Athlon X2 7750 BE Unlocked to Quad-Core

btarunr · Apr 25, 2009

Earlier this year, a Korean source had pointed out an easy method to enable a fourth core on the Phenom II X3. This was made possible by the way AMD has been designing its triple-core and dual-core processors based on the K10 "Stars" architecture: by disabling one or two cores on the quad-core die. "Sloppy" BIOS coding lead to the Phenom II X3 anomaly. It looks like a somewhat similar mod enables not one, but two cores on the sub-$100 Athlon X2 7750 Black Edition. A Korean technology website GiggleHD.com has reported a successful unlock of two cores.

The method is similar to that of the Phenom II X3 unlock: using flaws in BIOS code to enable cores, by enabling the "Advanced Clock Calibration" feature in the BIOS setup. The OS, Windows XP SP3, was able to see the processor as a "AMD Phenom(tm) FX-7750", while CPU-Z reads the name string correctly and lists the core count as 4. The motherboard in use is an ASRock A790GX/128M.

View at TechPowerUp Main Site

AlCabone · Apr 25, 2009

That explains the high power consumption of the chip. It's a native quad. Seems like AMD designed only two CPUs: Phenom and Phenom II, and they disable parts of them to get a complete market coverage.
I would rather like to see more efficient native dual- and tricores in the future.

Dark_Webster · Apr 25, 2009

Oh no, not again

. Why do they keep doing this? To save on material?

chaotic_uk · Apr 25, 2009

i wonder what mobo they used lol

Darknova · Apr 25, 2009

I knew I should have picked up a 7750BE when I had the chance...

z1tu · Apr 25, 2009

Can't wait to see more

Atom_Anti · Apr 25, 2009

AMD always so cool

! I am waiting for the new Phenom II X2 and hopfully will get X4 mod too...

X-TeNDeR · Apr 25, 2009

Me suspects a plot by AMD to rule the (CPU) world :wtf:

Seriously, think about it: AMD use all native-quads for their different lineups, and one day, slips a bios or some patch that unlocks dormant cores... if its true, AMD are w1zzards lol.
This gives their processors so much value, alot of heads (and wallets) will turn.

hooj · Apr 25, 2009

Nice cheap quad !!

npp · Apr 25, 2009

I enjoyed that about the world supremacy, sounds cool

) The only cath is that selling quad-cores for the price of dual-cores amid tough economical climate isn't exaclty what AMD needs right now. I would enjoy a crippled Phenom sold as a single-core Sempron, however. Now THAT would be a bargain

))

haffey · Apr 25, 2009

that's AWESOME. i might just have to build a whole entire computer because this is just a sick deal.

X-TeNDeR · Apr 25, 2009

^ Dont forget this isn't 100% sure and there is no guarantee whatsoever.
About what npp said: its all about volume. sell thousands of cheap parts, instead of hundreds of more expensive ones. if the average joe see the potential in buying a dual-core which is dirt-cheap, and unlocking it to tri or quad, he will sure be happy and buy loads of these chips. this has a good profit potential for AMD.

kenkickr · Apr 25, 2009

Looks like I'm gonna have to pull the 7750 back out and into my board on Monday to try this out.

Bjorn_Of_Iceland · Apr 25, 2009

Ima feels AMD did this on purpose so as to not trigger any suspicion of uncompetitiveness. Selling quads for a measly price disguised as a "fluke".

1Kurgan1 · Apr 25, 2009

AlCabone said:
That explains the high power consumption of the chip. It's a native quad. Seems like AMD designed only two CPUs: Phenom and Phenom II, and they disable parts of them to get a complete market coverage.
I would rather like to see more efficient native dual- and tricores in the future.

Dark_Webster said:
Oh no, not again . Why do they keep doing this? To save on material?

It's been known from the get go the 7750 was pretty much half a 9950. I had a 9850 and it clocked for crap, I managed to squeeze 3.2ghz bench stable out of it on the stock cooler, and 3.1ghz 24/7 clocks, but that was hard as hell to do.

Fast forward to a few weeks ago when I got my gf a 7750, I bumped the voltage up a few ticks, uped the multi to 3.3ghz and bam, no one issue. Thats on a stock cooler. I lined some 120mm's up to blow on the HS and now it runs at 39c under load, gonna go for 3.4ghz or more 24/7 clocks, that would have been very difficult to pull off in the 9850 or 9950. So they strategy in my mind is working fantastically!

WarEagleAU · Apr 25, 2009

lOOKS LIKE I NEED TO get me a sb750 board :_

z1tu · Apr 25, 2009

WarEagleAU said:
lOOKS LIKE I NEED TO get me a sb750 board :_

Yeah i thought the same thing :laugh:

Just waiting on some confirmation

1Kurgan1 · Apr 25, 2009

I already did a bit of testing, it's been set on Auto since I got it, that didn't do it. And setting all cores to 0% or -2% didn't unlock mine. But I got bored testing and bumped it up to 3.4ghz and 1.312v and stressing the crap out of it now, just passed wPrime 1024, such a nice little proc!

z1tu · Apr 25, 2009

1Kurgan1 said:
I already did a bit of testing, it's been set on Auto since I got it, that didn't do it. And setting all cores to 0% or -2% didn't unlock mine. But I got bored testing and bumped it up to 3.4ghz and 1.312v and stressing the crap out of it now, just passed wPrime 1024, such a nice little proc!

What mobo if I may ask, I need to change mine anyways since I can't get past 3 ghz

Darknova · Apr 25, 2009

1Kurgan1 said:
I already did a bit of testing, it's been set on Auto since I got it, that didn't do it. And setting all cores to 0% or -2% didn't unlock mine. But I got bored testing and bumped it up to 3.4ghz and 1.312v and stressing the crap out of it now, just passed wPrime 1024, such a nice little proc!

What you might need to do is reflash your BIOS with the very first Phenom II supporting version. That seems to be the one with the poor coding that allows the unlocking of CPUs.

I know I can unlock my 720BE on the BIOS version before this one, which was the first to support PII, and now I can't on the newer one (the older version was so buggy it made overclocking a chore).

felfin · Apr 25, 2009

Here is additional information.

http://forums.vr-zone.com/news-arou...an-unlocked-quad-core-update.html#post6666313

EarlZ · Apr 25, 2009

wait till they release a dualcore that is a native octa core :toast:

suraswami · Apr 25, 2009

Darknova said:
What you might need to do is reflash your BIOS with the very first Phenom II supporting version. That seems to be the one with the poor coding that allows the unlocking of CPUs.

I know I can unlock my 720BE on the BIOS version before this one, which was the first to support PII, and now I can't on the newer one (the older version was so buggy it made overclocking a chore).

why can't some one hack the bios and see which parameter opens these hidden cores? We will have a secret section available for logged in members only

And oh make sure that hack is set for NV boards too

But still PII rules :rockout:

felfin · Apr 25, 2009

http://gigglehd.com/zbxe/2249831#7

J.J Drangon did test in 3DMark for understand difference between Unlocked Kuma and Default Kuma.

z1tu · Apr 25, 2009

felfin said:
http://gigglehd.com/zbxe/2249831#7

J.J Drangon did test in 3DMark for understand difference between Unlocked Kuma and Default Kuma.

oh lol 1800 points more than default :eek:

System Name	RBMK-1000
Processor	AMD Ryzen 7 5700G
Motherboard	ASUS ROG Strix B450-E Gaming
Cooling	DeepCool Gammax L240 V2
Memory	2x 8GB G.Skill Sniper X
Video Card(s)	Palit GeForce RTX 2080 SUPER GameRock
Storage	Western Digital Black NVMe 512GB
Display(s)	BenQ 1440p 60 Hz 27-inch
Case	Corsair Carbide 100R
Audio Device(s)	ASUS SupremeFX S1220A
Power Supply	Cooler Master MWE Gold 650W
Mouse	ASUS ROG Strix Impact
Keyboard	Gamdias Hermes E2
Software	Windows 11 Pro

System Name	Lil'Lighty
Processor	Intel Core i3 530 @ Stock
Motherboard	Asus P7P55D
Cooling	Artic Cooling Freezer Pro Rev.2
Memory	Gskill Ripjaw 1600MHz 9-9-9-24 8GB
Video Card(s)	MSI GeForce GTX650 OC 1GB
Storage	WD Blue 500GB AAKS
Display(s)	ASUS 20'
Case	Aerocool Aeroengine II // Two 120mm Blue Fans
Audio Device(s)	Creative SoundBlaster LE // Logitech X-230
Power Supply	Corsair VX450W
Software	Windows 8.1 Pro x64

System Name	Chaos
Processor	Ryzen 7 5800X
Motherboard	Asus Strix B550
Cooling	6x 140mm + 360 mm Strix AIO
Memory	32Gb Corsair ddr4 3600mhz
Video Card(s)	Powercolor RX 6900 XT Red Devil
Storage	ADATA SX8200 + kingston savage 240 gb ssd x2 + 1tb toshiba 7200
Display(s)	AOC 32 inch Freesync monitor
Case	Game Max Silent Black
Audio Device(s)	HD Onboard
Power Supply	Corsair CP-9020094-UK RM1000x 1000 W 80 Plus Gold Certified
Mouse	corsair harpoon gaming mouse
Keyboard	BlackWeb wired gaming keyboard
Software	Windows 11 x64

Processor	AMD 5800X3D
Motherboard	Asus Strix B550-F Gaming
Cooling	Corsair H100i
Memory	2 x 32GB Corsair Vengeance
Video Card(s)	Sapphire Pulse 6800XT
Storage	1 x 1TB 980 PRO, 1 x 1TB Corsair MP510 Force
Display(s)	1 x Dell 27" 165hz
Case	Lian-Li O11D Evo
Audio Device(s)	Onboard
Power Supply	EVGA 1000W P2
Mouse	Logitech G502 Lightspeed
Keyboard	Logitech G915
Software	Windows 11 Pro x64

System Name	OptimusFine
Processor	AMD Ryzen 7 5800x
Motherboard	MSI B550 Tomahawk
Cooling	Noctua NH-D15 / 2x NF-S12A-PWM Chromax
Memory	Corsair Vengeance LPX CL15 3000mhz 32gb
Video Card(s)	Gigabyte RTX 3080 12GB Gaming OC
Storage	Samsung M.2 SSD 960 Evo 250GB / 2 Crucial SSD MX500 2TB & 1 1TB / Seagate 2TB Hdd / Toshiba 2Tb Hdd
Display(s)	Alienware AW3423DW, ASUS ROG PG279Q
Case	Cooler Master H500M
Audio Device(s)	Steelseries Arctis 7+ / Logitech Z533
Power Supply	Corsair RM850X
Mouse	Logitech G502 Lightspeed
Keyboard	Corsair Strafe RGB
VR HMD	Oculus Rift
Software	Windows 11 Pro 64-bit

Athlon X2 7750 BE Unlocked to Quad-Core

btarunr

Editor & Senior Moderator

AlCabone

New Member

Dark_Webster

chaotic_uk

Darknova

z1tu

Atom_Anti

New Member

X-TeNDeR

New Member

hooj

New Member

npp

haffey

New Member

X-TeNDeR

New Member

kenkickr

Bjorn_Of_Iceland

1Kurgan1

The Knife in your Back

WarEagleAU

Bird of Prey

z1tu

1Kurgan1

The Knife in your Back

z1tu

Darknova

felfin

New Member

EarlZ

New Member

suraswami

felfin

New Member

z1tu

System Name	3dfx High End PC
Processor	Intel Pentium 4 3.06GHz@3.7GHz
Motherboard	Abit SA7
Cooling	AC Freezer 4
Memory	512MB Patriot DDR600 TCCD
Video Card(s)	3dfx Voodoo 5 5500 AGP 193/193MHz
Storage	80GB 7200RPM Pata
Display(s)	19" LG Wide TFT-LCD
Case	Cooler Master
Audio Device(s)	integrated
Power Supply	400W
Software	Windows Millenium Edition
Benchmark Scores	3DMark2000: 7100 3DMark2001: 4100

Processor	AMD Athlon II X4 630 Propus C2 (2.8GHz) 95w
Motherboard	Asus M4A89GTD Pro/USB3 (AMD 890GX/SB850)
Cooling	Scythe Yasya+MX-3, 3x140mm+1x120mm case fans
Memory	Mushkin 2x2gb DDR3 1600MHz 6-8-6-24 1.65v
Video Card(s)	Club3D Radeon HD 4850 512mb (Stock Fan+MX-3)
Storage	WD 1TB SATA3 + WD MyBook 1TB ext+Toshiba 160gb ext
Display(s)	LG W2486L '24 FHD Led 1920x1080
Case	Lancool Dragonlord K62R1 (AMD Edition)
Audio Device(s)	ASUS Xonar DX+Microlab X16 2.1+Senn 448 'Phones
Power Supply	Seasonic M12II-620 80+ Bronze Modular
Software	Micro$oft Windows 7 Ultimate 64 Bit

System Name	First and last Custom build cus it was just too tedious.
Processor	i5 2500k
Motherboard	ASUS P8Z68-V LX
Cooling	Stock
Memory	G.Skill RipJaw X 2x 2GB
Video Card(s)	Inno3D 9600GT 512MB
Storage	Seagate Momentus XT 320GB
Display(s)	17" Proview LCD/ 19.5" Viewsonic Optiquest/ 19" LG Flatron LCD TV with the Red bit on it
Case	NZXT Source 220
Audio Device(s)	None
Power Supply	Corsair TX750 V2
Software	Windows XP Professional
Benchmark Scores	N/A

System Name	Kevin's Desktop
Processor	Q9550 @ 3.8 GHz
Motherboard	Asus P5E (Rampage Formula BIOS 0803)
Cooling	TRUE 120 (lapped to 10 micron)
Memory	2x2 GB Corsair Dominator DDR2 1066 MHz
Video Card(s)	Radeon HD 4870 1GB (830/1000 with T-Rad2)
Storage	160 GB WD (SATA) \| 2 x 250 GB Seagate (IDE) \| 1 TB WD (SATA)
Display(s)	Acer AL2216W 22" LCD
Case	Antec Nine Hundred
Audio Device(s)	Asus SupremeFX II
Power Supply	OCZ StealthXStream 600W

System Name	Addison Clark
Processor	Ryzen 9 7950x3D delid
Motherboard	Asus X670E Hero
Cooling	Custom Bykski loop CPU, GPU, 2x 360 rads, and 1x 280 rad with Arctic P12 and P14 ARGB fans
Memory	G.Skill DDR5-6000 64GB CL30
Video Card(s)	Gigabyte 4090 Aorus Master
Storage	Kingston Fury 2TB and 4TB NVME
Display(s)	Samsung 57"
Case	Lian Li O11 mini
Audio Device(s)	Onboard
Power Supply	Thermaltake 1000w SFX-L
Mouse	Corsair Dark Core RGB SE
Keyboard	Corsair K95 Platnium
Software	Win 11 Pro

System Name	Thakk
Processor	i7 6700k @ 4.5Ghz
Motherboard	Gigabyte G1 Z170N ITX
Cooling	H55 AIO
Memory	32GB DDR4 3100 c16
Video Card(s)	Zotac RTX3080 Trinity
Storage	Corsair Force GT 120GB SSD / Intel 250GB SSD / Samsung Pro 512 SSD / 3TB Seagate SV32
Display(s)	Acer Predator X34 100hz IPS Gsync / HTC Vive
Case	QBX
Audio Device(s)	Realtek ALC1150 > Creative Gigaworks T40 > AKG Q701
Power Supply	Corsair SF600
Mouse	Logitech G900
Keyboard	Ducky Shine TKL MX Blue + Vortex PBT Doubleshots
Software	Windows 10 64bit
Benchmark Scores	http://www.3dmark.com/fs/12108888

System Name	My Comp \| Fiancees Comp
Processor	i7 5820k @ 4.6Ghz 1.285v\| i5 2500k
Motherboard	MSI x99 SLI Plus \| AsRock Z77 Pro 3
Cooling	Watercooled
Memory	16GB DDR4 2400 @ 2666 \| 12GB DDR3 1600
Video Card(s)	AMD R9 290x \| MSI 5850 OC
Storage	128gb SSD + 2x 2TB \| 2TB
Display(s)	Asus 27" LCD \| 25" Hanns G
Case	CM Storm \| CM Elite 430
Audio Device(s)	Creative Recon 3D PCIe
Power Supply	Enermax Galaxy 1250W \| Rosewill 630w
Mouse	Logitech G700s \| Logitech G100s
Keyboard	Logitech G901 \| Logitech G105
Software	Win 8.1 Ultimate x64 \| Win 8.1 Ultimate x64
Benchmark Scores	3D Mark - Fire Strike Extreme - 4403

System Name	Pandemic 2020
Processor	AMD Ryzen 5 "Gen 2" 2600X
Motherboard	AsRock X470 Killer Promontory
Cooling	CoolerMaster 240 RGB Master Cooler (Newegg Eggxpert)
Memory	32 GB Geil EVO Portenza DDR4 3200 MHz
Video Card(s)	ASUS Radeon RX 580 DirectX 12 DUAL-RX580-O8G 8GB 256-Bit GDDR5 HDCP Ready CrossFireX Support Video C
Storage	WD 250 M.2, Corsair P500 M.2, OCZ Trion 500, WD Black 1TB, Assorted others.
Display(s)	ASUS MG24UQ Gaming Monitor - 23.6" 4K UHD (3840x2160) , IPS, Adaptive Sync, DisplayWidget
Case	Fractal Define R6 C
Audio Device(s)	Realtek 5.1 Onboard
Power Supply	Corsair RMX 850 Platinum PSU (Newegg Eggxpert)
Mouse	Razer Death Adder
Keyboard	Corsair K95 Mechanical & Corsair K65 Wired, Wireless, Bluetooth)
Software	Windows 10 Pro x64

Processor	Intel Core i7 2600K @ 4.8Ghz
Motherboard	Gigabyte P67A-UD4-B3 Rev1.1
Cooling	Noctua D14
Memory	4GB G.Skill 9-10-9-27-1T 2133Mhz
Video Card(s)	GTX580 1.5Gb
Storage	2x Samsung Spinpoint F3 1TB
Display(s)	Samsung T220
Case	Lian Li PC-P80
Audio Device(s)	X-Fi Extreme Music
Power Supply	Silverstone Strider Gold 850
Software	Windows 7 Ultimate x64

System Name	---
Processor	FX 8350 @ 4.00 Ghz with 1.28v
Motherboard	Gigabyte 990FX-UD3 v4.0, Hacked Bios F4.x
Cooling	Silenx 4 pipe Tower cooler + 2 x Cougar 120mm fan, 3 x 120mm, 1 x 200 mm Red LED fan
Memory	Kingston HyperX DDR3 1866 16GB + Patriot Memory DDR3 1866 16GB
Video Card(s)	Asus R9 290 OC @ GPU - 1050, MEM - 1300
Storage	Inland 256GB PCIe NVMe SSD for OS, WDC Black - 2TB + 1TB Storage, Inland 480GB SSD - Games
Display(s)	3 x 1080P LCDs - Acer 25" + Acer 23" + HP 23"
Case	AeroCool XPredator X3
Audio Device(s)	Built-in Realtek
Power Supply	Corsair HX1000 Modular
Software	Windows 10 Pro 64 bit