Saturday, April 25th 2009
Athlon X2 7750 BE Unlocked to Quad-Core
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
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.
109 Comments on Athlon X2 7750 BE Unlocked to Quad-Core
And an ASRock made most of best balanced mobo for new Phenom II. Even ASUS do not made it so weel (except the high-end mobo's)
I mean, really... is it that hard just to say, hey we got an excess of good quad cores and we really cant harvest anymore dualies... maybe we should just sell a cheaper quad? AMD is losing money on selling healthy quads as harvested chips.
Not to mention the old x2's dont stand a chance against Intel Duals, and this gives them something to compete in that range.The Biostar 790GX/SB750, it clocks really well. Need a new cooler though, stock cooler only gets me so far even with extra 120's blowing on it, it just heat soaks after a bit. I can't go over 1.3v, so kinda stuck at 3.3ghz at with 1.296v.
wonder if it would work with my Biostar board... maybe i should try the new BIOS and the old one (if the new one doesn't work) when/if i get my 7750
the Conroe was a 4MB L2 CPU, the 6300/6400 were 2MB L2, they could of been either Conroe or Allendale, Allendale parts were actually formed for the 2MB L2 where Conroe was a Disabled L2- meaning either the L2 is damaged or its good just disabled to sell for the lower market.
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.
"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 :)