ATI Radeon HD 5770 and 5750 Mainstream DX11 GPUs - HotHardware

ATI Radeon HD 5770 and 5750 Mainstream DX11 GPUs

5 thumbs up

Although the Radeon HD 5770 and Radeon HD 5750 are powered by the same GPU, there are some notable differences between the two cards that we should point out.

As you can see in the chart above, the Radeon HD 5770 and 5750 sport the same 1.04B transistor GPU, manufactured using TSMC's 40nm process. The lower-end Radeon HD 5750, however, has a lower stock engine clock than the 5770 (700MHz vs. 850MHz) and 80 fewer stream processors (720 vs. 800). The 5750 also has four fewer texture units and a lower stock memory clock, which results in a lower texture fillrate and less peak memory bandwidth.

Due to its pared down design, the Radeon HD 5750 also has lower power ratings. Idle power for the Radeon HD 5750 and 5770 are an impressive 16W and 18W, respectively, with maximum board power ratings of 86W and 108W. All things considered, the specifications for the Radeon HD 5770 and 5750 very much resemble last year's Radeon HD 4870 and 4850, but with DX11 support and few other new bells and whistles.

Despite being comprised of over a billion transistors though, the Radeon HD 5700 series GPU is relatively small. The picture above shows a dime next to the GPU as it appears on the Radeon HD 5750, sans cooler. Actual die size is 166mm2 for those keeping score.


ATI Radeon HD 5770 Reference Card

Which brings us to the cards. From the front, the Radeon HD 5770 looks very much like the Radeon HD 5870 and 5850 cards that launched over the last few weeks, although the 5770 has a shorter PCB. Cards are equipped with a black fan shroud, with a red stripe running down the middle, that encases the entire front side of the card. The cooler has a barrel fan that draws air into the shroud, where it is forced through the heatsink and partially exhausted from the system through vents in the card's mounting plate. Two more vents at the back of the card also direct some air within the system.

The outputs on the Radeon HD 5770 consist of dual, dual-link DVI outputs, an HDMI output (with audio) and a DisplayPort output. Any combination of three of these ports can be used, and of course the card fully supports the ATI Eyefinity multi-display technology, with up to three displays.

The backside of the Radeon HD 5770 is exposed, but other than the myriad of surface mounted components there isn't much to see. The GPU heatsink retention bracket is visible right about in the center the PCB, with the card's dual CrossFire edge connectors a couple of inches away at the top corner.

As we've mentioned, total board power is rated at 108 watts. As such, the Radeon HD 5770 requires only a single 6-pin PCI Express power connector. Stock frequencies are listed in the chart above, along with peak fillrate and memory bandwidth, and cards are outfitted with 1GB of GDDR5 memory.


ATI Radeon HD 5750 Reference Card

The Radeon HD 5750 has an even simpler design than the 5770. The PCB on the card is even shorter than the 5770's and a simple, round heatsink / fan combo sits atop the GPU. The rest of the board, including the back side and VRM, is exposed. The 5750 has the same output configuration as its big brother, with come with either 1GB or 512MB of GDDR5 memory, and it too requires only a single 6-pin PCI Express supplemental power connector.

Article Index:

+ -

Beautiful review Marco, the 5770/5750 with its lower power consumption seems to be the card I would want in my laptop, though the 5850 offers the best power-performance ratio in my opinion.

I am confused about one thing. The GTX 260, as you've stated, can be had for the same price (FRYS even has an OC GTX 260 for ~$130 AR). Since it offers better performance for the same price, the 5770 would not be the better option, right?

On a side note, I'm even more impressed with the 5850 after reading this review.

+ -

Good review.

That cooler on the 5750 looks wicked bad - like a muscle-car. I think it looks even better than the batmobillish 5770.

+ -

Disappointing performance.  The 5770 is the same price as the GTX 260 but gets beaten back by it every time.  The lower power consumption makes this a cheaper card in actuality, but it's slower.  So if you demand a certain level of performance this card will simply not do.

I wish the review had more relevant cards.  No one in the market for a $159 or $129 card is looking at the GTX 285, eww god no.  The GTS 250, 4850 1GB, 4870 and even 4770 are all within or very close to this price range and frankly should have been compared rather than the 285 and 5850.  The 4850 goes even with the 5750 most of the time - sometimes better.  Even the 512MB version sometimes.  And considering you can get that for less than $100 it would have been an ample comparison.

My recommendations are to not buy these.  Even if you value low power consumption, they just don't meet their price point.  5750 kinda does, but the 5770 is oddly placed.  ATi needs a 4890 performance level DX11 card.  Maybe a 5830 is in the works?  Right now there's a gigantic gap between the 5770 and 5850 and that's quite disappointing.  Again, if you demand a certain minimum level of performance then lower power consumption is irrelevant.  If you can't afford the $259 5850 you're gonna be attracted to the $189 4890.  But with high power, no DX11, it's hard to go for.  But the 4890 quite clearly is much faster than the 5770... so what the heck are you gonna do if your budget is $180-$210?  I'm very disappointed by ATi right now for not having a 5830 that matches 4890 performance.  And I totally understand someone buying a 4870 over a 5770 because it's up to $30 cheaper after rebate and performs faster.  Bah.

+ -

It's not all bad though. For one thing, the 4870 and the 5770 match up very well, offering similar performance, but the 5770 comes equipped with DirectX 11 as well as EyeFinity.

The performance might be lagging at this price point, but perhaps the premium is worth future proofing against DX11?

+ -

It's worth it to wait and spend a little extra on the 5870 card.

+ -

The only true game that I have enjoy in DirectX 10 was Assasins Creed. I would love to see that game in DirectX 11. Looking forward in DirectX games and obviously the tecnology it brings

Login or Register to Comment
Post a Comment
Username:   Password: