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Phenom II X2 555 BE vs Phenom II X4 920

post #1 of 33
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Guys I'm getting payed soon ,So I'm have a debate on what CPU upgrade should I get from my 9850 Black Edition. So I looked @ CompUSA's website to see what they have in there stores recently and I've narrowed it to 2 nice CPU's which have all I need and bang for my buck. I'm using a ASUS M4A785M Motherboard. Now if you look @ the similarities at the 2 processors, they have the same amount of cache (6MB L3). However the only difference is that the X4 920 doesn't have a unlocked multiplier, so Overclocking could be a little hard, but then again I'm ok with that. the 555 Black Edition has 2 locked cores which I can unlock with my motherboard, But I risk of having unstable cores and Overclock, So I pretty much don't feel like taking a huge risk and end up frying a CPU. Also, the X4 920 is clocked at 2.80Ghz and the X2 555 BE is clocked at 3.2Ghz. Basically, I could get something thats ready to use in a matter of minutes with a lower setting factor, or gamble it all on a newer but bit less advanced CPU that I have a risk of not running any unlocks stable as it should be. Also the X4 920 is a AM2+ and the 555BE is a AM3. And Guys, please don't mention about other products, because I don't have anything more than a 100 to spare.
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post #2 of 33
I had the same dilemma and I've chosen the x4 940BE as I got a good offer. I could have chosen the x2 555 or for 5€ more the x3 720, but I went with the 940. To answer some of your questions:
*AM3 vs AM2+ is irrelevant, you have a good AM2+ mobo and you'll probably going to keep it until you'll overhaul everything and pass to Bulldozer
*the 920 does have 4 working cores; when you'll have an SSD (and remove the main bottleneck of most computers) you'll feel more the added performance of the 4 cores
*the 565 could unlock to 3 or 4 cores; it may also OC with the 4 cores enabled. It also may not unlock and may not OC even if the cores can be enabled
*the 920 has locked multi, this may or may not be a huge issue depending on your board. Can it do HTT-overclocking or will it crack at 210? You should check forums to see what others managed to do with 920s, 905s or Athlon II X4 CPUs. Why only quads, because they are the most picky about mobo's VRM part and power delivery.
*the 920 is almost certainly an older revision like C2, while the 555 is a C3. Being a C3 the 555 would probably OC better, but of course it also depends of the state of the dormant cores. It's a fact though that you'll reach a higher clock speed with the 2 cores of the 555 than the 4 of the 920. Does this mean a dual @4 GHz is faster than a quad @3.4GHz? Probably not.

I probably gave you more questions than answers, but my point is that if you get a gem of a 555 it could be better. The 555 at 3.7GHz @Quad is probably possible. The 920 should reach 3.2GHz easily, so the question is would the extra 4-500MHz would be worth the risk.

cheers
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post #3 of 33
I would go with the 920, they're decent overclockers. I have my roomies 920 OC'd to 3.7Ghz 24/7. Should definitely hold you over til Bulldozer.
post #4 of 33
Buying used will bring many more options.
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post #5 of 33
Thread Starter 
Well I wont have to do a crazy overclock. Heck, I'll probably leave it near stock settings because I don't do heavy load of work or play heavy heavy games .
Edited by SayTR - 3/23/11 at 7:25am
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post #6 of 33
Either chip is a winner honestly on one hand with the 920 u get guaranteed quad core which will help you out with encoding and that sort of stuff that takes advantage of 4 cores. But with the 555 you are pretty much guaranteed beastly high overclocks which will help with welll, pretty much anything.

As with any unlocking situations, I always tell the person, if you want and need a quad don't gamble on it, get a quad, but if you want to have some fun get the 555, maybe you will get the surprise like i got, unlockable to a X4 and still reach 4.2ghz or as a dual core hit 4.5ghz on air.

It's up to you to make a decision on what you need your hardware to do, its like you want a bugatti veyron or a nissan gtr capable of 1000hp, the bugatti for sure gets to 1000hp but it will be more fun getting your "regular" GTR to 1000, and then bragging about it
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post #7 of 33
My freind got the x2 555BE and it did not unlock the other cores. I sent it back to newegg for him and got the 810.
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post #8 of 33
Thread Starter 
Quote:
Originally Posted by amd-dude View Post
Either chip is a winner honestly on one hand with the 920 u get guaranteed quad core which will help you out with encoding and that sort of stuff that takes advantage of 4 cores. But with the 555 you are pretty much guaranteed beastly high overclocks which will help with welll, pretty much anything.

As with any unlocking situations, I always tell the person, if you want and need a quad don't gamble on it, get a quad, but if you want to have some fun get the 555, maybe you will get the surprise like i got, unlockable to a X4 and still reach 4.2ghz or as a dual core hit 4.5ghz on air.

It's up to you to make a decision on what you need your hardware to do, its like you want a bugatti veyron or a nissan gtr capable of 1000hp, the bugatti for sure gets to 1000hp but it will be more fun getting your "regular" GTR to 1000, and then bragging about it
Exactly! Thats my point! If I get a X2 555 I wouldn't be needing to overclock because 3.2ghz has all I need , but I don't wanna gamble the risk and not get anything from the Phenom II X2. Also the Phenom II X2 has the new C3 CPU chip. And looking at the X4 920, It's the latest revision of the C2 CPU, but (like the Phenom II X2 555 BE) has a L3 Cache of 6MB, so both processors win there. By terms of overclocking, I wouldn't need to overclock the 555 BE because 3.2ghz is enoughly fine for any applications and gaming at this time, but of course I cannot guarantee any unlockable cores. As for the X4 920, there are 4 cores, however the multiplier is locked and there is nothing I can do about it! Maybe I could increase the FSB and Bus Speed and maybe we could get something productive out of there. If I were to get the X4 920, I would probably overclock it from 2.8ghz to 3.0ghz, but We will just have to see. Both CPU's will perform a very nice and agile upgrade to my system and to my aging 9850 Black Edition. Also, If I upgrade my CPU to a X4 920 and Overclock it, Do I have to overclock the whole system as well ? My friend said that I have to overclock the RAM and Video Card once I overclock the Bus Speed and/or FSB, but I doubt it.
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post #9 of 33
No you don't "have to". Once you increase the FSB the RAM speed goes up and so too does the HT-Link and Cpu-nb but you can easily decrease the speed by lowering the multipliers for each...the only one there that leads to instability is the HT-Link, keep that close to 2000mhz and you will be fine, RAM and CPU-NB...the higher the better
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post #10 of 33
Thread Starter 
Quote:
Originally Posted by amd-dude View Post
No you don't "have to". Once you increase the FSB the RAM speed goes up and so too does the HT-Link and Cpu-nb but you can easily decrease the speed by lowering the multipliers for each...the only one there that leads to instability is the HT-Link, keep that close to 2000mhz and you will be fine, RAM and CPU-NB...the higher the better
Yea but the X4 920 multipliers are Locked. I guess ill just have to raise the bus speed, or gamble it all on a Phenom X2 555BE
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