AMD Athlon 64 4000+ & FX-55: A Thorough Investigation

Justifying a Rating: Athlon 64 4000+ vs. Athlon 64 3800+

Given difficulty hitting 2.6GHz on the 130nm process, AMD rebadged the FX-53 as an Athlon 64 4000+, making the only difference between it and the 3800+ a matter of 512KB of L2 cache as they both run gait 2.4GHz. But this leaves us with a very important question, does the additional L2 cache actually justify an increase in model number? Remembering that the Athlon 64 has an on-die memory controller it's obvious that the CPU will benefit less from a larger cache than something like the Pentium 4, which does not have the benefit of always having extremely low latency memory accesses. It's even more important to look at this rating carefully since we have no comparison point from Intel as there will be no 4GHz Pentium 4. Armed with this question of justification, let's look at what our results have told us:

In Business/General Use tests, the Athlon 64 4000+ offered the exact same performance as the 3800+ in three tests, and outperformed its predecessor by an average of 3.8% in 7 tests. Given AMD's 5% increase in model number, we'd say that when it comes to Business/General Use performance, the processor has earned its keep.

In the Multitasking Content Creation tests, the 4000+ averaged a 4.5% advantage in two of the five tests, but offered no performance improvement in the remaining three. Here we have a more questionable use of the 4000+ rating.

In the Video Creation/Photo Editing tests, the 4000+ was actually faster in all of the tests, but only by an average of 0.8% - definitely not justifying the rating increase.

Looking at A/V Encoding, the 4000+ tied with the 3800+ in one test and outperformed its predecessor by 1.2% on average in the remaining 4 tests - here we have, once again, much more borderline use of the 4000+ rating.

As far as gaming performance goes, the Athlon 64 4000+ offers a performance improvement in 8 out of our 10 tests, averaging 3.1% faster than the 3800+. Considering we're talking about a rating increase of 5%, that's not too bad.

The Athlon 64 4000+ averaged 3.9% faster than the 3800+ in two out of the three 3dsmax rendering tests, somewhat justifying its rating considering that the one test it did not show an improvement in was a geometric mean of four individual render times.

Finally in our Workstation performance tests the Athlon 64 4000+ barely offers any improvement over the 3800+. In 8 out of the 9 tests the 4000+ averaged 0.6% faster than the 3800+, while offering no performance gain in the remaining test.

So what does the Athlon 64 4000+'s scorecard look like? Does it earn its rating?

Business/General Use - Yes
Multitasking Content Creation - Yes
Video Creation/Editing and Photoshop - No
Audio/Video Encoding - No
Gaming - Yes
3D Rendering with 3dsmax - Borderline
Workstation Performance - No

So despite the increase in model number, the Athlon 64 4000+ gives very little reason for rejoice other than for hopefully cheaper 3800+ prices.