best 771 xeon board?

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best 771 xeon board?

Postby MrProto » Tue Feb 16, 2016 10:36 am

im currently using a dell precision 690 with 2 xeon x5365's and 8 4Gig sticks of 667Mhz ram. im wanting to upgrade to something less proprietary so i can use a standard power supply and new fans. this is and editing and gaming rig Priorities 1. standard psu 2. easy form factor 3.plenty pci-e slots(maybe sli) if the 771 to 775 processor mod is as simple as it looks i may also consider that
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Re: best 771 xeon board?

Postby Twisty » Tue Feb 16, 2016 11:13 pm

Easiest recommendation ever.
Intel skulltrail is the only decent choice for gaming on the 771 platform.
Back in 2011 I had one running two L5420 cpus which i picked up off ebay for $20 each.
So if youve already got the ram and cpus etc it might be worth picking up a board. The only odd thing remember about about it it is xatx format and of couse fbdimms.

Do weigh up the option of getting a more modern e.g. i5 bundle though, practically speaking even an old clocked i5 2500k will boss any 771 on games and there are various other advantages, usb3 on board, only 1 cpu/smaller , etc.
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Re: best 771 xeon board?

Postby MrProto » Wed Feb 17, 2016 7:37 pm

wow that's almost perfect. i would be sad losing half my ram and its listed as 5400 compatible but would my 5300 still work? im also curious what the best 775 board would be if i did the cpu mod strip
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Re: best 771 xeon board?

Postby MrProto » Wed Feb 17, 2016 7:38 pm

Twisty wrote:Easiest recommendation ever.
Intel skulltrail is the only decent choice for gaming on the 771 platform.
Back in 2011 I had one running two L5420 cpus which i picked up off ebay for $20 each.
So if youve already got the ram and cpus etc it might be worth picking up a board. The only odd thing remember about about it it is xatx format and of couse fbdimms.

Do weigh up the option of getting a more modern e.g. i5 bundle though, practically speaking even an old clocked i5 2500k will boss any 771 on games and there are various other advantages, usb3 on board, only 1 cpu/smaller , etc.


:) wow thanks
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Re: best 771 xeon board?

Postby Twisty » Wed Feb 17, 2016 11:12 pm

Sorry i forgot to post some some information.
Skulltrail supports sli, can even do 4 way sli in theroy although geometry of most cards limits to 3 cards in practice.

Back in 2011 i read the pinout schematics etc to see if i could hack a 771 into a 775 board and i found it was virtually impossible for reasons i can't remember. Ithink the pinout was easy to sort by piggybacking on an adapted 771 socket but there was some little thing to do with bios/northbridge comms that scuppered it.

To be honest, thinking about this again. If i were you i would just stick with the dell 690. With a bit of care you can rewire the plugs on a standard psu to suit the dell and adapt the case to fit large fans or even watercooling.
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Re: best 771 xeon board?

Postby Karlsweldt » Thu Feb 18, 2016 6:51 am

Dell (and a few others) wanted any repair or replacement parts to come only from their own source.. not be "off the shelf" as with standard parts. Keyword is "proprietary".
Wire colors and pinout of the motherboard power plug were different. Using a standard ATX PSU could destroy a Dell motherboard, and if a Dell PSU were used on a standard motherboard, same result. The PSU could be trashed as well.
They now use a 'standard' design on most products.
This link has a diagram of how the Dell ATX power plug is wired.
http://www.informit.com/articles/article.aspx?p=339053
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Re: best 771 xeon board?

Postby Karlsweldt » Thu Feb 18, 2016 4:56 pm

Found another pinout diagram in my archives..

Standard ATX power plug.. Dell's connections are different!
............Pin 1............Pin 11
Orange +3.3.....|0..0|..+3.3 Orange
Orange +3.3.....|0..0|..-12 Blue
Black gnd........|0..0|......gnd Black
Red +5...........|0..0|.....PS_on Green
Black gnd........|0..0|.....gnd Black \\ (latch)
Red +5...........|0..0|.....gnd Black // (latch)
Black gnd........|0..0|......gnd Black
Gray PSgood....|0..0|.....-5 White
Purple +5 SB....|0..0|....+5 Red
Yellow +12......|0..0|.....+5 Red
.............Pin 10........Pin 20

For Dell non-standard: Pin #s the same.

............Pin 1............Pin 11
Red +5.................|0..0|......PSON Gray
Black gnd.............|0..0|.......gnd Black
Red +5................|0..0|.......gnd Black
Black gnd.............|0..0|.......gnd Black
Orange PSgood......|0..0|....-5 White \\ (latch)
Purple +5 SB.........|0..0|......+5 Red // (latch)
Yellow +12...........|0..0|.......+5 Red
Blue -12..............|0..0|........+5 Red
Black gnd............|0..0|.........(blank)
Black gnd............|0..0|.......+5 Red
.............Pin 10..........Pin 20
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