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AMD 770 Chipset basedGIGABYTE motherboards enable

Triple core CPU to be turned intoQuad core CPUProduct Management Team

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Introduction

Why it can be achieved?

Answer: When AMD produces multi-cores CPU, for some quality control issues,(such as extreme high or low temperature), AMD samples out some quadcore Phenom II / Athlon II CPU and turn it into triple core CPU for sale. Soinside of a triple core CPU, it is still a quad core internally.

How to enable it?

Answer : To enable triple core CPU into quad core CPU, you need AMD SB750/710 with EC circuit, special BIOS to allow AMD ACC (Advanced ClockCalibration) and AMD triple core CPU as well.

Whats benefit?

Answer : End user can get as a Free bonus by purchasing a triple core CPUand turning it into a more expensive quad core CPU without paying extra.Performance also gains too.

Warning : User has to be aware, AMD and

GIGABYTE will NOT honor and guarantee the

performance and success of enabling thisfeature. Also the system stability may be

effected.

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Gears you need

To enable GIGABYTE AMD 770 chipset MB, you need following gears :

Warning : User has to be aware, AMD and

GIGABYTE will NOT honor and guarantee the

performance and success of enabling thisfeature. Also the system stability may be

effected

Motherboard with AMD SB 750/710

+ special EC mode BIOS :

MA770T-UD3P F2CMA770-UD3(2.0) FB

MA770-US3(2.0) FB

AMD Phenom II or upcoming Athlon IITriple Core CPU

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Step by StepStep One : Enter BIOS and verify

Hint : By press F9 in BIOS, you can see hardware informationIt shows

current CPUis triple core

Phenom II X3

CPU

It shows

current

motherboard

model and

BIOS version

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Step by StepStep Two : Enter M.I.T Menu

M.I.T is

centre ofoverclocking

menu for

advanced

user

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Step by StepStep Three : Enter Advanced Clock Calibration mode

Enter AMD

ACC Menu

for enabling

special EC

firmware

In default, the EC

firmware will be set

as Normal mode,

and ACC is

Disabled. Now we

are prepared to

enable both.

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Step by StepStep Four : Enable Hybrid EC + ACC Auto mode

Enter EC firmwareselection menu, select

Hybrid mode to

enable special tuned

BIOS.

In ACC selection,

default is Disable ,

now go enabling

ACC in Auto mode

to enable Sb750/ SB710 ACC feature.

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Step by StepStep Five : Save and Exit BIOS

BIOS will automatically

update new EC firmware

and re-boot the system

again to apply quad core

setting.

Please do turn off or reset

system during processing.

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Step by StepStep Six: Verify it

After BIOS enables

Hybrid EC + ACC,you can see, in BIOS

hardware

information (F9)

The current CPU

now is AMD Phenom

II X4 8700e !

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Step by StepStep Six: Verify it in post

Before After

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Proof and Performance Test resultCheck ET6 under Windows 7 RC

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Proof and Performance Test resultPerformance Test result 1 : CineBench R10 Multi CPU score

Quad Core EC enable

Standard Triple Core

8015

6122

Quad Core EC enable

Standard Triple Core

148Watt

137 Watt

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Proof and Performance Test resultPerformance Test result 2 : 3DMark 05 CPU score

Quad Core EC enable

Standard Triple Core

Quad Core EC enable

Standard Triple Core

145Watt

140 Watt

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Summary

After tests we can say :

GIGABYTE Hybrid EC firmware with ACC works

Performance gains depends on application 3~30%

Enabling Quad Core will increase slightly more power

consumption

In test, with exclusive GIGABYTE technology, to enablethis hidden trick from AMD CPU is simple enough. No

hassle, no pain.

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Models available

MA770-UD3 (Rev.

2.0)

MA770-US3 (Rev. 2.0) MA770T-UD3P