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ZOTAC NVIDIA 790i Ultra SLI Motherboard

By: Cameron Johnson | Socket AM3/AM3+ in Motherboards | Posted: Jun 25, 2008 4:00 am
TweakTown Rating: 91%Manufacturer: ZOTAC

BIOS

 

 

Moving into the BIOS; ZOTAC has used the Award 6 BIOS that NVIDIA recommends, and like NVIDIA's reference board, the layout of the features and settings are identical.

 

To get to the overclocking functions you need to go to the Advanced Chipset Features menu, from there you can access four separate sub menus that hold the overclocking systems.

 

 

Buses

 

FSB (QDR): 400 - 2800 in 1MHz Increments

 

Mem (DDR): 400 - 2500 in 1MHz Increments

 

PCIe x16_1 & x16_1: 100MHz to 200MHz in 1MHz Increments

 

PCIe x16_3: 100MHz to 200MHz in 1MHz Increments

 

SPP to MCP Ref Clock: 200MHz to 500MHz in 1MHz Increments

 

Voltages

 

CPU Core: 0.5125v to 2.0v in 0.0125v increments

 

CPU FSB: 1.2v to 1.55v in 0.05v increments

 

Memory: 1.5v to 2.275v in 0.025v Increments

 

nForce SPP: 1.3v to 1.55v in 0.05v increments

 

nForce MCP: 1.5v to 1.75v in 0.05v increments

 

GLTVRef Lane 0: -155mV to +155mV in 0.05mv increments

 

GLTVRef Lane 1: -155mV to +155mV in 0.05mv increments

 

GLTVRef Lane 2: -155mV to +155mV in 0.05mv increments

 

GLTVRef Lane 3: -155mV to +155mV in 0.05mv increments

 

Overclocking

 

 

With all the overclocking options in the BIOS available to us, we managed to hit a healthy 556MHz FSB. However, we did have to adjust every voltage in the system to rather high levels, including the GLTREFLANE voltages. This means we did hit the wall at the 550MHz level.

 

Important Editor Note: Our maximum overclocking result is the best result we managed in our limited time of testing the motherboard. Due to time constraints we weren't able to tweak the motherboard to the absolute maximum and find the highest possible FSB, as this could take days to find properly. We do however spend at least a few hours overclocking every motherboard to try and find the highest possible overclock in that time frame. You may or may not be able to overclock higher if you spend more time tweaking, or as new BIOS updates are released. "Burn-in" time might also come into play if you believe in that.

 

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