Essentials for Overclocking the 680i (NVIDIA Reference boards) - Page 7 - Overclock.net

ericeod · 01-20-08

Quote:

Originally Posted by KarmaKiller

alright..
Just flashed the bios, all went well. Upped the volts, and tried to boot at 3.57Ghz, and no joy. V-Core was set to 1.5, just to be sure that wasn't the issue. RAM was down to 800mhz, which it can run 1200mhz all day. SPP voltage was set to 1.5v, I left the other to AUTO setting.
Thoughts? Ideas?

(Thanks BTW for all the help) +Rep

NP, I'm always willing to help...

What about FSB voltage? Did you set it to 1.5v?

I know a lot of 680i A1 owners can usually reach 475 FSB, but struggle at 500, so you might just be at your chipset's limit.

**KarmaKiller** · 01-20-08

Bah... I was afraid that might be it too. I saw your post earlier in the thread about the step up program. I'm seriously considering doing that. I mean, ***, $90 and I got a 780ii board. Right?
I checked and there is like 22 days left to act, so I got to start kissing up to the woman..

The V-core was up to 1.5v to, so that's not it.. Just for giggle though, I turned down my multi, just to see if the chip would boot at 2045mhz, and it still didn't go. So that's why I'm leaning to the chips limit. Does that sound right? Or would the chipset still be limiting there?

ericeod · 01-20-08

Quote:

Originally Posted by KarmaKiller

Bah... I was afraid that might be it too. I saw your post earlier in the thread about the step up program. I'm seriously considering doing that. I mean, ***, $90 and I got a 780ii board. Right?
I checked and there is like 22 days left to act, so I got to start kissing up to the woman..

The V-core was up to 1.5v to, so that's not it.. Just for giggle though, I turned down my multi, just to see if the chip would boot at 2045mhz, and it still didn't go. So that's why I'm leaning to the chips limit. Does that sound right? Or would the chipset still be limiting there?

Yeah, that sounds right. But I wouldnt expect the 780i to be able to run too much higher of a FSB. It is the 680i chipset with an additional PCI-E 2.0 chip added to the board. See picture of the 780i northbridge:

**KarmaKiller** · 01-20-08

Hmm.. I think I've read that somewhere before. Not sure where..
I'm guessing that's why you jumped to the X38 in your sig rig?

shizdan · 02-06-08

i just read everysingle post in this thread and i gotta say to you all thankyou. great guide and i just flashed to p32 bios and ive been etting tips all day from this thread

The_Rocker · 02-14-08

I just got my evga 680i A1.

How do i carry out that v droop pencil mod then?

What do I have to do?

ericeod · 02-14-08

Quote:

Originally Posted by The_Rocker

I just got my evga 680i A1.

How do i carry out that v droop pencil mod then?

Just remove power for the board and wait for the power led to go out. Then take a pencil and trace over the top of the resistor (from red endpoint to red endpoint) labeled Vdroop as shown in the picture below. The lead of the pencil lowers the resistance of that resistor which reduces the vdroop.

Quote:

Originally Posted by ericeod

Here is the pencil vdroop mod. works AWESOME!!!!!!! Can't get over it. Might be chalked up as best mod of the year.
http://www.xtremesystems.org/forums/...d.php?t=154897

picture enlarged from xtremesystems member symphy's post.

I only needed 2-3 pencil strokes.

The_Rocker · 02-14-08

Done it and v droop is sorted. Now trying to get a stable q6600 overclock at 3.3 or more.

ericeod · 02-19-08

Here is the memory supported which can be found at eVGA's website on the support page under Motherboard Memory Support:

eVGA 780i/680i Series Memory support

*other memory modules may also work, the following are known compatible memory kits*

SLI Ready memory

Above 1066 MHz(Above PC2 8500)
Corsair TWIN2X2048-10000C5DF
Corsair TWIN2X2048-9136C5DF
Corsair TWIN2X2048-8888C4DF

1066 MHz(PC2 8500)
OCZ OCZ2N10662GK
OCZ OCZ2N10661G
Corsair TWIN2X2048-8500C5D
Corsair TWIN2X2048-8500C5
Kingston KHX8500D2K2/1G
OCZ OCZ2N1066SR2GK
OCZ OCZ2N1066SR1G
PNY D22GX85GMR

900 MHz(PC2 7200)
OCZ OCZ2N900SR2GK
OCZ OCZ2N900SR1G
OCZ OCZ2N9002GK
OCZ OCZ2N9001G

800 MHz(PC2 6400)
Corsair TWIN2X2048-6400C3DF
Corsair TWIN2X2048-6400C4D
Crucial BL2KIT12864AL804
Crucial BL12864AL804
Crucial BL2KIT12864AA804
Crucial BL2KIT6464AA804
Crucial BL12864AA804
Crucial BL6464AA804
Kingston KHX6400D2LLK2/2GN
Kingston KHX6400D2LLK2/1GN
Patriot PDC22G6400LLK
PNY D22GX64GMR-4

Standard Memory

Above 800 MHz(Above PC2 6400)
Kingston KHX9600D2D/2G
Kingston KHX9200D2/512
Kingston KHX8000D2K/2G
Kingston KHX7200D2K2/2G
Patriot PDC21G8000+XBLK
Patriot PDC21G8500 ELK
Crucial BL2KIT12864AL1005
G.SKILL F2-8000CL5D-4GBPQ
Mushkin XP2-1066

800 MHz(PC2 6400)
Mushkin XP-6400
Mushkin XP2-6400
OCZ OCZ2G8002GK
OCZ OCZ2P800R21G
OCZ OCZ2T8002GK
Corsair XMS6405v4.1
Corsair TWIN2X2048-6400
G.Skill F2-6400PHU2-2GBHZ
G.Skill F2-6400PHU2-2GBNR
G.SKILL F2-6400CL4D-2GBPK
G.SKILL F2-6400CL5D-4GBPQ
Team Xtreem PC2-6400 800MHz 3-3-3-8
Team Xtreem PC2-6400 800MHz 4-4-4-10
Patriot PDC22G6400ELK
Geil Ultra GX22GB6400UDC
Super Talent T800UX2GC4

667 MHz(PC2 5400)
Corsair VS512MB667D2
Buffalo D2V667C-1G/BJ
Patriot PDC21G5300LLK
PQI 5400 Turbo
Kingston KHZ5400D2K2/1G
Geil GX21GB5300SX
Muskin xp2 5300 2x1gb
Mushkin HP2-5300

533 MHz(PC2 4200)
Kingston KVR533D2/512R
PQI MAB412UOE 512MB DDR2 533
OCZ DDR2 OCZ2533512V

Page Updated: 12/19/2007

Choggs396 · 02-22-08

Someone was asking about the differences between the 680i LT SLI and the 680i SLI in another thread, so Ericoed thought I should post what I found on this thread for anyone that may need it.

The EVGA 680i LT SLI (122-CK-NF67-T1) is basically a cost reduced version of the standard 680i SLI (122-CK-NF68-A1 or T1). There are some differences in the MCP (southbridge) and other features, including the BIOS and memory capabilities.

This comparison provided by AnandTech of the 680i LT and 680i SLI illustrates some of the changes:

Quote:

We basically believe the 680i LT SLI SPP is a renamed 680i SLI SPP that has been feature reduced or more than likely neutered by the BIOS ... The real differences in the chipsets are in their choice of MCPs with the 680i LT utilizing the nForce 570 SLI MCP and the 680i SLI sporting the nForce 590 SLI MCP ... The 680i SLI offers full support for Enhanced Performance Profile (SLI-Ready) memory at speeds up to 1200MHz with the LT version only offering official 800MHz support. However, this only means you will have to tweak the memory speed and timings yourself in the BIOS ... We had no issue running our LT equipped board memory speeds up to 1275MHz

Other differences in the LT are less USB ports (8 opposed to 10) and only 1 Ethernet port (opposed to 2).

Ericeod has mentioned the 680i SLI AR and TR boards (opposed to A1 and T1) lack the proper GTL reference voltage modification, making them poor for Quad core overclocking. The LT boards also lacks this modification. Anandtech noticed this as well:

Quote:

Needless to say, quad core overclocking on the 680i platforms has been a huge disappointment until recently. There is a new hardware revision of the EVGA 680i board

Overall, it's not a bad board, IMO. It has definitely been shown to OC 65nm dual cores with great success. But it's definitely not the one you'd want for OC'ing a Quad Core CPU. I'd go with either a 680i SLI A1 or T1 (model 122-CK-NF68-A1 or T1).

The 780i (EVGA model 132-CK-NF78-A1) makes an even better choice for Quads, IMO - because it has specific GTL Reference Voltage adjustments options in the BIOS for each lane - making a higher, more stable Quad core overclock possible. This post on xtreview.com illustrates how GTL reference voltage adjustments can impact overclocking, especially on Quads.

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Essentials for Overclocking the 680i (NVIDIA Reference boards)

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