Personally if AMD states there is no L3 whatsoever on the 620 and 630 then I don't understand why some are able to unlock the L3. I will have to do more researching to find out whats true and whats not....
Overclkr and Xaira are right about the no L3 cache on the AMD X4 620 The chips don't have any L3 cache from the factory. What people are getting confused about is the first batch of chips released for sale included deneb chips with L3 6mb cache left on or disabled. I think now it would be pretty rare to find any of these deneb chips left. Some people believe games would suffer due to no L3 cache. Well check out the review at Http://www.overclockersclub.com/reviews/athlon2_620/8.h.... They show the X4 620 at 266 mhz and overclocked at 3.1. thats the first bar and last bar in the review. Now compare the last off green bar and the orange bar which is the I570. As you step though the tests. You'll find that the X4 260OC held its own in game benchmarks. The only tests were the numbers are lower were synthetic benchmarks and 3DMark06. Personally I think that alot of tests favor Intel and thats why AMD scores so low. If you already have DDR3 ram you can score a killer CPU and motherboard for around $200 Thats pretty much what I paid for my Q6600
CPU. I am seriously thinking about going back to AMD. I'm tired of Intel putting out all these new chips which require new motherboards to use them. Also some members using a motherboard with ACC in the bios report being able to turn on the L3 cache. If this is true its only because they got lucky and received one of the deneb chips with the L3 cache. You cannot turn an L3 cache if there is none. Comments are welcome.
Hi im new to this site, i have the same motherboard as you, and same athlon ii x4 620 cpu, can overclock this cpu to 2.8ghz on the m2n68 am plus board, but no l3 cache?? slows this cpu down!!!!!!!
As stated earlier in this thread, I don't believe your particular board can unlock.
I think Nvidia calls it NVCC or as ASRock calls it UCC is needed to unlock.
I see this is an older tread but I'll throw this out there any ways because 620's are still being sold..
If you have thee opportunity to look at the top of your processor, you can tell by the stepping codes what core your cpu was made from and if there is even any hope of unlocking an L3. The 620's used stepping codes of: CACYC AC and CADAC AD (Source). The CACYC AC are deneb cores with an L3 be it functional or not. The CADAC AD is a Propus core with NO L3. You can see what cpu's where made from the CACYC AC's (Here) and what was made with the CADAC AD's (Here).
So if you know you have a Deneb core or not you will still need to roll the dice and enable ACC,NVCC,UCC or flip the switch to find any extras. Just know how to clear your cmos if something isn't functional!
sounds about right, i was looking at the 620 cpu the other day, i brought mine from pbtech, im in new zealand, iwould that this cpu wont have l3, i just go buy 1 insted, would you recomend intel or amd with l3 cache?