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Looking at X79. I have some questions I'd like help with please?

post #1 of 3
Thread Starter 
I've been looking at the X79 UD3.
I have a concern with this board. Will a Thermalright Silver Arrow obstruct a 7970 in the PCI-E slot 1? I've noticed the CPU socket is close to the first slot.
In terms of overclocking, I've seen many users push the base clock to 120MHz or more. What's the deal? I thought you should keep it below 105 as seen on the Z68/Z77 Chipset. Does the multiplyer overclocking method work?

Can you suggest another board which is cheap, overclocks, uses 16x x16 pci-e 3.0 and allows full compatibilty with my Silver Arrow?
Thank you very much for the help smile.gif
X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
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EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
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BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
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Logitech G400s Senn HD 598 
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X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
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post #2 of 3
That Silver Arrow is a monster cooler, it doesn't look to me like there's enough room on the UD3, hopefully someone will chime in that has actually tried to fit one. If I were you, I'd take a look at the ASUS P9X79 Deluxe - it has a little more room between the edge of the DIMM slots and the first PCIe x16 slot. That 3/8" of additional space might make or break it.

I ended up going with a Corsair H100i for my X79 build, and I'm glad I did. Dang Socket 2011 coolers are too obnoxiously large for my taste.

The thing you see with X79 platforms is BLCK "strap". The "strap" sort of works like this: If you set the BCLK to 100.0, that sets the PCIe base clock, CPU core clock, and IMC clock all to 100 MHz base. If you set the BCLK to 125, then the chipset snaps to the 125 strap, and resets the base PCIe clock to 100 MHz but the CPU and IMC then get a 125 MHz base clock. This lets you go do things like overclock a i7-3820 beyond it's normally-locked maximum multiplier clock rate. I forget what the 3820 multiplier limit is, like x42 I think. So normally you'd be stuck at 100.0 BCLK * 42 =- 4.2 GHz. With the 125 MHz strap, you can set it to say 5 GHz by going 125 * 40x multiplier, and the PCIe bus will still get 100.0 and remain stable.

Where it gets tricky is when people start mixing strap with BCLK adjustments that don't fall on the step. It will snap the CPU core speed to the nearest strap, and the PCIe bus will get the difference between the strap and the set point. So, say you have the BCLK set to 120 MHz. That's closer to the 125 MHZ strap than the 100 MHz strap point, and it's 5 MHz less than the strap. If I understand it right, that would put the PCIe bus at 95 MHz (125-120) and the CPU core at 120 MHz. Keep in that adjusting the BCLK and strap ALSO OC the RAM, so if you set a 120 MHz BCLK, the PCIe bus might get 95 MHz but the CPU core and IMC are going to get 120 MHz. Calculate the RAM clock rate accordingly, you might need to "downclock" the RAM, then "upclock" it back up taking the BCLK into account. LOL. Good luck.

I could be wrong. I don't dick with the straps because I can get the OC I want using just a multiplier change. =)

Greg
Edited by hammong - 3/20/13 at 10:33pm
post #3 of 3
Thread Starter 
Thank you. Very helpful. Repped.
X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
  hide details  
Reply
X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
  hide details  
Reply
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