I've read that the 975 has an unlocked multiplier, but my multiplier caps at the stock value of 25. I can only overclock right now by increasing the FSB but the system is stable at 3.8 GHz with default voltage and good temps (40C idle, 70C load). I've tried changing Hyperthreading, Turboboost, and power-saving options.
Is something wrong or do I actually have to "unlock" the multiplier? Thanks!
OS: Windows 7 Ultimate x64
CPU: Intel Core i7-975 OC'd to 3.8GHz (25 multiplier, 152 FSB, default voltage, HT and TB off)
Mobo: Intel DX58SO BIOS v. 5456
RAM: Corsair XMS3 6GB DDR3-1600 (set at ~1500 mHz)
GPU: Radeon 6870 1GB
HDD: G.Skill Phoenix Pro 60GB, x1 W.D. Caviar Blue 640GB 7200 RPM, x1 Samsung F4 2TB, x2 Samsung F3 1TB
PSU: Kingwin Lazer 1000W
Cooler: ZALMAN CNPS9900ALED 120mm
if you have the 975 you should have the unlocked multiplier. Witch means that you should be able to put it at 30 if you want..hence the "unlocked" part. did u try entering the #s manually like manually entering the value that you want??
Thanks for the replies! Like I said, I can overclock fine by increasing the FSB but I'm just curious as to why the multiplier can't be increased over 25. The DX58SO BIOS doesn't let me manually enter in values either, I can only use "+" and "-" to change the multiplier.
BLCK = 150
PCIE = 100
CPU Ratio = 28
QPI = 7.200GT (I had to set this higher in my BIOS than it actually is. Windows see's it @ 6.4GT, which it stock.)
DRAM = 750MHz DDR3 1500 (stock is DDR3 1600 @ 9-9-9-27. DDR3 1500 is @ 8-9-9-26.)
CPU Voltage = Overdrive Offset @ 0.12500V
VTT Voltage = 1.340V
CPU PLL Voltage = 1.90V
Intel Speedstep & C-State are both Disabled.
Hyperthreading is Enabled, Turboboost is Disabled.