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 Post subject: SPP and MCP?
 Post Posted: July 23rd, 2007, 2:21 pm 
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Joined: June 19th, 2007, 4:17 pm
Posts: 63
Location: USA
Hey,
I was wondering what the relationship the NB(SPP) and SB(MCP) on the 680i boards have to overclocking the CPU?

I have read of users increasing the voltage on the SPP when oc'ing
but how does that effect CPU performance?

FYI, I am not oc'ing the RAM atm.

thanks..

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E6750 C2D @ 3.6 ghz
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4 GB Corsair PC-6400C4* Thermaltake Armor
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Swiftech LCS: Apogee GTX {bowed},MCP655 pump, MCR220 Rad,
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 Post subject:
 Post Posted: July 24th, 2007, 10:17 am 
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Joined: May 29th, 2007, 10:14 pm
Posts: 581
Location: SoCal, USA
I don't know all the technical details, but the memory controller is on the northbridge as is the control for the FSB. Just like a CPU, running these faster will generate more heat. Too much heat leads to instability, as you know. You'd do a voltage bump for that same reasons you'd do it on a CPU. Also, compared to other chipsets, the i680 is a power hog which means that it will typically run hotter than other chipsets (P965, 975X)

I suppose if you had an unlocked CPU, you could just OC by ramping up the multiplier, but that wouldn't give you the fine control you typically need when you are testing for your top possible OC.

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 Post subject:
 Post Posted: July 24th, 2007, 2:12 pm 
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Joined: June 19th, 2007, 4:17 pm
Posts: 63
Location: USA
Found out (in the manual) that the MCP(SB) controls the second PCIe slot the networking controller, and the Raid controller.

I am not using any of those so I could have an option there, will test
that out in a moment.

Still not sure what the NB(SPP) controls. I know the first PCIe slot, and the memory, but anything else?

_________________
E6750 C2D @ 3.6 ghz
EVGA 680i T1 * EVGA 8800 GTS 640 SC
4 GB Corsair PC-6400C4* Thermaltake Armor
Dual PSU's Xclio X14 650w ; Enermax 450w
Swiftech LCS: Apogee GTX {bowed},MCP655 pump, MCR220 Rad,
MCRES-MICRO, all 1/2"

XP SP 2


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 Post subject:
 Post Posted: July 24th, 2007, 7:15 pm 
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Joined: May 29th, 2007, 10:14 pm
Posts: 581
Location: SoCal, USA
Here you go.

http://www.anandtech.com/cpuchipsets/sh ... i=2869&p=3

Check the first picture; that shows everything quickly and clearly.

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MSI P55-GD65 / Intel Core i5-750 on Swiftech Apogee XT | 4GB OZC DDR3 | XFX 4890 on MCW60 | MCP655 Pump w/ EK D5 X-Top | MCR320+MCR220 Rads | Scythe S-Flex SFF21F (x5) on Scythe Kaze Master Ace Fan Controller[/b][/url]
Jab-Tech! My favorite mod & cooling supplier


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 Post subject:
 Post Posted: July 25th, 2007, 2:36 am 
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Joined: June 19th, 2007, 4:17 pm
Posts: 63
Location: USA
Hey thanks,

That answered my question. I guess the more that you OC the CPU, RAM, it is probably necessary to boost the SPP at some point
to handle the added bandwidth.

_________________
E6750 C2D @ 3.6 ghz
EVGA 680i T1 * EVGA 8800 GTS 640 SC
4 GB Corsair PC-6400C4* Thermaltake Armor
Dual PSU's Xclio X14 650w ; Enermax 450w
Swiftech LCS: Apogee GTX {bowed},MCP655 pump, MCR220 Rad,
MCRES-MICRO, all 1/2"

XP SP 2


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 Profile  
 
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