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Topic Title: What's the difference?
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Created On: 05/12/2004 01:45 PM
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 05/12/2004 01:45 PM
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duckwaffle
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Joined: 12/26/2003

I was looking at Athlon 64 CPU's and motherboards because I'm looking to upgrade sometime (probably not soon). I noticed there were 2 different sockets for them, 754 and 940. What's the difference between the processors?

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 05/12/2004 01:59 PM
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Greyhound
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Socket 940 is only used by the Athlon 64 FX and Opteron-line, Socket 754 is for the plain Athlon 64.

Socket 940 processors have a 128-bit 'dual-channel' memory controller, whereas Socket 754 processors only have a 64-bit single-channel memory controller.
However, Socket 940 motherboards require registered memory which is a bit slower and more expensive than normal unbuffered(non-registered) memory.

The Athlon 64 FX is targeted at enthusiasts - it offers superior performance and easy overclockability(fully unlocked multipliers), but costs significantly more than a plain Athlon 64.
For most users, the 'normal' Athlon 64 offers more than enough performance...it also supports Cool 'n' Quiet' ">http://www.amd.com/us-en/asset...nstallation_Guide3.pdf, a power-saving feature which helps to reduce both noise and power-consumption

Eventually, both the Athlon 64 and Athlon 64 FX will be moved to the upcoming Socket 939 while the Opteron will remain on Socket 940.
ALL Socket 939 processors will have a dual-channel memory controller and can use unbuffered memory.

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 05/12/2004 02:03 PM
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duckwaffle
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I'll probably be waiting to see how 939 turns out then. Thanks

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New System:
Asus A7N8X-E Deluxe | NVIDIA® NFORCE2 Ultra 400 + MCP-T Chipset | AMD AthlonXP 3200+ 400mhz FSB Barton Core CPU (2.2 Ghz) | Kingston PC3200 DDR RAM 512MB x 2 | 80 GB Seagate HD | GeForce 4 Ti 4200 128MB
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