Following a scoop on the HD 5750, Mymypc.com’s Upon is back with some benchmarks and pictures on the ATI Radeon HD 5770.

Visually, the HD 5770 is a dead match to the body design on the HD 5800 series. It is however, much shorter than the HD 5850 as well as the HD 4800 series.

More details next page.


Update: You may want to skip the bolded UPDATE section for the latest information.

Following a scoop on the HD 5750, Mymypc.com’s Upon is back with some benchmarks and pictures on the ATI Radeon HD 5770.

Visually, the HD 5770 is a dead match to the body design on the HD 5800 series. It is however, much shorter than the HD 5850 as well as the HD 4800 series.

Otherwise, it is a full fledged dual-slot cooler, and comes with the same 4 display outputs as on the HD 5800 series.

The HD 5770 is powered by the compact 180 mm2 Juniper die, which means reasonable power consumption (through a single PCIe connector) as well as an efficient, cool and inexpensive product. The exact specifications are still up in the air. Two camps point at two separate specifications – the classical 10 SIMD 800 SP, and the recently rumoured 14 SIMD 1120 SP. Perhaps today’s benchmarks will give us an idea. According to GPU-Z, the HD 5770 sample tested is running at 850 MHz core, and 1200 MHz fast GDDR5 memory to a 128-bit interface for a memory bandwidth of 77 GB/s.

Co-incidentally, the previous gen HD 4890 also runs at 850 MHz, but features a higher memory bandwidth of 125 GB/s. Coming to the benchmarks, we have 3DMark Vantage GPU scores to analyze. The HD 4890 scores 10327, whereas the HD 5770 lags behind at 8714. At first glance, this might lead us to conclude that the HD 5770 might be 800 SP after all, losing out to the HD 4890 due to the lower memory bandwidth. The feature tests end up being a bizarre mismatch, though in the final scores, the HD 5770 ends up significantly behind the HD 4890 and more importantly, the GTX 260 – a card it must beat on performance.

The HD 5770 may be 1120 SP, as echoed by e-tailers, and suggested by the shader related feature tests. However, other tests show it ending up significantly slower than similarly clocked 800 SP parts, bandwidth limited or not. Assuming these benchmarks are true, 800 SP is the more likely possibility. In the end, these test results are largely inconclusive (being a single synthetic test, after all), and we will take all these values with a big sack of salt. The most probable reason may be immature drivers. We will wait for proper benchmarks to appear on release drivers, when the HD 5700 series officially releases on 13th October. Hopefully, it will fare better against the HD 4890 and the GTX 260/275 then.

Full benchmarks and pictures available at Mymypc.com

UPDATE: The Czechs have done it again. Extrahardware.cz has leaked AMD slides concerning the HD 5700 series. There are a few surprises in store.

Firstly, 10 SIMDs it is – 800 SP / 40 TMU. This is identical to HD 4800 series. The HD 5770 clocks at 850 MHz, and will end up slightly slower than the HD 4890 and the GTX 275 (on account of the lower memory bandwidth, despite the minor architectural improvements). We can attribute the poor performance in the mymypc benchmarks to immature drivers. However, non-reference OC versions can see the HD 5770 surpassing both the 4890 and the GTX 275. More importantly, in addition to the much extended feature set, the HD 5770 is debuting at a remarkable price point – $159, nearly $50 less than the 4890/275. Furthermore, the TDP is 108W – nearly half that of the GTX 275, not to mention an almost negligible 18W idle consumption. The GTX 260 / 4870 1GB currently retail at $159 – and there is no doubt the HD 5770 will end up faster.

HD 5750 will sport 9 SIMD units – i.e. 720 SP / 36 TMU clocked at 700 MHz. We can expect performance to be slightly faster than the HD 4850 and the GTS 250, while ending up priced about the same. Prices start at $109 for the 512MB and $129 for the 1GB versions, respectively.

The pricing is what strikes out at first – AMD have been very aggressive. The end result is that the HD 5700 series makes HD 4850, 4870, 4890 and GTX 260, 275 and GTS 250 irrelevant. We can expect the HD 4770 to fall in price well into two figures till Cedar and Redwood are released in January 2010. There have been rumours of Nvidia terminating the above-mentioned products, something Nvidia have denied. Certainly, we don’t see any sense in picking up any card other than a HD 5750 or a HD 5770 in the $100-$200 segment, unless we can pick up a GTX 275 or a HD 4890 for well below $150. Needless to say, it is unlikely anyone can make a profit from a product based on a 480mm2 GT200b die selling at less than $150. AMD will EOL the rejuvenating HD 4800 series.

At this point, it is interesting as to how widely the 1120 SP rumour circulated, even appearing on various e-tail websites. The origin of this rumour is perhaps Anandtech, who had seen a 14 SIMD part being simulated. Instead of 1120 SP, we get a much lower price than expected. The problem for AMD here is a void between the $159 HD 5770 and the $259 HD 5850. Surely, we can expect a ~$200 HD 5830 to come along, and maybe that is the 14 SIMD part everyone’s talking about (Although 16 SIMD will make more sense. Let’s not ignore the HD 5890 rumours too.)