AMD Sempron: A Fresh Take on Budget Computing
by Derek Wilson on July 28, 2004 12:01 AM EST- Posted in
- CPUs
Two Flavors are Better than One: Socket 754
Next in line: the K8 version of Sempron. In these processors, we have a little more with which to differentiate the new processors from the current generation.
Socket 754 Sempron 3100+
Not that we can see much with the heat spreader on there, but this processor is more in the tradition of budget processors, as it is based on current Athlon 64 technology with half the cache. Specifically, the Sempron 3100+ has the same size L2 cache as the Tbred Sempron: 256KB. So, AMD started out with a 1MB L2 cache derived from the Opteron, moved to a 512KB cache, and has finally dropped down to 256KB for its budget line of K8 processors.
Socket 754 Sempron 3100+
The other very interesting and pertinent bit of information is that the K8 Sempron does not support x86-64 extensions.
While this may seem like a downside at first, this will actually help out AMD. The K8 Sempron, if cache size doesn't hurt performance too much, will give AMD the ability to offer its current generation of performance to consumers at a lower price point. The performance difference between K7 and K8 architectures on a clock for clock basis is not insignificant, and bringing this to consumers at a more attractive price point is definitely not a bad thing.
Though we won't be able to test it here (we only just received samples from AMD), we will absolutely be looking into overclocking of this part. With x86-64 and half the cache disabled, we may be able to push this part pretty hard. But we'll have to save that for a future update.
Of course, again, the clock for clock comparison part is the Athlon 64 2800+ (running at 1.8GHz). With twice the cache, this part will not be outperformed by the higher rated Sempron part. Again, we feel that this just adds to the confusion in the marketplace. We have to give AMD some credit for successfully pulling off the performance rating system with their mainstream processors, and we were happy that during the Duron's run, they stuck with clocks speeds. Even though Intel's system will be tough to get a hold of for a little while, it's a much more elegant solution to the problem of selling chips based on clock speed than a performance rating meant to reflect clock speed of a theoretical processor.
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draco8099 - Wednesday, July 28, 2004 - link
"Reliability/compatibility hasn't been an issue for a long time. FYI Intel has had 4 recalls in as many years. AMD has never had a recall"I agree that AMD chips are reliable... but AMD does NOT make chipsets.
There where times in the past that I wished VIA or SIS would recall the crap they sometimes produced. Thankfully Nvidia entered the chipset making business.
Bonesdad - Wednesday, July 28, 2004 - link
yah, gotta wonder where he comes up with a statement like "along with the added reliability Intel offers...". This clearly comes from someone with no experience with AMD products. I personally have no qualms about either Intel or AMD when it comes to reliability. But if AMD offers more performance/$$ than Intel, I will always choose AMD.ThePlagiarmaster - Wednesday, July 28, 2004 - link
T8000, You're kidding right? I'll take an Nforce2 with onboard (asus A7n8x-VM/400 $81) over any onboard intel graphics. We're talking geforce4mx here. It can at least play some games. Intel's integrated graphics doesn't even come close even with the 915G chipset.http://www.tomshardware.com/cpu/20040728/sempron-0...
Jeez, up to 3x performance over Intel's integrated graphics...ROFLMAO. You go ahead and buy that Intel integrated crap chipset. BTW the 865/875 is no more current than nforce2. They are both old tech and both decent (uh, except when comparing onboard graphics...nvidia kicks butt here). Last page of toms review: "In addition, motherboards based on the nForce2 Ultra 400 chipset offer more graphics performance than Intel's 865G platform at a similar and sometimes lower price"
So for $81 (asus a7n8x-VM/400) + Sempron 2800 $120 (which is probably REALLY HIGH...more likely $100 when hits pricewatch or less) we have $200 at most. You said it A P4 can beat it for the same money. Well, as soon as you throw in Intel's integrated graphics it doesn't matter what chip you have...YOU LOSE. But you won't spend less than $200 for a P4 and Integrated board. No way. You'd need a P4 2.4 or better just to cache the chip in speed. The graphics is an absolute loss regardless of choices.
Reliability/compatibility hasn't been an issue for a long time. FYI Intel has had 4 recalls in as many years. AMD has never had a recall :)
Zebo - Wednesday, July 28, 2004 - link
"i'm curious how my 2.5ghz barton compares to say a semperon running at 2.0-2.2ghz "Is'nt everyone:)
Socket754 wise I think a sempron is about 10% faster than the mobileXP's at same speeds so 2.2 would probably equal or beat a 2.5 A-XP......Can't wait:):):)
bearxor - Wednesday, July 28, 2004 - link
#27I thought about that angle, and while it should work, the fact of the matter is that mpga478 is about to be just as dead as socket 462. If newer Celeron-D's were LGA 775, you could make a case for a better upgrade path with PCI-e and such.
I'm sorry guys, but I'm comparing the Sempron 2800+ with the Celeron 335, which runs at 2.8ghz. I'm not going to compare the Celeron to the Socket 754 3100+, as its name clearly states its a 3100+. If there was a Celeron running at 3100 or so, then I could compare them.
Comparing between the two 2800 classes, there just doesn't seem to be a nail in the coffin. Someone who is going to buy something like this is going to be happy with either one.
Zebo - Wednesday, July 28, 2004 - link
Derek anything we'd like to see?Yes. I'd like to see you using good aftermarket HS.
Then I think you can get the celeron D to 3.8 to 4.0.
Also, The sempron 3100 is of most intrest to me..as it's already fast, offers cheap MOBOs like the chaintech, and I think will make 2.6 on air easy due to less cache..
Not so impressed with the socketA semprons as I think the moblie Athlons are so much better both in overclcoking and perfromance. Anyway it would be cool to throw a 2600moblie in there at 2.6..
Thanks:)
tfranzese - Wednesday, July 28, 2004 - link
"added reliability Intel offers"Where is it? Don't you read the news, Intel now reliably offers chipset recalls and EEPROM updates just for you.
You're either living in the past or should be on Intel's marketing payroll because you reek of it.
tfranzese - Wednesday, July 28, 2004 - link
"For Sempron Socket 752, I think the added cost of getting a suitable mainboard places it in the price range of a Pentium 4, that will outperform it with ease."Really, can you back that up?
T8000 - Wednesday, July 28, 2004 - link
With these small performance differences, I would say $20 more buys you a current Intel DDR-1/AGP platform (i865 + C335) instead of an old AMD platform (nf400 + S2800). Along with the added reliability Intel offers and the very inexpensive optional "Extreme" 2D graphics you can get, I do not think Sempron Socket A is a sensible choice.For Sempron Socket 752, I think the added cost of getting a suitable mainboard places it in the price range of a Pentium 4, that will outperform it with ease.
So I think there is no reason to be so optimistic about Sempron, especially considering the benchmark selection in this review, that might make Sempron look better then it would in the real world.
DerekWilson - Wednesday, July 28, 2004 - link
Both the K7 and K8 Sempron chips dissipate 62W of power maximally.We hear that mobile chips will be coming out with mobile chips which will be in the 25W-30W range.
I'll update the article with this info.