I may have been tricked by Fry's Electronics. Months back I purchased Phenom IIx4 955 Black. The box I purchased it in was correct. The CPU was stamped correctly when I installed it, but the Bios only showed 3 cores.
When I use Everest it states that I have "TripleCore AMD Phenom II x3 Black B55, and in the image I have here you see that under "multi-cpu" section it shows 3 cores and AMD Phenom IIx4 955 (the one I supposedly purchased.
CPU-Z give me the same information.
Windows 7x64bit OS states I have Phenom IIx4 955 when I check System Information.
AMD overdrive shows the pc as having the PhenomIIx4 955, but when I look at the details it shows 3 cores running (have image for that too).
I am completely baffled by this. The Bios thinks I have 3 cores. Is there some covert way to unlock the 4th core and then the CPU will show up correctly. I am sure someone here is a lot smarter than me and has experience with something similar to this.
Thank you in advance for taking the time to read this and moreover, if any suggestions at all can be offered, I sincerely thank you for that too.
(ticket submitted to AMD, no response yet)
EVEREST RESULT -- Notice the discrepancy between CPU properties vs. Multi-CPU ?????
More about :phenom iix4 955 showing phenomiix3 b55
Nope, correct section, just people are sometimes a little slow to respond, a lot of the members here are american so five hours+ behind uk
I'm stumped as to why this is, I'd also assume having bought an x4 955 that it had four usable cores, I'd speak t fry's and amd as you already are, can't advise anymore than that I'm afraid
Hm, I haven't heard of this one before. Anyone else, this seems a little odd? Does a chip stay locked/unlocked after you remove it? (questions to members, not OP)
I'd run a stress test (Prime95) on your CPU to make sure the 4th core is working properly, AMD could have messed up packaging/naming your CPU and locked the core to prepare it to be a Phenom II 3. BUT windows shows it as a 955, so *shrug
Glad your problem is solved (assuming it stays stable), enjoy!
Also, is your CPU still coming up as B55 in Everest/CPU-Z?
What about your bios have you checked to see if you have an option to enable/disable cores ?
You could try uninstalling the processors in device manager then reboot to see if it can find the other core. I could be you have a weak core & your chip is a borderline x3 but got to be a x4 because they are the same chip x3 555 & x4 955 with a core disabled so if you have no luck with suggestions, you should send that back as a mislabled part.
You could have disabled that core if you flashed the bios or if it has reset through some on-board bios recovery or other in which case your system would see it as a Phm II x 3 like the reverse of what would happen if you bought a Phenom II x 3 & paired it with a board that could unlock the 4th core, your system would then recognize it as a Phnm II x 4 955.
Glad that you've solved the problem. FWIW it's also possible to have fewer cores reported if the motherboard bios was flashed with an incorrect firmware update. My 955 x4 became an x2 until it was fixed with the correct update.