Saturday, April 25th 2009

Athlon X2 7750 BE Unlocked to Quad-Core

Apr 25th, 2009 06:01 Discuss (109 Comments)

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.

Source: Gigglehd.com

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109 Comments on Athlon X2 7750 BE Unlocked to Quad-Core

#51

z1tu

kenkickrLike all Deneb cores its default L3 is 2Mb. It's nice though you get the extra L1 and L2 cache as well.

Isn't 7750 a Kuma?:confused:

#52

Lo0odak

What about we are talking here?About unlocking x3 720 or x2 7750,and is that really possible on "Kuma"? :S

#53

z1tu

Lo0odakWhat about we are talking here?About unlocking x3 720 or x2 7750,and is that really possible on "Kuma"? :S

Well the original subject was the Kuma :D

#54

Lo0odak

Hehe,i buy Kuma before 20 days,and now that information i read,that is all on Korean WIN XP sp3,and we cant understand nothing...:) btw. i have biostar 790gxb, 7750 x2 3.1ghz at stock cooler,4gb ram...:)

#55

z1tu

Lo0odakHehe,i buy Kuma before 20 days,and now that information i read,that is all on Korean WIN XP sp3,and we cant understand nothing...:) btw. i have biostar 790gxb, 7750 x2 3.1ghz at stock cooler,4gb ram...:)

So did you try all that stuff with the ACC on auto?

#56

cdawall

where the hell are my stars

this is BA hopefully the AM3 phenom II dual cores will do the same uh oh

#57

Lo0odak

I want to set to AAC when i arrive home from work.P.s. sry for bad english...:) But i think that isnt possible with stock bios...i dont know...:(

#58

newtekie1

Semi-Retired Folder

OnBoardYeah, the E6300/6400 were the Conroes with damaged cache. But Allendales never had 4MB they were 2MB max and had the E1000 series made from damaged parts.

"E6300 and E6400 CPUs, as well as their Xeon 3040 and 3050 counterparts, have been made using the original 4 MB B2 stepping with half their L2 cache disabled prior to Q1 2007, but using the 2 MB L2 stepping later. This caused contention regarding whether or not the previously available versions were specimens of the Allendale core. Only the newer cores are now commonly referred to as Allendale."

If you talked just about the different steppings of the E6300, then it makes sense. For me Allendale is only E4000 and lower procs (having owned E4300), no-one bought the low multi E6300 after E4300 was out :)

There were two steppings of the E6300(B2 and L2). The B2 stepping was a Conroe core with half the cache disabled. The L2 stepping was a full Allendale core(the E4300 shares this stepping). Mainly the L2 stepping of the E6300 was only used to fill the last orders for the E6300. Originally, most refered to the E6300 and E6400 as Allendale cores, even though they used Conroe cores. It wasn't until the true Allendale core was released that people realized their mistake.

You are correct that sales for the E6300 dropped after the introduction of the E4300, that is why the E6320 was released to offer people something over the E4300.

#59

z1tu

Lo0odakI want to set to AAC when i arrive home from work.P.s. sry for bad english...:) But i think that isnt possible with stock bios...i dont know...:(

I think that the unlocking part was mainly because it was an old bios so might work

#60

Lo0odak

Then i need XP sp3 to see FX 7750?And 2 more cores,if that work really...Heh,im so confused about all with amd processors... :D

#61

captainskyhawk

This is probably the biggest deal of the past 10 years, even better than unlocking pipelines on old ATI cards and unlocking cache on old Durons

#62

z1tu

captainskyhawkThis is probably the biggest deal of the past 10 years, even better than unlocking pipelines on old ATI cards and unlocking cache on old Durons

Kind of... except the rate that it's possible to unlock the 2 cores on the 7750 is kinda small so far :D

#63

bnborg

My theory has always been that the tripple core CPUs were the quad core rejects.

I.e. that one of the four cores failed somewhere in the Q.C. testing.

#64

z1tu

bnborgMy theory has always been that the tripple core CPUs were the quad core rejects.

I.e. that one of the four cores failed somewhere in the Q.C. testing.

And I think that's 100% true somehow

#65

DaMulta

My stars went supernova

Wile EBecause the bigger market, with higher demand, is the lower end market. If the demand of the dual cores is too high, they have to start disabling good cores to make up for demand. It's basic economics. It's far better to disable the cores and move a ton of product at a reduced price, than it is to just let the low end run out of stock, and still have the lower volume quads also sitting on the shelf.

If they run out of the dual cores, people in that price range aren't going to buy the much more expensive quad, so now they sell neither the dual, nor the quad. Lose-lose for AMD.

This happens with Video cards too. If they 100 dollar chip is FLYING off the shelf, and they run out of it. They will pull from the most expensive bin, then then sell it off as the 100 dollar card.

The do the same thing with the cheap CPUs if they are selling very very well. Then they run out they will pull from the good BIN noting wrong with them, and sell them as the cheap CPUs.

Money coming in fast is better than having no product on the self with only high-end on top that sells slowly.

#66

1Kurgan1

The Knife in your Back

farlex85Quad for under $100, nice. When the 2 other cores are enabled, is their respective L3 cache enabled as well? Or do they use the cache for the other 2 cores?

farlex85Probably. I would think that would greatly hinder the other 2 cores as well, I mean the cache is fairly limited anyway. A core unable to access cache seems like it would be fairly useless comparatively speaking.

There is no more L3 to be unlocked, it is a Phenom 1st Gen chip. It is basically a 9950 with 2 cores cut off. So if your wondering at if those extra 2 cores would come in handy compare the performance of a 7750 vs a 9950.

The big thing I'm wondering is will those extra 2 cores being enabled kill the OC that the 7750 can dish out?

DaMultaThis happens with Video cards too. If they 100 dollar chip is FLYING off the shelf, and they run out of it. They will pull from the most expensive bin, then then sell it off as the 100 dollar card.

The do the same thing with the cheap CPUs if they are selling very very well. Then they run out they will pull from the good BIN noting wrong with them, and sell them as the cheap CPUs.

Money coming in fast is better than having no product on the self with only high-end on top that sells slowly.

And the other thing is, sometimes when a CPU is near the end of it's cycle it's just flat out more efficient to disable something and rebadge it then it is to toss a ton of money at having a whole new processor designed. And like I said earlier the 9950's are too close in price to the 710's so there just isn't going to be much of a market for those at all.

#67

z1tu

1Kurgan1The big thing I'm wondering is will those extra 2 cores being enabled kill the OC that the 7750 can dish out?

Forgive my noobishness but how much does the best OC'd 7750 get in 3dmark compared to this 4 core 7750 at 3 ghz that scores 4288

#68

bnborg

You guys are right too.

I have trouble understanding modern marketing strategies.

#69

1Kurgan1

The Knife in your Back

z1tuForgive my noobishness but how much does the best OC'd 7750 get in 3dmark compared to this 4 core 7750 at 3 ghz that scores 4288

Won't even be close, 3dmark06 is VERY CPU intensive. Here's an example for you, my PII 720 BE @ 3.7Ghz is 100pts less than that 7750 x4 that is clocked 700mhz less than my proc.

I would go run 3dmark06 on my gf's comp and see, but I'm lazy :p I just promise you that it will be a ton less. Now remember not all programs use 4 cores, I don't think any games really do yet. And even with close 3dmark06 score, don't think for a second this PII wouldn't rip the 7750 x4 apart at just about anything it does (that doesn't use 4 cores).

bnborgYou guys are right too.

I have trouble understanding modern marketing strategies.

Have you read the whole thread?

#70

z1tu

Yes it's true that synthetic tests aren't that relevant for average users but I'd still like to see some game benchies :D ... I'm just excited I guess :P

#71

Lo0odak

I turned AAC in bios,and failed unlocking...:banghead:

#72

ShadowFold

You need to live in Asia for this to work apparently.

#73

z1tu

Ah don't worry about it there's still some things we haven't found out...it might not be just about the ACC

#74

z1tu

ShadowFoldYou need to live in Asia for this to work apparently.

:roll:

#75

Lo0odak

Yea,i must live in zimbabwe :pimp:

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Athlon X2 7750 BE Unlocked to Quad-Core

109 Comments on Athlon X2 7750 BE Unlocked to Quad-Core

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