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AMD’s 740G: From Obscurity To Your Desktop

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3:00 AM - 08/19/2008 by Chris Angelini

We’re glad that someone at AMD let us know about the 740G chipset; else it likely would have slipped under the radar. Not that we would have been missing something new—740G is really one part 690G and one part SB700, yielding a mixed platform centering on old technology, but still able to serve up a respectable list of features. The bright side is that 740G-based motherboards are priced anywhere from $55 to $65 dollars.

The 740G Northbridge

AMD’s 740G connects to a Socket AM2 interface by means of its HyperTransport 1.0 interface. If you were planning on building a budget box using an Athlon X2 anyway, the step back from HyperTransport 3.0 won’t affect performance at all. But if you instead use a Phenom X3 or X4, the chipset will force those CPUs to run at a 1 GHz interface speed.

Naturally, because memory support is determined by the processor you choose (and its integrated memory controller), the 740G shouldn’t affect you there. However, it is worth noting that the integrated graphics core—unaided by onboard side-port memory—relies on memory bandwidth performance for gaming. If you drop in an Athlon X2, as we have for our most value-oriented configuration, you’ll top out at 800 MHz DDR2 memory. Swap in a Phenom X4 9850 for comparison and you’ll have the bandwidth of 1066 MHz modules at your disposal instead.

Can the graphics core even do anything with that extra memory throughput? After all, the 740G is derived from AMD’s 690G, which takes its design cues from the old ATI Radeon X700. It includes four pixel pipelines that satisfy Microsoft’s DirectX 9 SM 2.0b specification—a far cry from the Shader Model 4.0 parts we’ve spent so much time playing with lately. The core runs at 400 MHz, and the BIOS included with our Gigabyte MA74GM-S2 allows manual overclocking of the GPU, though the 80nm part isn’t likely to be as flexible as the 55nm 780G. A pair of independent display outputs (VGA and DVI in the case of our sample) sets the stage for as many as four monitor outputs if you add an inexpensive discrete board.

Remember, this is older technology. So while AMD does include its Avivo video processing engine, it isn’t the Avivo HD block introduced with AMD’s DirectX 10 parts. You do get scaling support, decode acceleration for MPEG-2, and 3:2 pulldown detection. Not part of the package is acceleration of Blu-ray content—a handicap that you’ll see manifest itself in our benchmarks.

The SB700 Southbridge

All there is to know about AMD’s SB700 southbridge is already known. And it’s hardly exciting after the announcement of SB750 alongside the 790GX platform. Nevertheless SB700 is at least a step up from the SB600 component that accompanied 690G. With SB700, you get six SATA 3 Gb/s ports with RAID 0, 1, and 10 support (RAID 5 surfaced with SB750). The I/O controller also enables 14 USB ports, 12 of which are of the USB 2.0 variety. And of course, the southbridge has the same troubles with AHCI as AMD’s other storage components. We tried to get Vista installed with AHCI enabled, just to be sure, and the setup hung before completing.

The Platform

More important than the chipset itself is the platform we’re building with it. Truly a product of penny-pinching in the name of science, we actually put together quite the collection of go-fast hardware.

740G Platform
Motherboard Gigabyte MA74GM-S2
Processor AMD Athlon X2 4850e @ 2.5 GHz
Memory 4 GB (2 x 2 GB) Corsair Dominator DDR2-1066 5-5-5
Graphics Radeon 2100 Integrated
Hard Drive Seagate Barracuda 7200.11 500 GB SATA 3 Gb/s

Total cost for the platform, sans optical drive (grab a dual-layer DVD burner for $35) and chassis (InWin’s BK623 with a 300W power supply runs $60) is about $360. With those other components, you’re looking at a $450 machine. Spend an extra $50 on graphics, and the platform becomes even more capable.

The benefits of this setup are clearly upfront cost- and energy-related. Though the CPU runs at 2.5 GHz and sports two cores (each with 512 KB of L2), it’s a 45 W part sitting on a microATX motherboard with integrated graphics. In fact, you could probably shave $75 off the price by stepping back to 2GB of DDR2-800 (we used Corsair’s Dominator modules for the sake of drawing an even comparison to the other benchmarked configurations).

Talkback
Anonymous 08/19/2008 10:07 AM
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-12+

Well. It seem like virtualisation was left out as consider multi-core is critical for running virtualise application.

apache_lives 08/19/2008 10:12 AM
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-5+

waste of time to read, its been known for years that you dont compare clock speeds (in this case, 2.53ghz) - you compare price points! Wheres an Intel Quad? or a lower end Intel like a E4600 etc? and after all that BS, why the cheap AMD board thats "$10 - $15 less" against that expensive ass intel board? pffftttt

The_Trutherizer 08/19/2008 10:14 AM
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-11+

I completely don't get the point of the phenom 9850 in this review. Isn't this supposed to be a comparison of budget, workstation systems with dual core CPUs? Why put it in there? If you put a current Intel quad core in for consideration then it's power consumption would be high as well.

What exactly are you trying to prove here? In any case. Any idiot knows that currently Intel's Dual core is the ideal processor. Currently of course.

And what the hell were you thinking with the motherboard? A 740G? You even state in your conclusion that the 780G is a more fair comparison to the G45? Of course it is! Why did you even review the 740G then?

I mean what a conflicting hodge podge of an article!

genored 08/19/2008 10:30 AM
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-18+

If you haven't bought a new computer in 6 years don't do a review about your epic fail of picking computer parts. I mean your just embarrassing....

rtfm 08/19/2008 11:00 AM
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-15+

If you give a million monkeys a typwriter, one of them will write a T.H article... Seriously, most of the readers of this site are well informed, this king of waffle is no good

curryj02 08/19/2008 12:11 PM
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-20+

so quad isn't worth it now... what about in six years. just as Hyper Threading has kept his P4 going so long, going quad will have the same effect. Quad doesn't scale now, but in six years? dual core will seem like single core is now - quad core = new dual core. Just my two cents

addiktion 08/19/2008 12:28 PM
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-5+

I currently run a Q6600 (3GZ OC) and it has done wonders for me. Take it I do a lot of Adobe Photoshop, gaming, coding, and generally have about 20-30+ windows open at one time which I would consider my "business" & "entertainment" use.

If you add virtualization into the mix the quad core definitely has saved me. I don't experience any hiccups and now that I've migrated to 64 bit I've noticed a subtle gain in overall computing too.

I think the highest I've hit on all my cores with extensive testing is 60-70%. This was running a few browser windows + 4 scanning programs at the same time and I did get some slow down due to my hard drive read/write speeds maxing out but nothing from the CPU. Which to me leaves plenty of room for what I actually do.

Eventually when more software actually catches up to using 4 cores it'll be better utilized I suppose but for the most part I'm happy with it and I think you'll be happy with a dual or quad core.

fepple 08/19/2008 1:41 PM
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-12+

Running HL2:EP2 as a benchmark is pretty silly when its only single threaded

"shocking news! new super car max speed only 30mph in residential areas"

Monsta 08/19/2008 2:13 PM
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jitpublisher 08/19/2008 2:30 PM
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-10+

Nothing surprising, interesting, or useful about this. Am I missing something, was the article incomplete and posted early? Just don't get it.

KT_Wasp 08/19/2008 2:40 PM
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-16+

Wow...

So, six years ago..in 2002.. you purchased the second fastest CPU on the market (first being a P4 Northwood 3.02GHz). And this is he main reason it was able to last so long.. becuase you bought a CPU that was at the top of the performance "food chain" at that time.

Now your looking at upgrading to a PC that you hope to last another six years, but your looking at Hardware that is at the lower end of the same "food chain". How on earth do you think that will work ?

This article is useless dribble written by a person that has no buisness writing on a PC tech website....

iocedmyself 08/19/2008 2:51 PM
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-17+

Seriously, i want an answer to this question Mr.Guilty editor..

HOW OUT OF TOUCH CAN ALL OF YOU AT THG POSSIBLY GET?!?

How can you possibly expect anyone to put any stock in your advice, your findings or even you basic hardware knowledge after starting the "article" out by admiting that you, someone that tests and reviews hardware for a living, is not only using a 6 year old CPU, but an Intel pentium 4...at 2.8ghz. Your cpu of choice is not only based on arguably the worst cpu arch produced in the last 15 years (possibly second only to the original itanium) but not even the best performing PoS out of the entire craptastic line. Performance is marginally better than a P3 at 1.8ghz, if at all, memory performance is laughable even by intel standards and the cpu can easily double as a hot-plate when you get a late night craving for scrambled eggs... and a nice thick steak. The fact that you have a workstation gpu paired with such a horrid cpu further baffles what kind of broken logic has been used over the years to justify continued use.

Given the massive shift in the quality of THG content, it's not a suprising confession, but still depressing in light of the fact that so many ill-informed readers trust the findings of THG articles at face value. There is really no exscuse. For ssssshhhhhhaaaaaammmmme.

Aside from the fact that you compare one of the older based AMD boards tech's against the newest considerably more expensive intel IGP board, the exscuse of "it being the cheapest of the low power/low price option is either a very thinly vieled means of manipulation, or is just "one of the cheap-er" options. The use of a 9850 phenom on a 740G board is just stupid. Aside from the painfully obvious performance issues created by sticking a $200 cpu on a $60 board (something that i can only picture being done by the most unknowledgable of people capable of building their own computer) a 780G is actually only $6 more expensive at...$66. Which gets you an IGP with DX10 capability from DX9.0b.

I can only assume that the idiotic trend of using 32bit vista as test system was continued here, though i didn't see my assumption confirmed or denied, it should be noted that 64bit Vista ultimate can actually be run on a 780G board using a single core 1.8ghz semperon and still be capable of smooth B-Ray/HD video playback. 32bit Vista only actually taking advantage of 2 gigs of ram, regardless of the 3.56 gigs that may be acknowledged by task manager makes for a much cheaper base componet cost.

Foxconn A7GM-S AM2+/AM2 AMD 780G ---------------------------------$ 66
AMD Sempron LE-1100 Sparta 1.9GHz Socket AM2 45W Single-Core------$ 25
PNY OPTIMA 2GB (2 x 1GB) DDR2 SDRAM DDR2 800 (PC2 6400)-----------$ 39
SAMSUNG Spinpoint F1 HD502lJ 500GB 7200 RPM SATA 3.0Gb------------$ 69
Total Base hardware cost------------------------------------------$199

That would be the cheapest Vista capable AMD system loosely following the system guidelines. However if you have any interest in an equally priced comparison yagainst the intel system.


G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)-----$ 89
GIGABYTE GA-MA790GP-DS4H AM2+/AM2 AMD 790GX ----------------------$135
AMD Phenom 9150E 1.8GHz Socket AM2+ 65W Quad-Core ----------------$170
SAMSUNG Spinpoint F1 HD502lJ 500GB 7200 RPM SATA 3.0Gb------------$ 69
Total base componet cost------------------------------------------$463

I list the 9150E as it's low power and aimed at bussiness systems, as this is what the build is supposed to reflect....an office desktop, i think it's fitting. Granted you could go with a regular old phenom for around the same price, could drop down to a 780g board and save $70 or so, chances are the average actual upgrade, and not new build will not require the cost of a hard-disk.

All the damaged evidence considered, is made even more pointless by your choice to go with the 780G board which you chose not to use in the review. Nor did you choose to do any virtualization benches....probably because that is yet another on the long list of things intel can't do well,,,,

I'm continually amazed, every other day i read an article on THG and actually say aloud to myself "they can't possibly do anything worse then what i just read" but you guys seem to prove me wrong at every turn.

You seem to always be able to become increasingly misinformed.

cangelini 08/19/2008 2:55 PM
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JPForums 08/19/2008 2:55 PM
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-11+

Chris Angelini,
It has already been mentioned (even by you), but I feel it needs to be reiterated.
A 780G based board would have been much better for this comparison.
(It would be even better to have both the 740G and the 780G)

You can't really get a feel for the benefits of quad core if your hardware, admittedly, is bottlenecking it, but not the dual core.
Then there is the issue of the graphics performance.
If the graphics and/or video decode performance is important to you, then the ~$15 difference for the upgrade that will do it should be assumed. (Especially when comparing to a platform that you claim costs ~$110 more)

If you really wanted to answer the question of whether or not you should go with a quad core processor you should've done two things.
1) Use an AMD board that doesn't bottleneck one or the other processor.
2) Add a low end Intel quad core to the mix.

You'll likely still come to the same conclusion that the extra money for a quad core in a cheaper system like this is currently better spent on the graphics card, but you'll have data to back it up. You'll also have a better idea of what quad cores really bring to the table.

You constantly comment on how a 780G/790GX would show much better results. You also mention that a 780G only cost ~$15 more. Finally, after all of the testing, you conclude that you should disregard the article completely and you get a board based on a chipset that you mentioned, but didn't bother to test. I have to conclude that you know what you should be doing, but for some reason (Upper management, agenda, lack of time, laziness, money or lack there of, etc.) you don't do it. I encourage readers to do the same as you did. Disregard this article in its entirety and use previous knowledge to make your decisions.

If you don't find an article useful, why should we? Consider this the next time you decide to print an article that gives little or no relevant information to the reader. A few simple changes and/or additions would have made this article worth reading. I realize it takes more time, but I'm much more satisfied with an article that is late, but well thought out, than one that even the author doesn't feel is pertinent to his buying decisions.

cangelini 08/19/2008 2:58 PM
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masterwhitman 08/19/2008 3:01 PM
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-7+

apache_lives :
waste of time to read, its been known for years that you dont compare clock speeds (in this case, 2.53ghz) - you compare price points! Wheres an Intel Quad http://en.wikipedia.org/wiki/QUaD ? or a lower end Intel like a E4600 etc? and after all that BS, why the cheap AMD board thats "$10 - $15 less" against that expensive ass intel board? pffftttt



I have to completely agree. A 780G board can be had for as little as $54 online. Why on earth would someone choose a lesser solution at the same price point? Unless, of course, it could have something to do w/cross-promotion of IDF or something...

cangelini 08/19/2008 3:02 PM
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cangelini 08/19/2008 3:08 PM
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-1+

curryj02 :
so quad isn't worth it now... what about in six years. just as Hyper Threading has kept his P4 going so long, going quad will have the same effect. Quad doesn't scale now, but in six years? dual core will seem like single core is now - quad core = new dual core. Just my two cents



Thanks for the feedback Curry--and you bring up a good point. For those who are buying for the long-term, when the software industry is likely to have caught up, quad-core might be more worth the investment today. Cheers!

jimmysmitty 08/19/2008 3:12 PM
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-1+

fepple :
Running HL2:EP2 as a benchmark is pretty silly when its only single threaded"shocking news! new super car max speed only 30mph in residential areas"



Actually its a great test of CPU performance since Source is very CPU limited. If you take a older Pentium D vs a Core 2 in TF2 or HL2 you will see that the Core 2 will do better.

cangelini 08/19/2008 3:13 PM
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