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Same I7 920, yet different results ...

post #1 of 4
Thread Starter 
Long story short :

1. I have an I7 920 REV C0 as well as an I7 920 REV D0. The C0, up until a few days ago was on an UD3R REV 1.6 Motherboard.


On this Gigabyte motherboard, my C0 seemed to be suffering. For example, I could never boot up windows successfully at 3.8 GHz with a lover VCORE than 1.29. Stability wise, I had to put DVID so the voltage would fluctuate between 1.29 and 1.312 in order to pass LinX, Prime 95 and IBT. On the memory chapter, I have G-SKILL CL7 1333MHz, I know kind of sad, and I could never take them past 1350MHz (not even with 1.65v). I had to change my multi to x6 from x8 because I would never boot at this speed.

2. My I7 REV C0 is on a Rampage Formula III PCGH and everything is totally different. My first shock was that I booted without a hitch at 1.59V with my memory at 1380 MHz. My I7 REV C0 is at 4.0 GHz now and using 1.28 V. No boot lock ups, not prime problems so far! I am running prime for 45 minutes now and no BSOD.


From the above, you can see my astonishment. How can my C0 work on my Rampage with such low Voltage? Not even in my dreams I could boot 4.0 GHz @ 1.28V without a clock interrupt error. My memory is at over 1400 MHz now and fully stable!!! Unbelievable!!

IBT Passed, Prime95 goes on and on ... . Why are there such differences???
 
QUEEN OF BLADES
(15 items)
 
ASUS U6Sg
(15 items)
 
CPUMotherboardGraphicsRAM
I7 920 REV D0@4.2 HT Asus Rampage II Extreme CFX: ASUS R9 270X DCUII 6GB DDR3 XMP CL6 TRIDENT 
Hard DriveOptical DriveCoolingOS
Vertex 2 180 GB+RAID 0 2 * 1 TB SAMSUNG Sony Optiarc Labelflash Thermalright Venoumous X W7 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
Dell U2410 IPS Logitech Corsair CMPSU-850TX Antec 1200 
MouseMouse PadAudio
Logitech HAMA Xonar STX / Auzen Forte 
CPUMotherboardGraphicsRAM
XEON 5650X @4.45 GHz  Rampage III Formula PCGH CFX: ASUS R9 280X DCUII 16GB G-SKILL CL9@ 1643 MHz 
Hard DriveOptical DriveCoolingOS
1x 850 Pro 256 GB + 1xWD 500 GB + 2x3TB WD RED Plextor PX-L89OSA Thermalright VX W10 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
ACER B203W Razer Deathstalker Corsair CMPSU-750TX Antec 902 
MouseMouse PadAudio
Logitech G800S Logitech Gaming  Creative Titanium HD + FiiO E17 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo : T8300 Asus U6000Sg Series Notebook NVIDIA 9300 GS 4GB Kingston CL4 
Hard DriveOptical DriveCoolingOS
Hitachi Ultrastar Asus POS Stock Asus with MX3 W7 x64 Ultimate RETAIL 
MonitorAudio
Asus 12.1 " LED Creative X-Fi EX54 
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QUEEN OF BLADES
(15 items)
 
ASUS U6Sg
(15 items)
 
CPUMotherboardGraphicsRAM
I7 920 REV D0@4.2 HT Asus Rampage II Extreme CFX: ASUS R9 270X DCUII 6GB DDR3 XMP CL6 TRIDENT 
Hard DriveOptical DriveCoolingOS
Vertex 2 180 GB+RAID 0 2 * 1 TB SAMSUNG Sony Optiarc Labelflash Thermalright Venoumous X W7 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
Dell U2410 IPS Logitech Corsair CMPSU-850TX Antec 1200 
MouseMouse PadAudio
Logitech HAMA Xonar STX / Auzen Forte 
CPUMotherboardGraphicsRAM
XEON 5650X @4.45 GHz  Rampage III Formula PCGH CFX: ASUS R9 280X DCUII 16GB G-SKILL CL9@ 1643 MHz 
Hard DriveOptical DriveCoolingOS
1x 850 Pro 256 GB + 1xWD 500 GB + 2x3TB WD RED Plextor PX-L89OSA Thermalright VX W10 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
ACER B203W Razer Deathstalker Corsair CMPSU-750TX Antec 902 
MouseMouse PadAudio
Logitech G800S Logitech Gaming  Creative Titanium HD + FiiO E17 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo : T8300 Asus U6000Sg Series Notebook NVIDIA 9300 GS 4GB Kingston CL4 
Hard DriveOptical DriveCoolingOS
Hitachi Ultrastar Asus POS Stock Asus with MX3 W7 x64 Ultimate RETAIL 
MonitorAudio
Asus 12.1 " LED Creative X-Fi EX54 
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post #2 of 4
Because the Rampage III Formula is a high end board meant for heavy overclocking, and has much higher quality components, where as the Gigabyte is more of a budget board for X58 - you get what you pay for

Similar thing happened to me when I bought my first X58 board, ASRock X58, had good "specs" for a budget board, but wouldn't overclock past 3.8GHZ and voltage over 1.3v would just shut the computer off. Sent it back to Newegg, swapped for a Rampage III Formula and it overclocks like a dream
The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
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The Laptop
(6 items)
 
  
CPUGraphicsRAMHard Drive
Intel i7 2860QM AMD Radeon HD 6770M Corsair Vengence 1600MHz Samsung 840 Pro 256GB 
OSMonitor
Mac OS X 10.8 1680 x 1050 anti-glare high resolution  
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post #3 of 4
Thread Starter 
Thanks for your answer. I was extremely mislead by all the review sites. The Gigabyte in question won so many awards as best bang for buck, yadda yadda. The money I saved on the mobo allowed me to go CFX without changing my budget so you can imagine my disappointment when it failed to overclock like on the review sites. I sucked it up for a year until I saw that I was in desperate need for a new mobo. I looked at the best ATX form for my Antec 902 and it was the RIIIF and what a choice I made!

I am running SuperPi @ 4.4GHz with HT on 1.39 Voltage and it passed. I doubt it is very stable but with the Gigabyte I could never boot 4.4GHz with HT on with this C0. I even tried 1.55V once and It failed. The best I did was 4.3 HT off with 1.55V which was prime 95 stable. That is a huge difference in voltage!!
 
QUEEN OF BLADES
(15 items)
 
ASUS U6Sg
(15 items)
 
CPUMotherboardGraphicsRAM
I7 920 REV D0@4.2 HT Asus Rampage II Extreme CFX: ASUS R9 270X DCUII 6GB DDR3 XMP CL6 TRIDENT 
Hard DriveOptical DriveCoolingOS
Vertex 2 180 GB+RAID 0 2 * 1 TB SAMSUNG Sony Optiarc Labelflash Thermalright Venoumous X W7 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
Dell U2410 IPS Logitech Corsair CMPSU-850TX Antec 1200 
MouseMouse PadAudio
Logitech HAMA Xonar STX / Auzen Forte 
CPUMotherboardGraphicsRAM
XEON 5650X @4.45 GHz  Rampage III Formula PCGH CFX: ASUS R9 280X DCUII 16GB G-SKILL CL9@ 1643 MHz 
Hard DriveOptical DriveCoolingOS
1x 850 Pro 256 GB + 1xWD 500 GB + 2x3TB WD RED Plextor PX-L89OSA Thermalright VX W10 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
ACER B203W Razer Deathstalker Corsair CMPSU-750TX Antec 902 
MouseMouse PadAudio
Logitech G800S Logitech Gaming  Creative Titanium HD + FiiO E17 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo : T8300 Asus U6000Sg Series Notebook NVIDIA 9300 GS 4GB Kingston CL4 
Hard DriveOptical DriveCoolingOS
Hitachi Ultrastar Asus POS Stock Asus with MX3 W7 x64 Ultimate RETAIL 
MonitorAudio
Asus 12.1 " LED Creative X-Fi EX54 
  hide details  
Reply
 
QUEEN OF BLADES
(15 items)
 
ASUS U6Sg
(15 items)
 
CPUMotherboardGraphicsRAM
I7 920 REV D0@4.2 HT Asus Rampage II Extreme CFX: ASUS R9 270X DCUII 6GB DDR3 XMP CL6 TRIDENT 
Hard DriveOptical DriveCoolingOS
Vertex 2 180 GB+RAID 0 2 * 1 TB SAMSUNG Sony Optiarc Labelflash Thermalright Venoumous X W7 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
Dell U2410 IPS Logitech Corsair CMPSU-850TX Antec 1200 
MouseMouse PadAudio
Logitech HAMA Xonar STX / Auzen Forte 
CPUMotherboardGraphicsRAM
XEON 5650X @4.45 GHz  Rampage III Formula PCGH CFX: ASUS R9 280X DCUII 16GB G-SKILL CL9@ 1643 MHz 
Hard DriveOptical DriveCoolingOS
1x 850 Pro 256 GB + 1xWD 500 GB + 2x3TB WD RED Plextor PX-L89OSA Thermalright VX W10 X64 Ultimate RETAIL 
MonitorKeyboardPowerCase
ACER B203W Razer Deathstalker Corsair CMPSU-750TX Antec 902 
MouseMouse PadAudio
Logitech G800S Logitech Gaming  Creative Titanium HD + FiiO E17 
CPUMotherboardGraphicsRAM
Intel Core 2 Duo : T8300 Asus U6000Sg Series Notebook NVIDIA 9300 GS 4GB Kingston CL4 
Hard DriveOptical DriveCoolingOS
Hitachi Ultrastar Asus POS Stock Asus with MX3 W7 x64 Ultimate RETAIL 
MonitorAudio
Asus 12.1 " LED Creative X-Fi EX54 
  hide details  
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post #4 of 4
It's a good board, but as mentioned above, you get what you pay for. It might have won many awards for best bang for your buck, but bang for your buck doesn't translate into 'best performance.

Sent from my HTC Desire Z using Tapatalk.
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