SiS 755FX Chipset

The SiS 755 chipset was covered in detail in our review of the SiS 755 Reference board. The SiS 755 supported 800HT, Socket754, and single-channel memory. The 755FX takes the excellent features and performance of that chipset and updates it for Socket 939.

This means that the new 755FX supports 1000 HyperTransport speed, Socket 939, and dual-channel memory. Winfast combines the 755FX with the same 964 Southbridge used on the 755 Reference board. That means that this combination supports AGP8X, PCI, 4 IDE devices, and 2 native SATA ports.

Model Athlon 64FX
Athlon 64 (939)
Athlon 64FX
Athlon 64 (939)
Athlon 64 (754)
Pin Count 939 939 754
Memory Controller Dual Channel DDR Dual Channel DDR Single Channel DDR
Memory Type Unbuffered DDR400/333 Unbuffered DDR400/333 Unbuffered DDR400/333
HyperTransport 2000MT/s
Chipset SiS756/965 SiS755FX/964 SiS755/964
Graphic Interface PCI-EXP x16 AGP8X AGP8X

SiS has also announced a PCI Express chipset for Athlon 64, called the SiS 756. We have not seen a SiS 756 board yet, but the chipset specifications are basically the same as 755FX with support for PCI Express instead of AGP/PCI. The new 965 Southbridge announced with the 756 also supports 4 SATA 150 ports instead of the 2 SATA ports supported by 755/755FX.

Index Basic Features: Winfast 755FXK8AA
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  • nserra - Thursday, December 16, 2004 - link

    The sis chipsets are very good, with the right bios configuration and drivers will do well. At least my ME and XP installation is already 3 years old and didn’t have to reinstall them because of problems.

    The biggest Sis problem is that the mobo maker’s dont use good quality components on the (sis) boards, at the same level of the intel based ones. When every one says intel is the best, or that sis sucks, etc... Take that into account OK.

    I noted the Soltek comes on top too many times, I wonder why is that, especially over the other ones, maybe they are socket 754 based?

    #6 I had the same problem you have, and now it is solved. The startup time is really fast, not as fast as the ME, but good :)
  • jmke - Thursday, December 16, 2004 - link

    Why is DOOM3 (opengl) in the DX9 gaming category? ;)
  • Gnoad - Thursday, December 16, 2004 - link

    Any word on if it would be capable if running above 233 if a program like clockgen was used?
  • Calin - Thursday, December 16, 2004 - link

    I have bought a ECS K7S5A with SIS 735 chipset. It is still working, and is going good (except a very long startup time in WinXP).
    I won't stay away from SiS chipsets, especially at that price point for a mainboard
  • FFS - Thursday, December 16, 2004 - link

    missed t in "Switzerland" Sorry...
  • FFS - Thursday, December 16, 2004 - link

    Good article... hope to see more boards in retail...
    Competition is very good.
    SiS 755 was very good... in reviews...
    But we never could find any SiS mobo in the shops (at least in Swizerland)
    But I just do not trust SiS after I had way too many problems with SiS 648 (also was very good in reviews at it's time)

    But check this out:
    nSISt on nVIDIA

    I a not a fun of nVIDIA although nF3 Ultra looks very atractive to me (nF4 not, since I have already good 6800GT AGP board...)

    Well, too bad that Intel do not make chipsets for AMD... :)))
  • Poser - Thursday, December 16, 2004 - link

    In the article he wrote, "The board is also a 3-phase design, instead of the 2-phase that we often see on boards designed to a price point" which made me wonder -- what's the difference? Both in a technical sense, and in a performance sense. Does the number of phases a board uses have any influence on what's the best power supply to mate it with, or am I wandering off in the wrong direction entirely? Anyone have a good link where I could dig a bit deeper?
  • esun - Thursday, December 16, 2004 - link

    Wow, this board looks like an excellent value. Here's hoping that they'll fix those minor problems, and perhaps I'll pick one up myself.
  • Saist - Thursday, December 16, 2004 - link

    just wanted to comment that I picked up ECS's 755-A2 board some time back and it is now pretty much the value board that I pick when someone doesn't want to shell out $100+ for a mother board. I'm pretty much pleased to see that SiS is continuing this with the 755FX. Hopefully it will mean a Socket 939 A64 will be joining the 3 current 754 boards.

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