(2) Xeon SL8MA 2.8 ghz dual core VS. (2) Xeon 3.8 ghz single core CPUs

ookami1 · Mar 17, 2015

I have both processors on hand, trying to figure out which would be best.
The PC is used for storage, light gaming, and some streaming services.

It has 2 of the Xeon 3.8 single cores installed
This is a old HP Workstation so it uses 2 physical CPUs.

Just wondering if the 2.8ghz dual core outbeats a 3.8 ghz single core

3.8 Name is HP Intel Xeon 3.8 GHz (PH202A)

kanewolf · Mar 17, 2015

Assuming the memory is divided uniformly between the two sockets, I don't believe a Ghz clock speed penalty could be overcome by optimizations on chip.

ookami1 · Mar 17, 2015

kanewolf :

Sorry kanewolf, i couldn't follow what you said.
Not the most educated when it comes to cpu specs

Edit: Not sure if it matters, computer has 8gb of ram

kanewolf · Mar 17, 2015

ookami1 :

Each of the two CPU sockets have memory slots that are associated with them. If you have two physical CPUs but all the DIMMs are in the slots connected to the first CPU, then the second CPU pays a big penalty when accessing ALL memory. If the DIMMs are distributed between the two CPU socket DIMM slots then each CPU pays a penalty for some memory accesses but not all.

Do you have eight 1GB DIMMs?

Saberus · Mar 17, 2015

Unless you're running enough applications at the same time to make use of the extra cores, I think you'll see better performance from the single core procs.

ookami1 · Mar 17, 2015

kanewolf :

ookami1 :

Each of the two CPU sockets have memory slots that are associated with them. If you have two physical CPUs but all the DIMMs are in the slots connected to the first CPU, then the second CPU pays a big penalty when accessing ALL memory. If the DIMMs are distributed between the two CPU socket DIMM slots then each CPU pays a penalty for some memory accesses but not all.

Do you have eight 1GB DIMMs?

I have (4) 2gb DIMMs. The board only has 4 slots opposed to the larger XW systems HP put out

kanewolf · Mar 17, 2015

ookami1 :

kanewolf :

I have (4) 2gb DIMMs. The board only has 4 slots opposed to the larger XW systems HP put out

OK, now I want to know -- which HP model it is.

ookami1 · Mar 17, 2015

kanewolf :

ookami1 :

OK, now I want to know -- which HP model it is.

xw6200 that was gifted to me a few years ago (Solid computer. just no idea what processor is best)

kanewolf · Mar 17, 2015

ookami1 :

kanewolf :

xw6200 that was gifted to me a few years ago (Solid computer. just no idea what processor is best)

some history for you from the HP Product Bulletin:
xw6200 retired from production Jan 2008.
Up to 8GB RAM (just 4 slots).
500W power supply
Available with 1.44MB Floppy
Top graphics card available Quadro FX3450 (256MB VRAM)

ookami1 · Mar 17, 2015

kanewolf :

ookami1 :

some history for you from the HP Product Bulletin:
xw6200 retired from production Jan 2008.
Up to 8GB RAM (just 4 slots).
500W power supply
Available with 1.44MB Floppy
Top graphics card available Quadro FX3450 (256MB VRAM)

Lol then it's come a long way. The front of the computer was heavily damaged, so I put it in a new case with better airflow (those xeons run hot!) I also upgraded graphics card, power supply when that broke, and updated it to the 8gb.

Oh and threw away the floppy

Now that we are off topic, which cpu did we end up on?

Saberus · Mar 17, 2015

Looks like that's from the era of shared memory through a chipset-based memory controller. I still say the single core procs unless you're whipping that old nag with a lot of applications.

ChipInNC · Mar 8, 2016

This is an older thread, but I'd like to hear what you ended up doing.

My suggestion would generally be to go with the SL8MA CPUs. The clock cycle is a little slower, but they have 4Mb of cache each. With today's multithreaded operating systems, I'd rather have 4 cores processing rather than just the 2.

I've made that decision on a number of servers I've had, never regretted it either.

Good Luck!

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