The IGP Chronicles Part 1: Intel's G45 & Motherboard Roundup
by Anand Lal Shimpi & Gary Key on September 24, 2008 12:00 PM EST- Posted in
- Motherboards
Blu-ray Playback: Integrated Graphics Matters Again
We've already established that integrated graphics don't really matter for gaming. Those who are serious about games have a discrete card, those who aren't serious about games are either playing something that doesn't require 3D acceleration or plays well on everything. There is a small group that this doesn't apply to but I'd bet that you can fit the vast majority of users into one of the two aforementioned categories.
Over a decade ago, integrated graphics performance mattered for another very important reason - 2D performance. These days most all IGPs handle basic Windows performance just fine, so if you're not using integrated graphics for gaming, is there any reason to care about one over another?
Video playback emerged as a killer application for integrated graphics over the years, and with Blu-ray's emergence as the de facto high definition media standard the need for some minimum level of IGP performance was established.
CPU utilization during high bitrate Blu-ray playback is prohibitively high, thankfully we now have the transistor budget to include the entire H.264, VC1 and MPEG-2 decode pipeline on GPUs. As chipsets also shrunk in manufacturing process, the hardware Blu-ray acceleration functions also found their way into integrated graphics cores. It started with AMD and NVIDIA but now Intel is on-board.
G45 is Intel's first chipset to include support for full hardware H.264/MPEG-2/VC-1 decode acceleration, including the entire H.264 decode pipeline (CABAC/CAVLAC entropy decoding included). This support puts Intel's integrated graphics on-par with the feature set of ATI/NVIDIA IGPs as well.
It gets even better for home theater PC enthusiasts: G45 continues Intel's recent tradition of including support for 8-channel LPCM audio output over HDMI, a feature that has been around since the G965 days. NVIDIA supports 8-channel LPCM audio output over HDMI with its chipsets while AMD only offers 2-channel LPCM. I recently went through and explained exactly what this feature means but if you're looking to build a Blu-ray compatible HTPC with many speakers, it's a useful feature.
G45 Blu-ray Playback
The first incarnation of G45 had horrible Blu-ray playback issues, it just didn't work. Since then Intel has gone through numerous driver revisions and we're finally at the point where, with the latest drivers (15.11.2.1554) that Blu-ray acceleration just works. It's supremely disappointing that it took Intel this long to fix these issues but they are at least finally taken care of.
CPU utilization, as you would expect, goes down with hardware acceleration enabled.
| Blu-ray Playback with a Celeron Dual Core E1200 | Intel G45 | Intel G35 |
| Dave Matthews - Live at Radio City (VC-1) | 55.5% | 73.2% |
| Crank (MPEG-2) | 37.6% | 53.2% |
| The Simpsons Movie (H.264) | 51.2% | 95.9% |
With a Celeron Dual Core E1200 processor, CPU utilization while playing a Blu-ray movie goes down tremendously, especially during H.264 playback. On faster CPUs the end result is even more manageable:
| Blu-ray Playback with a Core 2 Duo E7200 | Intel G45 | Intel G35 |
| Dave Matthews - Live at Radio City (VC-1) | 31.4% | 44.2% |
| Crank (MPEG-2) | 27.4% | 36.3% |
| The Simpsons Movie (H.264) | 24.9% | 67.6% |
The gap between the hardware accelerated G45 and its predecessor actually shrinks in the lighter load scenarios with a faster processor, but the difference when decoding H.264 is still impressive.
8-channel LPCM but no 24Hz Playback
Intel was extremely forward looking in its support of 8-channel LPCM audio over HDMI back on the G965 chipset; only within the past year have its competitors caught up. As I mentioned before, there's a thorough explanation of what 8-channel LPCM over HDMI means in our recent article here, but if you've got a 6 or 8 channel speaker setup and want to play Blu-ray movies, this feature is quite useful.
I tested 8-channel LPCM on G45 and, as expected, it just worked. Unfortunately there's still no 24bit playback support, which Intel is blaming on the ISVs for not supporting at this time - but technically there's no reason that it wouldn't work on G45 if there was proper driver/software support.
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Imperor - Sunday, September 28, 2008 - link
Impressive how many people just rant on about the review being inadequate when they obviously didn't even read the start of it! If they did that they'd know that reviews of AMD and nVidia boards are coming up and that all will be compared eventually!I get the feeling that the people talking about "Intel fanbois" tend to have the same kind of appreciation of another brand...
Stating the obvious isn't being partial. It just so happens that AMD don't even come close to competing with Intel in the CPU department! Sure AMD might be cheaper, but there are cheap Intels out there as well. The whole platform tends to get a bit more expensive when you go with Intel but you get what you pay for. I'm perfectly happy with my G35+E2140. Does everything a computer is supposed to do but gaming. I'm not a gamer, so that is a non-issue for me.
Very tempted to go mini-ITX with 1,5TB HDD. Tiny box and lots of diskspace!
Found a nice case for it as well, Morex Venus 668. Not that I know anything about it really but it'll hold up to 3 HDDs and a full size ODD and probably house decent cooling for the CPU while still being tiny (~8"x9"x13").
robg1701 - Saturday, September 27, 2008 - link
Do any of the boards support Dual-Link DVI?Im getting a bit sick of having to include a video card in otherwise low power boxes in order to drive my 30" monitor :)
deruberhanyok - Friday, September 26, 2008 - link
[quote]We struggled with G45 for much of the early weeks of its release, but the platform wasn't problem-free enough for a launch-day review.[/quote]You weren't serious here, were you? That basically says "The chipset had problems so we didn't want to write a review talking about them."
piesquared - Friday, September 26, 2008 - link
Does this sight have an ounce of integrity left? I seriously doubt it. Nothing but Intel pandering left here. You "reviewers" have the gaul to do a review of this attempt at an IGP, yet fail to show any review of either an AMD IGP if it proves how inverior G45 is. Are you seriously implying that people are so stupid that they aren't capable of seeing through this BS? I remember something about a SB750 promise somewhere around 2 months ago that never materialized, then a 790gx promise that never materialized, then another 790gx roundup, that not only never materialized, but the DFI preview article seems to have actually vanished, then the AMD IGP part II looks to be delayed or something, probably vanished due to Intel's poor performance.I am really really starting to wonder if AT was purchased by Intel. All evidence points to it. If not, then call a spade a spade and don't make promises you can't keep. I'm sure you think none of this matters because you're so popular that people will read no matter what you write here. I wouldn't be so confident if I were AT.
TA152H - Thursday, September 25, 2008 - link
I can tell you guys are really working on gaining that female readership. As everyone knows, women really go for that low-class, vulgar language.Also, who would want to get rid of PS/2 ports? Whoever on your staff wants this, better have something more than they hate anything legacy. Where's the logic in adding two extra USB ports so you can remove the PS/2 ports? It's not like it's more flexible, really, because you pretty much always need the keyboard and mouse. When's the last time you were in the situation where you said "Oh, I won't be needing my mouse and keyboard today, and I'm so strapped for USB ports, it's a good thing I can use the ones I normally use for the keyboard and mouse for something else". Doubtful you've ever said it, and if you have, you have issues deeper than I am capable of dealing with.
It's not like the keyboard or mouse work better in the USB port, or that it's somehow superior in this configuration. In fact, the PS/2 ports were made specifically for this, and are perfectly adequate for it. Didn't you guys know that USB has more overhead than the PS/2 ports? I guess not. So, you worry about fractions of a percent going from motherboard to motherboard with the same chipset, but you prefer to use a USB mouse and keyboard? I just do not understand that. USB was a nice invention of Intel to suck up CPU power so you'd need a faster processor. It's a pity this has been forgotten.
Sure, let's the replace the efficient with the inefficient, so we can say we're done with the legacy ports and we can all feel like we've moved forward. Yes, that's real progress we want. Good grief.
CSMR - Friday, September 26, 2008 - link
Yeah I had to get a quad core so I can dedicate one core to the USB mouse and one to the USB keyboard. Now I can type ultra fast and the mouse really zips around the screen.MrFoo1 - Thursday, September 25, 2008 - link
Non-integrated graphics cards are discrete, not discreet.discreet = modest/prudent/unnoticeable
discrete = constituting a separate entity
dev0lution - Thursday, September 25, 2008 - link
I really dislike the trend of recent reviews that go off on tangents about the state of the market, or particular vendor performance gripes and then the rest of the review doesn't even touch on relevant benchmarks or features to back up these rants. If you're going to complain about IGP performance from AMD or NVIDIA, you might want to back that up with at least ONE board being included in the comparison charts. Who cares if Intel G45 gets bad frame rates against itself (across the board to boot). Why not show how 3 IGP chipsets from the major vendors stack up against each other in something mainstream like Spore? If it's a G45 only review, how about you save the side comments for a true IGP roundup? Sorry, but if you have the time to post a "(p)review" that brings up competitive aspects with no benchmarks to balance out those comments, it's basically single-vendor propaganda - nothing in the conclusions deal with whether a IGP in the same price range from another vendor would fill the void that G45 clearly does not fill.Since when does issues at the release date mean you can't post the review? "We struggled with G45 for much of the early weeks of its release, but the platform wasn't problem-free enough for a launch-day review." - Ummm, might want to include that as disclosure in all your other post-launch day reviews!?! Or do other vendors get brownie points for being problem-free when you can actually buy the product?
Unfortunately, the inconsistency across multiple reviews make it somewhat difficult to compare competing products from multiple vendors because the methodology varies between single chipset and competitive benchmarks, even when you can separate the irrelevant introductory comments and bias from the particular author from the rest of the review.
More authors obviously does not equal consistency or more relevant reviews..
yyrkoon - Thursday, September 25, 2008 - link
Looking forward to your review of this board(if I understood you correctly), as I have been keeping an eye on this board for a while now. Perfect for an all around general use board(minus gaming of course), but would have been really REALLY nice if that 1x PCIe slot were a 16x PCIe with atleast 8x bandwidth. Hell I think i would settle with 4xPCIe speeds, just to have the ability to use an AMD/ATI 3650/3670 in this system. I think Jetway has a similar board with a 16x PCIe slot, slightly less features, at the cost of like $350 usd . . .Now if someone reputable (meaning someone who can actually make a solid board from the START *cough*ABIT*cough*) using the Core 2 mobile CPU, SO-DIMMs, etc, AT A REASONABLE PRICE . . . I think I might be in power consumption heaven. Running my desktop 'beast' tends to drain the battery banks dry ; )
iwodo - Wednesday, September 24, 2008 - link
I wonder if Anand could answer a few questions we have in our mind.Why with a generation Die Shrink we only get 2 extra Shader instead of like 4 - 6? Where did all the extra available die space went?
With the New Radeon HD 4x series, people have consistent result they can get single digit CPU usage when viewing 1080P H.264 with a E7xxx Series CPU, or slightly more then 15% when using an old Celeron. This is 2 - 3 times better then G45!!!! Even 780G is a lot better then G45 as well. So why such a HUGE difference in performance of so called Hardware Accelerated Decoding?