A New FX

The next new CPU introduction that we're here to evaluate is the Athlon 64 FX-62, a 2.8GHz dual-core FX part that's debuting exclusively on the Socket-AM2 platform. Given AMD's policy of only having one active FX part at a time (prior violations of this rule aside), the FX-62 is the only FX on the AM2 platform. The FX-60 still reigns supreme on the Socket-939 platform, and since the two platforms perform the same we can pretty much compare the FX-60 to the FX-62 directly without worrying about any motherboard/memory/chipset differences skewing the comparison. Of course no very-high-end CPU comparison is complete without Intel's latest Extreme Edition processor, which in this case is the Pentium Extreme Edition 965 we reviewed back in March.

3D Rendering - Cinebench 9.5

3D Rendering Performance - Cinebench 9.5

The beauty of the FX series of AMD processors is that its cache size doesn't vary like the rest of the Athlon 64 line, so the FX-62 has an undeniable performance advantage thanks to its 2.8GHz clock speed. The clock speed advantage is able to give it a pretty decent performance boost over the FX-60 here, as well as over the Pentium EE 965.

3D Rendering - 3dsmax 7

3dsmax 7 - SPECapc Benchmark

While we see a performance increase over the FX-60 in 3dsmax 7, it isn't enough to catch up to the performance of the Pentium EE 965. At 3.73GHz, the 965 is an extremely formidable competitor and very high performance CPU for 3dsmax rendering tasks.

Video Encoding - DivX 6.1.1 Pro

DivX 6.1.1 Pro with Xmpeg 5.0.3

Intel gets the slight nod in DivX encoding performance, with the FX-62 falling smack in the middle of the chart here between the 965 and the FX-60.

Video Encoding - Windows Media Encoder 9

Windows Media Encoder 9 - Advanced Profile

The situation doesn't really change with WME9; the FX-62 manages to come very close to the Extreme Edition 965's performance but falls a little short. The improvement over the FX-60 is quite noticeable here.

Video Encoding - Quicktime 7.0.4 (H.264)

H.264 Encoding with Quicktime Pro 7.0.3

Apple's Quicktime for Windows has never run well on Intel processors, and the FX-62 takes good advantage of that fact by putting the Extreme Edition 965 to shame in our H.264 encoding test. After looking at the 4000+ vs. 3800+ comparison on the previous page, it's nice to see a real tangible performance difference between two AMD CPUs.

MP3 Encoding - iTunes

MP3 Encoding with iTunes

While all three CPUs are very competitive in their MP3 encoding performance the Athlon 64 FX-62 is the clear winner here, finishing the encoding task 16% faster than the Pentium EE 965.

Gaming - Quake 4

Quake 4

At higher clock speeds the Athlon 64 FX-62 really separates itself from the Pentium EE 965, offering a very significant 21% performance advantage in Quake 4.

Gaming - F.E.A.R.


The AMD gaming advantage continues in F.E.A.R., this time the FX-62 holds on to a solid 18% lead.

Gaming - Oblivion


The Pentium Extreme Edition 965 is utterly disappointing in Oblivion, as the FX-62 outperforms it by an incredible 38%. With a very CPU and GPU dependent game like Oblivion, you can't ignore these types of performance differences, especially if you plan on feeding a pair of high end GPUs in SLI or CrossFire.

Athlon 64 FX-62 Conclusion

The Athlon 64 FX-62 verdict is a lot easier than with the 4000+ since the performance advantage is clear thanks to a 1MB L2 cache per core and an increase in clock speed. We would still recommend the FX-62 over the Extreme Edition 965 for gamers, but as we've seen in the past there are some situations where being able to execute four simultaneous threads, as you can with the EE, has its benefits.

Given the incredible price premium you pay for the FX-62, we would still strongly recommend going with a lower clocked Athlon 64 X2 instead. You can always overclock to get close to FX-62 performance or, alternatively, you could stay at the lower clock speed and enjoy lower thermal output.

How Does the New 4000+ Stack Up? Athlon 64 X2 5000+: A Cheap FX or Overpriced 4800+?


View All Comments

  • mino - Tuesday, May 23, 2006 - link

    2 options:
    1) Quad-core K8 (on 65nm)
    2) High-speed 65nm DC's(improbable)

    BTW what I understand FX-64 is on the way in a few months(july-august). Seems rev. F cores could handle 3.0, just 125W TDP may be the issue.
  • peternelson - Tuesday, May 23, 2006 - link

    Well, I don't think it's a QUAD CORE K8 (aka "Deerhound") because that is not due until late 2007.

    And dualcore K8L is not until 1H/2007.

    We need to choose something happening THIS year.
  • mino - Wednesday, May 24, 2006 - link

    Actually AMD can made Quad-core CPU's even on 90nm if they need to. The core will be huge, yields poor but IMHO 2.2G Quad at 90nm is possible within 125W TDP.

    Also AFAIK AMD has delayed 65nm at least for a quarter intentionally since what they need now is capacity on 90nm. They could not afford any (even short-term) production reduction at this moment. Provided in 3Q/06 FAB 36 is up and running at 10k starts the could afford to dedicate some of them for some high-end opterons and FX's.
  • Furen - Wednesday, May 24, 2006 - link


    Look at that and tell me how you can possibly fit twice that (90nm dual-core) in one package. Dual-core CPUs are huge to begin with, doubling the number of cores would probably require a pretty big drop in L2 sizes (think 256KB per core...). AMD still is production limited and designing a quad-core chip without going to 65nm would pretty much doom it to being a VERY low-volume part. Heck, Intel's Conroe is huge as well, it's just on a smaller process (the 160sq. mm die size would correspond to something like 300+sq. mm on the 90nm process).
  • jones377 - Tuesday, May 23, 2006 - link

    It's called Socket F Reply
  • Griswold - Tuesday, May 23, 2006 - link

    I dont think so. Socket F isnt really a "secret" nor a stopgap solution. Reply
  • peternelson - Tuesday, May 23, 2006 - link

    I think we hear more about socket F in June and it launches July.

    But that's not what this is alluding to.

    There was an announcement of a roadmap change from Q1/2007 to DECEMBER 2006.

    If I remember right it was two AM2 processors on 65 nanometre process.
  • jones377 - Tuesday, May 23, 2006 - link

    Perhaps not, but it's coming out at around that timeframe. Anything else and we would have gotten wind of it long ago. Reply
  • mlittl3 - Tuesday, May 23, 2006 - link

    A couple of things before I give my guess about the stopgap solution...

    1) K8L as state above WILL HAVE microarchitectural improvements. This has been all over the internet.

    2) AMD's processor pricing page states that the X2 5000+ and FX-62 will be available for both 939 and AM2. I don't know if they messed up but if not, it looks like 939 users can upgrade yet again.

    Okay, here's my guess for the stopgap solution...drum roll...L3 cache. I think AMD will release a 2.8 revised FX-62 with L3 cache or an ahead of schedule 3.0 GHz FX-64 with L3 cache. Just my guess.
  • AllYourBaseAreBelong2Us - Tuesday, May 23, 2006 - link

    The stopgap solution is the 65nm process that will allow AMD to ramp up the speed a bit more and get better TDP ratings.

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