How Does the New 4000+ Stack Up?

Today AMD is also introducing a new X2, the Athlon 64 X2 4000+. Running at 2.0GHz but equipped with a 1MB L2 cache, the X2 4000+ fits nicely in between the X2 3800+ and the X2 4200+. Its pricing is also in between the two chips, coming in at $25 more than a X2 3800+ and $37 less than the X2 4200+.

The closest competition from Intel, after its recent price cuts, is the Pentium D 950. Clocked at 3.4GHz and armed with a 2MB L2 cache per core, the Pentium D 950 is priced at $316 in 1,000 unit quantities putting it in between the X2 4000+'s $328 and the X2 3800+'s $303 price tag.

3D Rendering - Cinebench 9.5

Our first benchmark is a 3D rendering test using Cinebench 9.5. We focused on the multi-threaded CPU rendering scores since we're primarily testing dual-core CPUs here. The benchmark reports performance in its own Cinebench units, but the important thing is that higher numbers mean better performance.

3D Rendering Performance - Cinebench 9.5

Cinebench 9.5 shows absolutely no performance difference between the 3800+ and the 4000+, indicating that the 512KB of L2 cache per core is sufficient for the dataset used in this test (alternatively it could be that even a 1MB L2 cache isn't big enough to hold the working dataset). The end result is that since the 3800+ and the 4000+ feature the same clock speed, in situations where a larger L2 cache isn't helpful we'll see absolutely no performance difference between the two processors. Combine this with the possibility that 512KB parts perform better on AM2 than they did on 939 and we start off seeing very little need to recommend the 4000+ over the cheaper 3800+.

3D Rendering - 3dsmax 7

Our next 3D rendering test has been around for a while on AnandTech, it's the 3dsmax 7 SPECapc test that we've used in past CPU reviews. The results we're reporting here are the SPECapc composite scores which are a geometric mean of four rendering tests and scaled against a set of reference scores that are included with the SPECapc benchmark package.

3dsmax 7 - SPECapc Benchmark

Once again we see basically no performance difference between the 3800+ and the 4000+, proving that clock speed is all that matters here with the Athlon 64 X2. Unlike the Cinebench test however, the Pentium D 950 is able to take the performance lead. Intel's Pentium D architecture continues to be quite competitive in 3D rendering and media encoding tasks as we're about to see.

Video Encoding - DivX 6.1.1 Pro

Next up to bat is DivX 6.1.1 Pro, once again a benchmark used in previous CPU reviews. Our testing methodologies haven't changed, so let's take a look at the results.

DivX 6.1.1 Pro with Xmpeg 5.0.3

DivX performance is extremely strong with the Athlon 64 X2 4000+ and 3800+, but once again we see absolutely no performance difference between the two CPUs. Both AMD offerings are able to significantly outperform the Pentium D 950.

Video Encoding - Windows Media Encoder 9

While H.264 is the way of the future for video encoding, the vast majority of content today is still encoded in MPEG-2, DivX or using Microsoft's Windows Media Encoder codecs. Just as in previous reviews we're using the Advanced Profile enabled by installing Media Player 10 alongside WME9 which allows for better video quality options and as a result ends up stressing dual-core CPUs even more.

Windows Media Encoder 9 - Advanced Profile

The Athlon 64 X2 4000+ manages to pull slightly ahead of the 3800+, but the two are basically tied. The Pentium D 950 is far more competitive in the WME9 test but isn't tangibly faster than the X2 4000+.

Video Encoding - Quicktime Pro 7.0.4 (H.264)

Until we get support for GPU accelerated H.264 encoding and/or faster CPUs, the number of H.264 encoding applications will remain quite limited. Apple's Quicktime Movie Trailers site has a great deal of H.264 encoded content and using Quicktime 7.0.4 you can generate the same quality, bitrate and file size of content. This is the same test we've run in the past, re-encoding the SD Quicktime movie trailer for Hoodwinked using the H.264 codec. All of the encoding settings were left at their defaults.

H.264 Encoding with Quicktime Pro 7.0.3

We continue to see a very small performance advantage for the Athlon 64 X2 4000+ but it's nothing worth writing home about, the X2 3800+ is just as good. The Pentium D 950 continues to be a close competitor but definitely isn't any faster than the two AMD solutions.

MP3 Encoding - iTunes 6.0.1.4

Almost a decade ago MP3 playback and encoding could bring even the fastest system to its knees, but today we can encode a 300MB wav into a 192 kbps MP3 in far less than a minute. We left all settings on their defaults except that we did not allow iTunes to play back the song while importing.

MP3 Encoding with iTunes 6.0.1.3

Given the nature of MP3 encoding it's not a surprise that there's no performance difference between the 4000+ and 3800+, but there's also no difference in performance between the AMD solutions and the Pentium D 950.

Gaming - Quake 4 1.1

With the later versions of Quake 4, id Software implemented multi-core support and we saw some pretty impressive performance gains on dual-core CPUs. As always we ran at the game's built in High Quality settings at a resolution of 1024 x 768; SMP was of course enabled.

Quake 4

Just as we saw performance differences between AM2 and 939 in games, we see a difference between the 4000+ and 3800+ in these very same games. The fact that the AM2 platform sees a performance gain in 3D games indicates that they are noticeably more memory bandwidth dependent than other applications, and thus we see a benefit to the 4000+'s larger L2 cache. The Pentium D 950 does surprisingly well here, especially considering Intel's very poor reputation for gaming performance.

Gaming - F.E.A.R.

With the graphics options set to F.E.A.R.'s default High Quality and the computer settings at Maximum, we ran the built in F.E.A.R. benchmark reporting average frame rate.

F.E.A.R.

The Athlon 64 X2 4000+ holds a 6% performance advantage over the 3800+ thanks to its larger L2 cache, which continues to make a reasonable difference in our gaming tests. The Pentium D 950 is nipping at the heels of the 3800+, but the 4000+ is untouched at the top here.

Gaming - Oblivion

Our final gaming benchmark uses Oblivion at the same quality settings we used in our recent Oblivion CPU comparison, the only difference is that we ran at 1024 x 768 to make this more of a CPU test and less of a GPU test. We used our Oblivion Town benchmark and reported the average frame rate obtained using FRAPS.

Oblivion

As we saw in our Oblivion CPU comparison, this game really favors AMD's K8 architecture for all of its strengths and severely penalizes the Pentium D for its NetBurst roots. The Athlon 64 X2 4000+ does continue to hold a performance advantage over the 3800+, but it isn't as large in Oblivion as we've seen in the previous two games.

So How Does the Athlon 64 X2 4000+ Stack Up?

At the end of the day the Athlon 64 X2 4000+ is still a very nice CPU that doesn't cost that much more than an X2 3800+; however, unless you're a gamer, you can probably get by pocketing the difference and sticking with the extremely competent 3800+. This is one of the unfortunate consequences of AMD's model number system, where a model number increase can be attributed to either a clock speed bump or an increase in cache size - the model number won't always convey true performance.

Surprisingly enough, the Pentium D 950 is extremely competitive here. Since it's built on Intel's new 65nm process the CPU is actually fairly cool compared to Pentium Ds of the past. Competition is good, but with sometimes significantly higher gaming performance, the Athlon 64 X2 still gets our recommendation here.

Does AM2 Reduce the Impact of L2 Cache Size? A New FX
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  • jmke - Wednesday, May 24, 2006 - link

    here ya go

    quote:

    Dual-Channel DDR2-800 on AMD Athlon 64 X2 "AM2" — the First Test Results of the New Integrated Memory Controller in RightMark Memory Analyzer


    http://www.digit-life.com/articles2/mainboard/ddr2...">http://www.digit-life.com/articles2/mainboard/ddr2...
    Reply
  • Xenoid - Tuesday, May 23, 2006 - link

    Ok so AM2 is AMD's offering for 2/4 06.

    The article title mentions same performance, faster memory, lower power. Wouldn't faster memory (in this case, ddr2) net a higher performance than what we're seeing here? Why is AMD bothering with DDR2 if it's not a significant improvement? If the power usage is so low, does this mean we can overclock a lot easier? I never understood the huge deal behind power usage on a cpu.
    Reply
  • coldpower27 - Wednesday, May 24, 2006 - link

    DDR production is slowing down, and DDR2 is continuing to mature, AMD does need to change to this memory type now, regardless if they like it or not.

    DDR2 also allows higher capacities, so you can probably reach 4x2Gb now as 2Gb modles are actually available on DDR2.

    Considering DDR2 biggest advanatge bandwidth, is what AMD doesn't really need more fo right now, performance improvements will be negligible.
    Reply
  • Furen - Wednesday, May 24, 2006 - link

    Also, having all that extra bandwidth available allows AMD to throw quad-core on the same socket without much problem (maybe 1H07... whatever everyone says I doubt AMD will let Intel have the quad-core advantage for a year, I'd say we'll see very low volume quad-cores as close to Intel's Kentsfield/Cloverton as humanly possible). I know we've heard that AM3 is coming next year (from, who else?, The Inquirer) but considering that the DDR3 spec is not finalized quite yet and just how slowly AMD jumped into the DDR2 bandwagon I'd say we won't see it until 2008 at the earliest. Reply
  • Axloth - Wednesday, May 24, 2006 - link

    I think there is also marketing side. There are lots of people "unaware" of ddr1-ddr2 comparison. And they probably think that ddr2 "must" be better than ddr1 because of that that "2". Like: ddr2 is upgrade or next generation of ddr1 so its gotta be much faster. Also, they might go for intel because intel uses ddr2 and amd only ddr1... And they think intel's better thanks to ddr2, disregarding cpu qualities of both amd and intel. Reply
  • pzkfwg - Tuesday, May 23, 2006 - link

    If DDR2-800 barely beats DDR-400, I was wondering if the AM2 socket could actually be slower than 939 DDR-400 when using DDR2-667 !?! Knowing that a very large amount of people would buy cheaper AM2 system with DDR2-667, that would be ridiculous! Reply
  • mino - Wednesday, May 24, 2006 - link

    YES and NO.

    Remember most people buy generic CL3 or CL2.5 DDR400. IMHO generic DDR2-666 should be ona par with that.
    Reply
  • soydios - Tuesday, May 23, 2006 - link

    So, the X2 4200+ will not run the memory at full speed. How safe would it be to overclock from 200x11=2200MHz DDR2-733 (2200/6=366x2=733) to 219x11=2200MHz DDR2-803 (2409/6=401.5x2=803) using OCZ DDR2-800 RAM and an Asus Xpress3200 motherboard? Reply
  • Furen - Wednesday, May 24, 2006 - link

    I'd say that you can very likely get away with that overclock with pretty much every 4200+ as long as the motherboard allows you to do it. Reply
  • mino - Wednesday, May 24, 2006 - link

    Safe as safe. At least from the point it won't blow up :)

    As for stability it all depends on the motherboard.
    Reply

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