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- Re: Hp z4 G4 CPU upgrade

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06-24-2025 12:00 AM
Hello all ,
I’ve got a Desktop that is sat doing nothing cos it’s a bit old , my thoughts as I did manage to compete my last project of upgrading a couple in a z2 g9 mini
is to upgrade the you in this but I cannot for the love of me find any infor about comparability no doubt due to the age
current cpu is
intel Xeon w-2125
Anyone any ideas please let me know
much appreciated
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06-24-2025 07:50 AM - edited 06-24-2025 10:37 AM
Nothing that money can't fix. You sound like a guy who wants most bang for the buck. Your old W-2125 costs now $11.25 recycled on eBay. Attached below is the latest HP PDF QuickSpecs for the Z4 G4. The list just below shows your processor plus three newer generation current processors with name/ sSpec code/ price new now from Intel/ lowest price today recycled from eBay with shipping from US seller/ Max TDP wattage:
W-2125 SR3LM 444.00 11.25 120W (yours)
W-2235 SRGVA 610.00 55.00 130W (what I got for my Z4 G4)
W-2225 SRH03 488.00 59.90 105W
W-2245 SRH02 733.00 302.00 155W (step up in technology but over 140W max TDP, leap up in cost)
The older processors HP no longer shows in current QuickSpecs can still run in these... to use the newer generation ones you generally want to update BIOS to the latest version first.
Any processor with over 140W max TDP will trigger a demand from the motherboard to have the HP premium cooling heatsink/fan and special wiring adapter kit installed. That has been posted about here in the forum. You can roll your own for that if you go hot; mine runs 130W max so I did not need that kit but made one up anyway for best cooling. See p. 32 of the PDF below. The new generation processors can run faster memory (DDR4 2933) but if you currently have slower memory the newer processor will slow down to match that slower speed (= bad).
I'm happy with my choice of the W-2235 and am waiting for the still-too-expensive ones with Intel Turbo Boost Max technology to come down in price. Two added tips... run your boot/applications drive in the "primary" M.2 socket on the motherboard, and a PCIe Gen4 M.2 stick will run faster than a Gen3 M.2 stick even though the ZX G4 series of workstations only have Gen3 PCIe slots.
06-24-2025 07:50 AM - edited 06-24-2025 10:37 AM
Nothing that money can't fix. You sound like a guy who wants most bang for the buck. Your old W-2125 costs now $11.25 recycled on eBay. Attached below is the latest HP PDF QuickSpecs for the Z4 G4. The list just below shows your processor plus three newer generation current processors with name/ sSpec code/ price new now from Intel/ lowest price today recycled from eBay with shipping from US seller/ Max TDP wattage:
W-2125 SR3LM 444.00 11.25 120W (yours)
W-2235 SRGVA 610.00 55.00 130W (what I got for my Z4 G4)
W-2225 SRH03 488.00 59.90 105W
W-2245 SRH02 733.00 302.00 155W (step up in technology but over 140W max TDP, leap up in cost)
The older processors HP no longer shows in current QuickSpecs can still run in these... to use the newer generation ones you generally want to update BIOS to the latest version first.
Any processor with over 140W max TDP will trigger a demand from the motherboard to have the HP premium cooling heatsink/fan and special wiring adapter kit installed. That has been posted about here in the forum. You can roll your own for that if you go hot; mine runs 130W max so I did not need that kit but made one up anyway for best cooling. See p. 32 of the PDF below. The new generation processors can run faster memory (DDR4 2933) but if you currently have slower memory the newer processor will slow down to match that slower speed (= bad).
I'm happy with my choice of the W-2235 and am waiting for the still-too-expensive ones with Intel Turbo Boost Max technology to come down in price. Two added tips... run your boot/applications drive in the "primary" M.2 socket on the motherboard, and a PCIe Gen4 M.2 stick will run faster than a Gen3 M.2 stick even though the ZX G4 series of workstations only have Gen3 PCIe slots.
06-24-2025 05:37 PM
Exactly that , I’d rather upgrade it than sell it or bin it ,
im gonna go for what u suggested , I’ve ordered the w-2235 of eBay that is coming for Friday hopefully so I’ll give it a go ,
I’ve also got a gen 4 stick laying around so I’ll add it thanks for the tip , any other upgrades u know of ?
cheers for your help
06-24-2025 05:58 PM
Happy to help. I'll try to add in a pic of the memory I'm using tomorrow. Thunderbolt 3 card is a great add-on if you're into self-flagellation. I finally beat it out of me. If you want wireless I figured that out, but wires are pretty nice too.
I like the optional memory cooling "saddle" and front case fan so could help on that a bit too.