AMD Athlon 64 3800+ and FX-53: The First 939 CPUs
by Derek Wilson on June 1, 2004 12:30 AM EST- Posted in
- CPUs
Comparing Sockets: Gaming Performance
DX9 and Media Encoding benchmarks confirm 939 is the fastest CPU at 2.2GHz.
2-pass Media Encoding was about 6% faster on 939 than 754 at the same speed. Direct X 9 games were closer in performance among the 3processors, but still showed a consistent 754-940-939 pattern from slowest to fastest.
Quake 3 and other games based on the Quake Open GL engine are sensitive to memory bandwidth variations. So it was not a surprise to see Quake 3 increase in performance a bit over 6% from 754 to 939. Across all DX8 games 939 again came out as the top performer.
We did not expect large improvements in performance as Athlon 64 moved from 754 to 939. Since we have found the performance of the Dual-Channel Socket 940 and the Single-Channel 754 to be close when they ran the same speed with the same cache, it was already clear the Athlon 64 was not an architecture that was starved for memory bandwidth like the 'deep-pipes' Pentium 4 design. When P4 went dual-channel the performance improvement was dramatic. Athlon 64 shows more modest increases in performance, but that performance increase is still real and measurable. Dual-Channel 939 is the fastest Athlon 64 socket, followed closely by 940. It appears that the reduced latency of unbuffered memory actually does translate into slightly improved performance for 939. Socket 754 is slower than either of the DC solutions, but the difference between fastest and slowest among the 3 sockets is still relatively small.
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Pumpkinierre - Tuesday, June 1, 2004 - link
That earlier french review couldnt get 4 DS sticks to work at DDR400:http://www.x86-secret.com/articles/cpu/s939/s939-3...
Still, I'd sooner have the dual bank memory than the extra cache. But if it is $800 and $600 then the Skt754s become good buys.
intercollector - Tuesday, June 1, 2004 - link
#6 - With memory prices where they're at now, the more dimms the better.For example, if you were to be building a system right now, you'd be hard pressed to justify getting anything more than 1GB (2X512). This fills up 2 slots already, thus only allowing 1 free slot for upgrade in the future. If you were to upgrade with another 512 stick, you'd have 1.5GB, but all your spots filled. If you want this system to last a while, that might just not do.
I say that 3 is definately the minimum you'd ever want, and wanting 4 is definately not out of the question.
Jeff7181 - Tuesday, June 1, 2004 - link
#5 - Is running four unbuffered DIMMs really that necessary? I mean... I haven't ever had more than two DIMMs since my 486, which technically didn't have any DIMMs... but it had 4 one MB SIMMs.mechBgon - Tuesday, June 1, 2004 - link
One potential benefit to the Socket939 platform is that it should open the door to running four unbuffered DDR400 DIMMs.JGF - Tuesday, June 1, 2004 - link
Hmm, now Toms is reporting the $700US+ price of the 3800+ as well. This had better not be true. Roughly $50 seperating the FX line and the 'regular joe' A64 line?? Please AMD, tell me this isnt right...Jeff7181 - Tuesday, June 1, 2004 - link
Well well well... looks like socket 939 isn't really worth waiting for, especially if it's priced a lot higher than socket 754. Socket 754, here I come :)JGF - Tuesday, June 1, 2004 - link
Good read. Couple of disappointments (though not neccessarily wesley's fault):1. Pricing/availability - supplies of 939 parts are rumored to be VERY constrained and some quarters are even uttering the dreaded p-phrase (paper launch). Also early listings for the 3800+ are placing it at an astronomical $700US+ which is obviously bunk. SAtill we are without any official statement regarding price and availability.
2. No 3700+ scores or even a word with what is happening there. With the rumored constraints on 939 and the fact that PCI-E from VIA or nvidia wont be around until late summer, I'm actually seriously looking into a 3700+ 754 system. When will we get info?!?
dvinnen - Tuesday, June 1, 2004 - link
hmmm, 30 mins after the nda ended. Yall need to get on the ball.