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So who's going to try an X5698? 4.4GHz! ;)

(probably won't work)
First off does anyone know if a real life production x5698 exists?

I have an engineering sample. I tried it as recently as the mp51.0087 firmware when I was on High Sierra. Tested it in a 2010 and 2009 single cpu tray. Black screens in both if I remember correctly. Didn’t work.

I considered selling it but I was hopeful with all the microcode updates that were being done that this would be a update on the horizon so I hung onto the processor.

I haven’t tried it yet since upgrading to 140.0.0.0. I’ll give it another shot when I have some free time this weekend.
[doublepost=1544663857][/doublepost]I’ll give this guy (X5687) another shot as well when I get a chance but I suspect it will give the same results as user Slash-2cpu reported back in post #22 of this thread.

What he saw was exactly the same behavior I experienced with the x5687 when I last tested it on the high Sierra firmware. I’ll try it again in 140.0.0.0/Mojave even though it sounds like my configuration is similar to what Slash-2cpu tested in on.
[doublepost=1544664150][/doublepost]
Probably not... but if I had one I would.

There isn't a single one for sale on Ebay right now. Back when I bought my X5687, there were 2 X5698's for sale.
Where is the one for sale on eBay? Curious what they're asking. I did and the only computer related X5698 that comes up is for an HP StoreServ what X5698 in the description. I don't think the X5698 is with reference to the processor configuration though because it shows "w/ 24 x 5698-1288 900G 10K SAS".
 

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Where is the one for sale on eBay? Curious what they're asking. I did and the only computer related X5698 that comes up is for an HP StoreServ what X5698 in the description. I don't think the X5698 is with reference to the processor configuration though because it shows "w/ 24 x 5698-1288 900G 10K SAS".
There isn't a single X5698 for sale on Ebay as of right now. I saw 2 of them for sale back when I bought my X5687, but that was at the beginning of the year. Back then, if I remember correctly, they were asking somewhere north of $200.
 
I misread your message. You're right. I don't see any now and I haven't seen any for months. Do you know if production X5698 processors were ever sold? I've only come across engineering samples that claim to be X5698 processors.
 
I believe they all were all engineering samples. I don't think any were actually produced for consumer use, but I could be wrong.

If so, don't ANY engineering samples have a hit or miss record for working when installed in the cMP? That would mean pretty much any X5698 isn't going to work due to all of them being engineering samples.
 
X5698’s were shipped in HP blade servers. S-Spec number for production parts is SLC32. I give it a <1% chance of working in MP 4,1/5,1.
 
Damn. Should have read this. Anyway, I'm going to try it if only to confirm your result. I also bought a 5677 (after reading this) so my effort is not too wasted.
OK. Did the install and... X5687 does not boot. So, we can be sure about that. X5677 comes next.
 
As an update to anyone who finds this thread, the 140.0.0.0.0 BootROM that comes with MacOS 10.14.1 does the same thing with the X5687. Appears ok at first. Fans spin up normally and no error LED's, but then no boot chime and blank screen. Single-CPU Mac Pro 4,1 flashed to 5,1.

Same behavior on a genuine 5.1 running a tsialex corrected 140.
 
Same behavior on a genuine 5.1 running a tsialex corrected 140.
It's probably related to the higher multiplier needed for X5687 and X5698. Seems Mac Pro CPU initialisation code supports up to the 26 multiplier, the one needed for X5677 and X5690. To support X5687/X5698 we have to change that code.
 
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