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Old 28-05-2010, 04:02 AM   #38
eva2000
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eva2000's PC Specs
 
Join Date: Jul 22 2004
Location: Brisbane, Australia
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6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX scaling tests, when I reduced the Uncore frequency multiplier from 24x to 23x - I reduced the Uncore frequency from 4128Mhz to 4071Mhz. I knew I'd get a potentially higher max memory clock at 8-8-8-24 1T timings, but was surprised by how much extra. I managed to jump from DDR3-2064Mhz to DDR3-2124Mhz at the same voltages of 1.45v CPU VTT and 1.66v VDIMM all thanks to Core i7 980X's lower minimum Uncore to Memory ratio requirements!

6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
@DDR3-2124Mhz 8-8-8-24 1T at 1.66v
  • 23x 177bclk = 4071Mhz cpu frequency
  • 23x 177bclk = 4071Mhz Uncore frequency (cpuz reports it as NB frequency)
  • 18x 177bclk = 3186Mhz QPI frequency
  • 12x 177bclk = DDR3-2124Mhz memory frequency



6GB Kingston 2000CAS8 KHX2000C8D3T1K3/6GX
@DDR3-2230Mhz 8-8-8-24 1T at 1.66v


Managing to use TurboV to push bclk incrementally until I reached DDR3-2230Mhz 8-8-8-24 1T at 1.45v CPU VTT and 1.66v VDIMM !
  • 23x 186bclk = 4275Mhz cpu frequency
  • 23x 186bclk = 4275Mhz Uncore frequency (cpuz reports it as NB frequency)
  • 18x 186bclk = 3345Mhz QPI frequency
  • 12x 186bclk = DDR3-2230Mhz memory frequency



System:
  • Intel Core i7 980X 3951A763 B1 Step 2 ES
  • EK Supreme LT H20 + TFC480 + MCP655
  • Asus P6T6 WS Revolution 0609 beta bios
  • Sapphire HD5970 OC Edition 10.4 Official Catalyst Drivers
  • 6GB Kingston 2000C8 (KHX2000C8D3T1K3/6GX)
  • 750GB Samsung SATAII OS
  • 120GB OCZ Vertex SSD (DATA)
  • Pioneer DVR216 Burner
  • Corsair HX1000
  • WinXP Pro SP3 nlite + Windows 7 Ultimate 64bit RTM (fully updated) dual boot OS
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