[Rant] Pentium IV Prototype at 3.5 GHz | ANN.lu |
Posted on 29-Aug-2001 09:05 GMT by Christian Kemp | 41 comments View flat View list |
Solar (BAUD) wrote:
PPC vs x86, Intel vs AMD, believe me folks I´d like to see PPC rule the market, but this looks like x86 is here to stay. I think it´s interesting to see what will be tomorrow, even if it has little to do with Amiga today.
Yes, I know that GHz isn´t everything, but that´s a *lot* of GHz to make up for with superior (?) architecture...
From Heise Online:
"In the early morning, shortly after 8 AM local time, [Intel] presented a prototype of a 0.13µm Pentium-4 (Northwood), which - shortly - ran at 3.5 GHz.
On average, the IDF record breaking CPUs reach the market after roughly a year. The 2 GHz type that started production yesterday was also presented as a prototype on last year´s IDF. So we can expect the 3.5 GHz Pentium 4 in late summer 2002. In general, so Otellini, the architecture can be scaled up to 10 GHz."
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Pentium IV Prototype at 3.5 GHz : Comment 13 of 41 | ANN.lu |
Posted by Graham on 28-Aug-2001 22:00 GMT | In reply to Comment 8 (): <<All the tests I've seen suggest that a 1.4G Athlon is roughly comparable to a 1.7G Pentium (socket 423).>>
The i850 chipset also supports Socket 478, btw. The tests I have seen put a 1.4GHz Athlon at about the speed of a P4 2GHz on i850 with socket 478. The P4 wins media benchmarks, Quake III and memory bandwidth, the Athlon everything else, for 1/5th the price.
<<Reason I say socket 423 is that they use the Intel 850 chipset and so use rambus memory which has a bandwidth at the lower end of DDR DRAM (which the 1.4G Athlon uses).>>
i850 uses dual channel RDRAM to get a high-latency 3.2GB/s bandwidth - much more than a single channel DDR bandwidth of 2.1GB/s (2.7GB/s soon). DDR has much lower latency than RDRAM though.
<<It has been suggested that the Athlon is only able to be comparable at the mo because it can achieve higher data rates to and from memory.>>
No it hasn't. It can't. It competes because of its superior architecture, albeit an architecture designed for 500MHz -> 4GHz over its lifetime, not 1.4GHz -> 10GHz. In fact, the opposite is true, the P4 compares to the Athlon only because of its huge bandwidth. AMD will release the longer pipelined Clawhammer and Sledgehammer processors next year, which will push performance really high. Intel must be worried about that, hence their MHz push at the moment. Shame that the market is in a slump, eh?
<<The new P4's (socket 478) are utter shit, as they use Intels 845 chipset, so using SDR DRAM.>>
Wrong. i850 supports both S423 and S478. i845 supports both S423 and S478. The new socket is required for higher speeds, as more power needs to be supplied to the processor. It is also about the best thing about the P4, a dinky cute socket.
<<Tests have shown that 2G pentiums (478) are no better whatsoever than the Athlons.>>
Tests have shown that a 1.8GHz P4 on i845 performs like a 1.2GHz Athlon if it is lucky. P4 + SDRAMcrap.
<<But in 6 months time, there'll be another revision of the Pentium which'll use DDR DRAM.>>
You mean now, don't you? And it isn't the processor that supports RDRAM or DDRRAM, it is the chipset. VIA P4X266 supports PC2100 DDR RAM. i845DDR only supports PC1600... SiS645 supports PC2700 DDR RAM!
<<Coupled with frequencies that are supposedly going to be starting around the 2.2 to 2.4G, you may see a wider margin appearing between the Pentium and Athlon, irrespective of the 20 pipeline stages. >>
Yes, and AMD will have 1.53GHz Palomino Athlons out in the first week of October, which will be equivalent to a 2.2GHz P4. Palomino supports SSE and prefetch, hence it will have even better performance.
<<To the question earlier of why all the GHz, well, the GHz is a great marketing ploy.>>
I will agree here.
<<As for who would use this number of cycles, in the greatest numbers it would be the game player. Increase in CPU cycles can increase framerate (as the P4 tests have demonstrated in the main). >>
Increase in memory bandwidth can increase framerate. Usage of SSE and SSE2 instructions can increase framerate. Increase of MHz when using the same processor can increase framerate.
AMD seem to be going towards a PR (P4R?) style system for their processors however. Don't be surprised to see the 1.533GHz Athlon being sold as the "Athlon 2200"...
Graham |
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