death metal
08-19-2006, 11:51 PM
I know EPP stands for Enhanced Performance Profiles that works only on NFORCE chipset, a certain memory (Corsair IIRC), and AMD, so I coined a different meaning for the EPP and called it Extreme Processor Profile pertaining to X6800 :slap: :banana:
Anyway, just want to share some of my findings:
::Test Processor::
Intel速 Core™ 2 Extreme X6800 (2.93Ghz) ES B5/Reference Stock Cooler
::Other Processors::
Intel速 Core™ 2 Duo E6300 (1.86Ghz) ES A1 Stepping
Intel速 Core™ 2 Duo E6600 (2.39Ghz) ES A1 Stepping
::Common Components::
Intel速 D975XBX i975 Rev304
2x512MB Micron DDR2-PC5300@D@CL5-5-5-15(Auto)
Powercolor* X800GT 256MB
Seagate* Barracuda 120GB x2 RAID 0
OEM DVD Drive
Sony 1.44Mb
Thermaltake* LanParty
HEC* WinPower 550
Windows* XP SP2
Stable Overclock (All settings on stock except Multiplier):
X6800 = 266x14 (3.72GHz)
Stable Overclock (All settings on stock except FSB):
E6300 = 333x7 (2.33GHz)
E6700 = 333x9 (2.99GHz)
Partial theory on data above: No need to change vCore or vMCH or any other settings on motherboard since FSB at 333MHz is passing and can handle 3.7GHz speed.
However,
Unstable Overclock (All settings on stock except FSB)
X6800 = 333x11 (3.66GHz)
At same FSB, and with CPU now with lower in frequency, the overclock is unstable. Is the CPU failing at such speed, but it can do 3.72GHz. Is the FSB the culprit, but it can do way more than 333MHz in other tests. Is FSB termination voltage not enough, but I have tweaked that to the highest available settings. Why is 266x14 (3.72GHz) stable and why is 333x11 (3.66GHz) even if motherboard, and RAM are pre-tested to work way beyond such settings except when using with an X6800?
Theory:
Bad Axe is adjusting vCore for each multiplier change, aka EPP =)
Temperature:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/temp.gif
vCore Reading:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/vcore.gif
Raw Data:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/dataepp.gif
No conclusion =), let me know if you get similar findings =) so I can finalize if my observation is corect.
Anyway, just want to share some of my findings:
::Test Processor::
Intel速 Core™ 2 Extreme X6800 (2.93Ghz) ES B5/Reference Stock Cooler
::Other Processors::
Intel速 Core™ 2 Duo E6300 (1.86Ghz) ES A1 Stepping
Intel速 Core™ 2 Duo E6600 (2.39Ghz) ES A1 Stepping
::Common Components::
Intel速 D975XBX i975 Rev304
2x512MB Micron DDR2-PC5300@D@CL5-5-5-15(Auto)
Powercolor* X800GT 256MB
Seagate* Barracuda 120GB x2 RAID 0
OEM DVD Drive
Sony 1.44Mb
Thermaltake* LanParty
HEC* WinPower 550
Windows* XP SP2
Stable Overclock (All settings on stock except Multiplier):
X6800 = 266x14 (3.72GHz)
Stable Overclock (All settings on stock except FSB):
E6300 = 333x7 (2.33GHz)
E6700 = 333x9 (2.99GHz)
Partial theory on data above: No need to change vCore or vMCH or any other settings on motherboard since FSB at 333MHz is passing and can handle 3.7GHz speed.
However,
Unstable Overclock (All settings on stock except FSB)
X6800 = 333x11 (3.66GHz)
At same FSB, and with CPU now with lower in frequency, the overclock is unstable. Is the CPU failing at such speed, but it can do 3.72GHz. Is the FSB the culprit, but it can do way more than 333MHz in other tests. Is FSB termination voltage not enough, but I have tweaked that to the highest available settings. Why is 266x14 (3.72GHz) stable and why is 333x11 (3.66GHz) even if motherboard, and RAM are pre-tested to work way beyond such settings except when using with an X6800?
Theory:
Bad Axe is adjusting vCore for each multiplier change, aka EPP =)
Temperature:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/temp.gif
vCore Reading:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/vcore.gif
Raw Data:
http://sleektech.nl/~dm/review/intel/d975xbx-epp/images/dataepp.gif
No conclusion =), let me know if you get similar findings =) so I can finalize if my observation is corect.