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Using two different CPU models in one computer


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#1 Kirbyofdeath

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Posted 02 March 2016 - 05:32 PM

Lets say I had a two-socket computer. Would it be ok to have two processors that are of the same line, but different model?

i.e. is it possible to have a Xeon X5470 in one slot and a Xeon X5460 in the other?



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#2 the_patriot11

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Posted 02 March 2016 - 07:08 PM

in certain circumstances you can, there are certain things that have to match up, but keep in mind even if the two CPUs are compatible, they will only run at the speed of the slowest CPU.

 

To work together, all CPUs must have the same QPI and Ram speed, they must have the same thermal profile (TDP), they must have the same number of physical and logical cores to work together. Stepping and clock speed do not matter, but they will only run at the speed of the slowest CPU.

 

This is a list of current processors that can be mixed and matched:

1. Xeon E5502- can only work with another E5502 since it's the only dual-core Xeon 5500 (#4.)
2. Xeon E5504 can work with the E5506, both CPUs run at 2.00 GHz.
3. Xeon E5520 can work with the E5530 or E5540, both CPUs run at 2.26 GHz in either case.
4. Xeon E5530 can work with the E5520 (CPUs run at 2.26 GHz) or E5540 (CPUs run at 2.40 GHz)
5. Xeon X5550 can work with the X5560 or X5570, both CPUs run at 2.67 GHz in either case.
6. Xeon X5560 can work with the X5550 (CPUs run at 2.67 GHz) or X5570 (CPUs run at 2.80 GHz)
7. Xeon W5580 can work with the W5590, both CPUs run at 3.20 GHz)
8. Xeon L5506- can only work with other L5506s since it's the only L-series Xeon 5500 without HyperThreading.
9. Xeon L5518 can work with the L5520 or L5530, both CPUs run at 2.13 GHz in either case.
10. Xeon L5520 can work with the L5518 (CPUs run at 2.13 GHz) or L5530 (CPUs run at 2.26 GHz.)
11. Xeon L5508- can only work with other L5508s since it's the only 38-watt TDP Xeon 5500.

 

I would think, looking at those two CPUs, that they should work together, but I would consult the motherboard manufacturer or email intel to double check compatibilty before trying it.


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#3 Kirbyofdeath

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Posted 03 March 2016 - 10:58 AM

So if I wanted maximum performance, should I get a Xeon X5470 from one place and get another X5470 from another place? Or should I get a matched pair?


Edited by Kirbyofdeath, 03 March 2016 - 10:58 AM.


#4 Captain_Chicken

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Posted 08 March 2016 - 05:28 PM

So if I wanted maximum performance, should I get a Xeon X5470 from one place and get another X5470 from another place? Or should I get a matched pair?


Maybe I'm confused by this but do you mean xeons from different vendors? It shouldn't make a difference.

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#5 the_patriot11

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Posted 08 March 2016 - 07:48 PM

as long as theyre the same or compatible models it should not matter where you buy them from. 


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Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.





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