AMD Athlon II X4 620 & 630: The First $99 Quad Core CPU
by Anand Lal Shimpi on September 16, 2009 12:00 AM EST- Posted in
- CPUs
Power Consumption
Without power gating the Athlon II X4 draws as little power as possible, noticeably less than any of AMD's other multi-core CPUs. Our X4 620 sample was a bit more power hungry than our 630.
Even under load the power consumption story is a good one. Given the position of our Q8400 sample here we'd say that the Q8200 would probably use a bit less power, but the price differential should more than make up for it.
Overclocking
As I mentioned at the start of this article I managed to hit 3.25GHz on the Athlon II X4 620 without any additional voltage using the retail AMD cooler:
I could hit 260MHz x 13.0 for 3.38GHz by upping the voltage, but the gain wasn't worth the additional power usage. Anything higher wasn't possible without more exotic cooling or much more voltage. The performance improved handily at 3.25GHz:
| Processor | Adobe Photoshop CS4 | x264 2nd pass | Left 4 Dead |
| AMD Athlon II X4 620 (2.6GHz) | 27.5 seconds | 15.4 fps | 93.2 fps |
| AMD Athlon II X4 620 @ 3.25GHz | 23.2 seconds | 18.9 fps | 102.9 fps |
| AMD Phenom II X4 955 (3.2GHz) | 22.3 seconds | 19.1 fps | 121.4 fps |
| Intel Core 2 Quad Q8400 | 21.8 seconds | 17.9 fps | 105.6 fps |
At 3.25GHz the Athlon II X4 ends up faster than the even more expensive Q8400in some cases, and gets much closer in others. In applications where the large L3 cache isn't missed, the overclocked Athlon II can end up being a poor man's Phenom II X4 955. But looking at the Left 4 Dead performance, there's no such thing as a free lunch - the overclocked Athlon II isn't quite that good.
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the zorro - Thursday, September 17, 2009 - link
the turbo overclocking is plain overclocking of all lynnfield cores at least 600 mhz and you are comparing lynfield overcloded results versus phenom 2 955 stock speeds.phenom 2 is much better than lynnfied 750 and when overclocked to 4ghz remains at 55 C while lynnfield temps are almost 100C. which sucks.
all the 'advantage' of lynnfied in these results comes from benchmarking an overclocked processor and present it as if it were stock speed, which is illegal
silverblue - Thursday, September 17, 2009 - link
Wrong. I'll help you here...i5 750
Default: 2.66GHz
4 cores: 2.93GHz 3 cores: 2.93GHz 2 cores: 3.06GHz 1 core: 3.20GHz (gains: 266MHz/266MHz/400MHz/533MHz)
i7 860
Default: 2.80GHz
4 cores: 3.06GHz 3 cores: 3.06GHz 2 cores: 3.33GHz 1 core: 3.46GHz (gains: 266MHz/266MHz/533MHz/667MHz)
(all data reassembled from the second table at http://www.anandtech.com/cpuchipsets/showdoc.aspx?...">http://www.anandtech.com/cpuchipsets/showdoc.aspx?...
The turbo mode gives a minimum boost of 266MHz and a maximum of either 533MHz for the i5 or 667MHz for the i7. NOT 600MHz for all cores. Quite where you got that from is beyond me. Additionally, Turbo is a 100% legitimate technology. Would you be happier if the default clock was throttled?
As for illegal... we have a word in the UK for this sort of comments, and it's "bollocks".
Eeqmcsq - Thursday, September 17, 2009 - link
Good chart, though you linked to the wrong page. It was on the Turbo Mode page. I have no idea how I missed that chart the first time I read the article.But for the i5 750, if the lowest GHz Turbo mode will operate at is 2.93 GHz, why doesn't Intel just call it an i5 750 at 2.93 GHz, instead of 2.66 GHz?
silverblue - Thursday, September 17, 2009 - link
My bad - the link has a ) after it which sends you to the intro page. I should've put a space after the link.At least you checked through to find it... I doubt "the zorro" has bothered as of yet.
You make a very good point about Turbo but it's not as if Intel is pretending it doesn't exist or it's disabled; it should be relatively easy for people to make comparisons using the benchmarks in this article as well as others. I suppose it may have helped if there was data suggesting the clock speed at the time of a specific test, but I can't imagine that'd be a very easy thing to do especially if threads are being bounced across cores and as a result, the clock speed is constantly fluctuating. The alternative would've been to disable Turbo and that would've prevented people like "the zorro" from his pointless tirade on here, but they would've been disabling a feature of the processor to test it against rivals that lack that feature.
Eeqmcsq - Thursday, September 17, 2009 - link
> I suppose it may have helped if there was data suggesting the clock speed at the time of a specific test, but I can't imagine that'd be a very easy thing to do especially if threads are being bounced across cores and as a result, the clock speed is constantly fluctuating.- No, but the troll does make one point that I agree with. When an i5 is run with Turbo mode, Anand's charts should NOT list that it is at 2.66 GHz. He should list it as 2.93-3.20 GHz, especially if it is 100% certain that Turbo mode NEVER reaches the baseline Turbo off clock of 2.66 GHz.
> The alternative would've been to disable Turbo and that would've prevented people like "the zorro" from his pointless tirade on here, but they would've been disabling a feature of the processor to test it against rivals that lack that feature.
- Well, I've asked for the same thing, but for different reasons that I don't want to repeat in this comment or I'll sound like a troll. :)
the zorro - Thursday, September 17, 2009 - link
if you are an accountant and do the same thing and try to present false results as real then you would go to jail.you can call a bank robbery an 'auto loan' but still is robbery and you still go to jail.
people is not stupid.
silverblue - Thursday, September 17, 2009 - link
AMD, please just incorporate a turbo mode into your next CPUs so we can get rid of trolls like this one. Do it for me.Please.
the zorro - Thursday, September 17, 2009 - link
no amd wont do that.why?
because a platform at stock speed is more stable than other that is auto overclocking, also intel created the turbo crap story to charge for the overclocking.
yes intel is charging their users for the overclocking,now overclocking is a feature and intel charges for it.
amd phenom 2 overclocking is free.
try to auto overclock a server, that is not good and creates instability in the platform.
silverblue - Thursday, September 17, 2009 - link
And if they do, oh what will you do then?Additionally, try to explain to me what the 965 BE is other than an overclocked variant of the 955, which in turn was an overclocked variant of the 945. Isn't it interesting how none of these overclocks better than the others, and why the 965 BE has a higher TDP than the 955?
You act as if AMD and Intel have never produced an overclocked variant of any of their CPUs until Nehalem turned up.
the zorro - Thursday, September 17, 2009 - link
i can see that you have no clue, when a new processor is introduced that is 200 mhz faster than another model, is not an overclocked processor, is a more refined silicon, with better electrical properties and more stable at highers speeds. and also with higher overclocking headroom.