2

I completed Super Pi 32M @4200Mhz - 10x420FSB 1:1 4-4-4-5 at 1.628v but when taking screenshot it rebooted!

So I bumped vcore to 1.688v (1.70 bios set) and now 32M is stable @4200Mhz but hitting a wall >4230Mhz at this vcore. I guess this E6700 L629B079 ain't that good as it only did Super Pi 32M max @3904Mhz at 1.672v on water cooling (Swiftech G4 Storm/Thermochill 120.3/MCP650).

@stock E6700 speeds
Evap idle = -44.4C
Bios cpu temp = -39.5C

@4200Mhz at 1.688v
Evap idle = -40.5C to -39.2C
Evap load = -37.8C to -36.5C
Bios cpu temp = stuck at 9C doesn't move

Untweaked 1:1 memory divider Super Pi 32M runs to see how stable the system is

I had to boot in from 400FSB and used Systool to bump FSB up to 420-467FSB. SetFSB refused to load for me - giving me 'startup failed' messages everytime i tried to run SetFSB so sticking with Systool.

eva2000

I tightened the evap bolts and much of made better contact with cpu E6700 as got -43C in bios at stock speeds and PC Probe2 now shows something other than 9C

eva2000

Progression in Super Pi 32M times at different FSB/MEM configurations with 2x1GB Crucial Ballistix Tracer PC2-8500 Micron D9GMH modules (unless otherwise stated)

System

• E6700 L629B079 B2
• Kayl Black FrozenSS 1/4HP
• Asus Commando 1001 bios
• 128MB Gainward FX5200 PCI
• 2x1GB Crucial Ballistix Tracer PC2-8500 naked modules cooled by 3x 60x25mm Sunon 23.5cfm Maglev fans
• 160GB Seagate 7200.7 SATA
• Pioneer DVR-08 Burner
• Sony FDD
• 620W Corsair HX620 Modular PSU
• WinXP Pro SP2

• 12m 15.125s - 4199.9Mhz - 10x420FSB 1:1 420Mhz 4-4-4-5 3-30-3-9-8-9 (2x1GB Team 6400C3 Micron D9GMH)
• 12m 08.594s - 4000.0Mhz - 10x400FSB 2:3 600Mhz 5-5-4-5 3-25-4-10-5-10
• 12m 00.672s - 4036.5Mhz - 10x403FSB 2:3 605Mhz 5-5-4-5 3-25-4-10-5-10
• 11m 52.657s - 4220.9Mhz - 9x469FSB 1:1 469Mhz 4-4-4-5 3-25-3-9-6-9
• 11m 50.031s - 4230.0Mhz - 9x470FSB 1:1 470Mhz 4-4-4-5 3-25-3-9-6-9
• 11m 47.484s - 4200.0Mhz - 10x420FSB 4:5 525Mhz 5-4-4-5 4-25-3-10-6-10
• 11m 45.844s - 4199.9Mhz - 8x525FSB 1:1 525Mhz 4-4-4-5 3-25-3-9-4-9
• 11m 43.406s - 4229.9Mhz - 10x423FSB 4:5 528Mhz 5-4-4-5 4-25-3-10-6-10
• 11m 39.500s - 4255.9Mhz - 8x532FSB 1:1 532Mhz 4-4-4-5 3-25-3-9-4-9
• 11m 39.016s - 4200.0Mhz - 10x420FSB 2:3 630Mhz 5-5-5-9 5-25-10-10-9-10
• 11m 37.266s - 4229.9Mhz - 10x423FSB 2:3 634Mhz 5-5-5-9 5-25-10-10-9-10 <== time enough to be placed in hwbot.org 32M rankings at #100 position!

Room temp = 23.5C
Evap temp idle = -40.5C
Evap super pi temp (load) = -36.5C



Did the full list of Super Pi tests from 1M through to 32M



Seem to have hit a wall around 4230Mhz and/or cpu vcore limited to around 1.688-1.696v according to Asus PC Probe2 at 1.7v and 1.75v respectively. 1.7625v and higher jumps to 1.808v vcore but doesn't help with >4230Mhz so far.

Power consumption wise, I had the system hooked up to my Power-mate wattage meter to see how much power draw from mains power was with the Super Pi benching session @4230Mhz at 1.688v (Kayl Black FrozenSS 1/4HP unit excluded from the power draw only the system measured).

Peak wattage = 264.4 Watts
System off standby wattage = 4.4 Watts

eva2000

Time to push the FSB.. while this E6700 L629B079 is my worse clocking cpu on water, it's also my highest FSB capable cpu out of all my core2 cpus @514FSB on water (my other cpus max at 490-505FSB on water).

So to start off with 4000Mhz - 8x500FSB 1:1



Then 8x525FSB 1:1



My highest FSB ever @8x532FSB 1:1

Evap idle = -40.8C
Evap load = -37.2C
Room temp = 22.8C
Power-mate load measured at mains = 267.6 Watts peak

eva2000

Looks like I'm pretty sure it's the E6700 L629B079 at fault (poor clocker) as I swapped in my E6600 B1 ES QPGE and

At stock 9x266FSB 1.268v:

Room temp = 23.5C
Bios = -44.5C
Evap temp idle = -44.5C

Systool Dual 32M Pi tests
@9x456FSB = 4104Mhz at 1.5v bios (1.48v)
@9x467FSB = 4202Mhz at 1.55v bios (1.536v)
@9x478FSB = 4302Mhz at 1.60v bios (1.584v)
@9x480FSB = 4320Mhz at 1.65v bios (1.640v) - PC Probe2 = -13C load in windows / Evap load temp = -34.9C
@9x485FSB = 4367Mhz at 1.65v bios (1.640v)
@9x489FSB = 4401Mhz at 1.675v bios (1.664v) - PC Probe2 = -9C load in windows / Evap load temp = -33.4C

Pencil vdroop mod still in place

Teccxpert

eva2000, do you ever try any of these o/c experiments with 2 x 2Gb DDR2?