The DFI JR X58-T3H6 shipped with a pre-release 1/14 bios as I had this board way before it was available via retail channels. The official shipping bios was 1/15. So I flashed to 2/27 bios to start the tests.

System:

• i7 920 3836A756 C0 #2
• EK Supreme LT 1366 / FESER 480 / MCP655
• DFI JR X58-T3H6 2/27
• 6GB OCZ Platinum DDR3-1333Mhz 7-7-7-24 (OCZ3P1333LVA6GK 'Animal Series')
• 750GB Samsung SATAII
• Silverstone OP1200 PSU
• WinXP Pro SP3

First cpu to test is my second i7 920 3836A756 C0 cpu. You could say this is worst i7 920 cpu out of my four i7 920 c0 and d0 cpus in terms of vcore needed for 4Ghz on DFI UT X58-T3EH8 which was approximately 1.392v on TRUE120 air cooling. Now to see how this cpu fairs on DFI JR X58-T3H6

Now on DFI JR X58-T3H6, it's interesting to note the differences out of the board compared to DFI UT X58-T3EH8.

• AUTO vcore differences: on DFI UT X58-T3EH8, auto vcore for this cpu was 1.184v idle/1.168v load. On DFI JR X58-T3H6, auto vcore for this cpu was 1.136v idle / 1.152v load.
• CoreTemp 0.99.5 Build 20: on DFI UT X58-T3EH8, core 0 + 2 where hotter than core 1+3. On DFI JR X58-T3H6, core 0 + 3 are hotter than core 1 + 2.
• CPU VTT bios set vs SG reported voltage: on DFI UT X58-T3H8, bios set CPU VTT at idle was close to what SmartGuardian app reported. For example, 1.31v CPU VTT bios set, SG reported 1.31v idle and 1.33v load. But on DFI JR X58-T3H6, CPU VTT bios set to 1.31v is undervolted in SG at 1.24v idle and 1.26v load. Haven't measured multimeter yet as there is no easy DMM read points on JR board like on the UT version.
• VDIMM undervolting in SG: SG on DFI JR X58-T3H6 reports memory voltage as undervolted i.e. 1.635v and 1.65v bios set vdimm = 1.61v and 1.63v in SG app. Whereas, on DFI UT X58-T3EH8, SG would report them as 1.64v and 1.66v respectively.

Idle



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