Difference in Phenom ii x4 chips

Blueprint

Junior Member
Jun 8, 2010
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Does anyone have experience with the 125 watt vs 140 watt AMD phenom ii x4 965? I haven't been able to find reliable info regarding the pros/cons of one vs. the other.

I edited the title for you so everyone would not be confused. I saw your last edit reason.
Markfw900
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alyarb

Platinum Member
Jan 25, 2009
2,444
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76
They are the same, but the 125 W model is newer and more power efficient.
 

Pederv

Golden Member
May 13, 2000
1,903
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140W = C2
125W = C3

Look for comparisons between C2 stepping and C3 stepping.
 

LoneNinja

Senior member
Jan 5, 2009
825
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C3 was designed to lower voltage/power consumption compared to C2. It also features a slightly improved memory controller. Performance wise they're the same processor, but when priced the same there is no reason to get a C2. The C3 also overclocks slightly better because of the lower voltage requirements.
 

Blueprint

Junior Member
Jun 8, 2010
20
0
0
In that same regard, if I were instead considering the Phenom II X6 1055t 125w because of multithreaded applications, would it worth waiting for the 95 watt version that is supposedly coming out soon? I read on some PC website that the 95w 1055t was due out in May 2010, but haven't been able to find anybody carrying it, although the 1035t (also 95w) appears to be popping up in some other prebuilt computers.

Anybody else heard anything of their whereabouts and superior performance? I do plan on OC'ing so that would be part of my consideration as well.
 

lopri

Elite Member
Jul 27, 2002
13,211
597
126
C2 revision has a frequency ceiling in 64-bit Windows, namely 4.0 GHz. And it also comsumes slightly more power than C3 revision.

C3 revision fixed the frequency issue and from what I've seen 4.0 GHz+ under 64-bit environment is very doable (depending on each chip, of course). AMD also implemented hardware C1E to overcome the mobo manufacturers not coping with C'nQ correctly in BIOS.

So yeah everything else being equal C3 revision chips are definitely more desirable than C2 revision chips.
 

hans007

Lifer
Feb 1, 2000
20,212
17
81
In that same regard, if I were instead considering the Phenom II X6 1055t 125w because of multithreaded applications, would it worth waiting for the 95 watt version that is supposedly coming out soon? I read on some PC website that the 95w 1055t was due out in May 2010, but haven't been able to find anybody carrying it, although the 1035t (also 95w) appears to be popping up in some other prebuilt computers.

Anybody else heard anything of their whereabouts and superior performance? I do plan on OC'ing so that would be part of my consideration as well.

the 95W ones will probably just be specially binned cpus and oem only.

probably so that the big box makers like HP / dell can get away with using motherboards that only have 95W vrms for a single line. instead of having to buy a 125W vrm board for an entire lineup just for 1 cpu.
 

DrMrLordX

Lifer
Apr 27, 2000
21,813
11,167
136
In that same regard, if I were instead considering the Phenom II X6 1055t 125w because of multithreaded applications, would it worth waiting for the 95 watt version that is supposedly coming out soon? I read on some PC website that the 95w 1055t was due out in May 2010, but haven't been able to find anybody carrying it, although the 1035t (also 95w) appears to be popping up in some other prebuilt computers.

Anybody else heard anything of their whereabouts and superior performance? I do plan on OC'ing so that would be part of my consideration as well.

One thing to consider . . . all x6 processors (Thuban) and all x4 processors with a T designation (Zosma) are E0 stepping CPUs. Disregard any talk of C2 and C3 stepping chips, since E0 is newer and better still.

Until someone has gotten their hands on a 95W 1055T, we won't know why it has a lower TDP, but it may just be due to binning as hans007 indicated. I haven't heard word of a new stepping in the works.
 

maniac5999

Senior member
Dec 30, 2009
498
2
81
One thing to consider . . . all x6 processors (Thuban) and all x4 processors with a T designation (Zosma) are E0 stepping CPUs. Disregard any talk of C2 and C3 stepping chips, since E0 is newer and better still.

Until someone has gotten their hands on a 95W 1055T, we won't know why it has a lower TDP, but it may just be due to binning as hans007 indicated. I haven't heard word of a new stepping in the works.

Does anyone know if the E0 stepping is going to move to the native X4s anytime soon? does anyone know if an old board (I have a ASRock A780FullHD) that only lists BIOS support for the C2 stepping processors will run with a C3 or E0 stepping proc? I'd like to replace my Kuma 7750 at some point, but don't want to upgrade the rest of the system.
 

hans007

Lifer
Feb 1, 2000
20,212
17
81
One thing to consider . . . all x6 processors (Thuban) and all x4 processors with a T designation (Zosma) are E0 stepping CPUs. Disregard any talk of C2 and C3 stepping chips, since E0 is newer and better still.

Until someone has gotten their hands on a 95W 1055T, we won't know why it has a lower TDP, but it may just be due to binning as hans007 indicated. I haven't heard word of a new stepping in the works.

dell is starting to sell 1035T and 1055T in the xps 7100 line. i wouldn't be surprised if those were the 95W chips, as that line ends at the 1055t.

Probably saves them like $1 in motherboard costs from foxconn to only offer 95W max.
 

konakona

Diamond Member
May 6, 2004
6,285
1
0
One thing to consider . . . all x6 processors (Thuban) and all x4 processors with a T designation (Zosma) are E0 stepping CPUs. Disregard any talk of C2 and C3 stepping chips, since E0 is newer and better still.

Until someone has gotten their hands on a 95W 1055T, we won't know why it has a lower TDP, but it may just be due to binning as hans007 indicated. I haven't heard word of a new stepping in the works.

good point. what's the commonly expected range of OC for E0s? I get a feeling someone isn't going to like my wording and make fun of it but oh well My c2 965 only does 3.8/2.8, but that will do for now..
 

DrMrLordX

Lifer
Apr 27, 2000
21,813
11,167
136
Does anyone know if the E0 stepping is going to move to the native X4s anytime soon? does anyone know if an old board (I have a ASRock A780FullHD) that only lists BIOS support for the C2 stepping processors will run with a C3 or E0 stepping proc? I'd like to replace my Kuma 7750 at some point, but don't want to upgrade the rest of the system.

If the motherboard manufacturer does not specifically support one or more am3 processors, then I wouldn't count on them working. Also, I haven't heard anything about native E0-stepping x4s. Yet.

dell is starting to sell 1035T and 1055T in the xps 7100 line. i wouldn't be surprised if those were the 95W chips, as that line ends at the 1055t.

Probably saves them like $1 in motherboard costs from foxconn to only offer 95W max.

Lower tdp ratings probably allow the OEMs to use smaller HSFs as well. The drop in TDP specification probably lets them use the crappy aluminum block hsf instead of the heatpipe hsf they use on 125W and 140W procs.

good point. what's the commonly expected range of OC for E0s? I get a feeling someone isn't going to like my wording and make fun of it but oh well My c2 965 only does 3.8/2.8, but that will do for now..

Thuban is still pretty new, so the jury's still out on what one should expect from E0 chips.
 

DrMrLordX

Lifer
Apr 27, 2000
21,813
11,167
136
The C3 chips will probably not work. I'm sure some Zoners could clarify as to why this might be, but there was a problem with some C3 955s and 965s not working on boards that had supported the same chips with C2 steppings. As I recall, the reason for this was fairly arbitrary.
 

veri745

Golden Member
Oct 11, 2007
1,163
4
81
The C3 chips will probably not work. I'm sure some Zoners could clarify as to why this might be, but there was a problem with some C3 955s and 965s not working on boards that had supported the same chips with C2 steppings. As I recall, the reason for this was fairly arbitrary.

It's also possible that they would work, but be unrecognized by the BIOS. You'd get an "unknown CPU detected" in CPU-z, but it would work just fine.

It's also possible that you'd get an "unknown CPU" that would be locked at 800MHz. My PhII 965 only ran at 800MHz when I installed in on my older 790FX mobo and forgot to update the BIOS first.
 
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