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Haswell Xeon Hyperthreading

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I always thought HT was fused off in i5s (or E3-122x v3s, in this case). If it's turned off in microcode, it seems like exploits that enable HT would be everywhere by now.
 
So, everyone, quick: download BIOS version 0215 x64 Build Date 4/29/13, just in case 🙂

Hmm... checking Asus' website reveals that perhaps this version is already unavailable. It shows version 0215 with a June date, but perhaps that's the date posted to web, not the build date. I wonder.
 
Benchmark it.. it's gotta run like an E3-1230 if it's truly hyperthreaded..

OC it and bench again 😀
 
You guys are baiting me into spending my time playing around instead of getting my work done! 😛

I'll try to run some benchmarks later on :twisted:
 
Ark says no, "Platform Brief" says yes. That's a pretty tempting deal for essentially a Haswell i7, if the OP's CPU is not an outlier.

The E3-1225v2 did NOT have HT.
 
Very interesting, thanks for the link! So perhaps specifying SR14U would give one a better chance, but those in the know are probably already snapping them up!
 
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Smoblikat said:
HT isnt physically shut off, it is just turned off by greed and microcode.

I know a guy who used to write BIOS/microcode for CPU's and he knows how to turn it on 😀
Click to expand...

Funny how documents are against you.

This is not in microcode, not in BIOS. Its was simply a batch shipped with HT physically enabled and a new version will be released with it shut off. And old versions will keep HT on ofcourse.

SR14U for HT.
SR1KX for no HT.
 
ShintaiDK said:
Funny how documents are against you.

This is not in microcode, not in BIOS. Its was simply a batch shipped with HT physically enabled and a new version will be released with it shut off. And old versions will keep HT on ofcourse.

SR14U for HT.
SR1KX for no HT.
Click to expand...

Well yea, pretty easy to figure out after reading the above document and reading the Japanese thread, lol! :biggrin:
 
Nice work everyone. I'm willing to give up the batch number or whatever other number would help if anyone's interested. Machine and packaging are at work, so I won't have access to the info until Monday.
 
According to the PCN, there are different SKUs for the retail chips.

No reason to gamble, if you want one buy from a vendor that lists specific Sspecs or SKUs
 
slim pickens said:
Nice work everyone. I'm willing to give up the batch number or whatever other number would help if anyone's interested. Machine and packaging are at work, so I won't have access to the info until Monday.
Click to expand...

The S-Spec number is on every single CPU package. So knowing SR14U and SR1KX is enough.
 
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