ATI Radeon HD 5450: DX11 On The Cheap - HotHardware

ATI Radeon HD 5450: DX11 On The Cheap

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If you have already read our coverage of the Radeon HD 5800 series launch, then the block diagram below should look somewhat familiar to you. As we've already mentioned, the new Radeon HD 5450 offers virtually all of the same features of 5800 series; the differences being that the 5450 series is equipped with fewer SIMD engines, and hence fewer stream processors, fewer texture units, and ROPs and it has a narrower external memory interface.


Radeon HD 5450 GPU Block Diagram

Specifically, the Radeon HD 5450 series GPU offers 1 SIMD engine with 80 total Stream Processing Units, 8 Texture Units, and 4 ROPs with a 128-bit GDDR3/2 memory interface. The actual GPU is manufactured using TSMC's 40nm process and is comprised of approximately 292 million transistors.


 


 
ATI Radeon HD 5450

The Radeon HD 5450 we'll be featuring in this article is the 512MB, passively cooled version, pictured above. It is a half-height card that features a relatively large heatsink that cools the GPU and RAM mounted on the front. Please note that the heatsink does encroach on an adjacent slot, so this card should be considered dual-slot.  Typical idle board power is only 6.4w with peak power of around 19.1w, so there is no need for supplemental power connectors here--the 75w offered by a PCIe slot will do. The reference specifications call for a 650MHz GPU clock, with 800MHz memory, for an effective data rate of 1.6Gbps. At those clocks, the Radeon HD 5450 offers a peak texture fillrate of 5.2GTexel/s, 2.6GPixels/s, with 12.8GB/s of memory bandwidth and up to 104 GLOPS of compute performance. We should point out, however, AMD has authorized board partners to offer overclocked boards with memory clocked as high as 900MHz--and this reference card featured a 900MHz memory clock.

The outputs on the Radeon HD 5450 consist of a dual-link DVI output, a DisplayPort output, and a standard VGA output. Any combination of these ports can be used simultaneously.  The card also fully supports 'ATI Eyefinity multi-display technology, with up to three displays.

The backside of the Radeon HD 5450 is exposed, but other than the myriad of surface mounted jellybean components, there isn't much to see. The GPU heatsink retention bracket is visible right about in the center the PCB, but where the card's CrossFire edge connectors are supposed to be there are none. It is up to board partners though, whether or not to outfit their cards with CF connectors, but we doubt that will happen given the card's 3D performance. Please note, that CrossFire is still supported with two of the cards pictured here; transactions will be sent over the PCIe interface, however, instead of the CrossFire bridge.

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Yeah they seem to introduce at least 1 or 2 GPU's a month at least, since the 5870 hit. I just wonder when in Nvidia is going to answer. We have been waiting forever for them to drop a GPU. I have actually been an ATI user for quite some time, although I have had Nvidia cards a few times. Lol, as I mentioned once before I Have an ATI all in Wonder Pro sitting on my dresser in a magnetic bag, It is a first year release from a long time ago. Either way though I like Nvidia to have there capability in the market for 2 reason, if they sufficiently tear ATI up performance wise I could buy one, and it seems to make ATI keep it to the grindstone as well as keeping prices reasonable. The current market has not see a true new Nvidia card for quite some time now.

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LOL! Marco you really wailed on that card lol Not a single low res benchmark lol Nothing you threw at it was playable, which brings up the point... Why have a card that supports a cutting edge tech like DX11 if it can't actually run games at playable frame rates? lol I understand the marketing point of view on it... but it seems kind of pointless to support DX11.

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DX11 isn't only about gaming applications and I'm sure it's easier for them to keep DX11 as it's on the same architecture. Eyfinity isn't only used for gaming either. I can only assume it's up to 3 screens which would be perfect as a cheap office card for those requiring that amount of monitors.

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@acarzt I was thinking the same thing. What's the point of Eyefinity if your graphics card can barely handle high resolution gaming? I was a little disappointed with the drop in performance from the 5870 to the 5670, but the 5450 seems generations behind the 5670!

@Schmich True, that's a plus I hadn't considered. This will make a good media center video card, and good for triple display for office monitors.

ATI has filled in the spectrum in the low to lower-middle GPU section, but they have only three cards that perform better than the GTX 260, the 5850, 5870 and 5970. While Nvidia currently has five that perform better than the 5770, the GTX 260, 275, 280, 285 and 295.

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Don't forget, DX11 support also means support for DirectCompute, so a card like this would be great for an HTPC that's used to so some video encoding, etc.

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Marco C:

Don't forget, DX11 support also means support for DirectCompute, so a card like this would be great for an HTPC that's used to so some video encoding, etc.

 

Hmm, that's the feature that helps with order-independent transparency and raytracing.

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DirectCompute is actually supported on DX10 cards. It was just introduced with DX11.

http://www.nvidia.com/object/directcompute.html

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This card is more of HTPC card not much any kind of game. But you figured even the low end model would put up some better numbers for gaming. Many users do flock to the budget cards to help increase their fps even a little without trying to break their bank.

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At the very least, it gets points for a very cool looking heat-sink. :)

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Well it seems to be THE ONLY half height AMD\ATI card that I can find that supports DirectCompute... so it gets points for that....

But Nvidia has a rather large range of half heights cards that support DirectCompute.

Sooooo AMD\ATI needs to step up their game :-P

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