Excerpt: As a general rule, our belief is that pairing two slow-performing cards using SLI or CrossFire is a bad idea—you’re usually better off running a single faster card. However, the Radeon 4850 X2 delivers astounding performance compared to the single-GPU boards in its price range, spanking the Radeon 4870 and the GeForce GTX 280, with none of the pitfalls that have plagued dual-GPU boards in the past.
Pros: Killer performance for $300. Four DVI ports! Faster than a GTX 280.
Cons: GDDR3 hurts memory bandwidth. Four DVI ports leave no room for rear exhaust vents.
Summary: When looked at from a pure performance standpoint, then the Sapphire HD 4850 X2 is among the top cards on the market. It beats the NVIDIA GeForce GTX 280 by about 3%. What is also very interesting is that in higher resolutions the HD 4850 X2 can also beat the bigger brother, the HD 4870 X2. The exact cause of this is unknown, but my educated guess is that it has to do with the slower timings of the GDDR5 memory on the HD 4870 X2.
Pros: Great performance, Lots of overclocking potential left, Better average performance per Dollar ratio than GTX 280, Beats HD 4870 X2 in high resolutions, DirectX 10.1 support
Cons: Extremely noisy card, CrossFire does not work in windowed 3D, Hot air not exhaust out of the case, Complex overclocking process, Dual GPU design - depends on optimum driver support, Long PCB, No support for CUDA/PhysX
Summary: Sapphire has been making some of the best ATI-based video cards for a while, and the Sapphire 4850 X2 is no exception. The board is well constructed, and the heatsinks are better than what you expect for OEM. Because of the layout of the board (namely the bridge chip in the center), you will be limited on the third-party heatsinks that will fit.
The board absolutely screams past competition from nVidia, but only in games that fully support Crossfire mode.
Summary: Sapphire have done extremely well with their Toxic HD4850, and by including a pre-installed, all copper Zalman VF900 cooler, they have successfully addressed the issue of excess heat from the original Radeon HD4850. The overall performance is is very good, producing excellent results in our all benchmarks, and coming out on top for very test. This is all thanks to an overclocked GPU and memory.
Summary: Sapphire's HD4850 is very similar to MSI's R4850 both in terms of performance and speed. Well, it's not surprising as both cards are based on AMD/ATI's referernce designs. In all of our benchmarks the peformance was very good. No complaints here.
Like the MSI R4850, the Sapphire Radeon HD4850 uses the same RV770 Pro GPU with a clock speed of 625Mhz, but their GDDR3 memory runs slightly faster at 1996Mhz (2 x 993Mhz).
Conclusion: It was a real shame that it wasn’t possible to compare any cards to the 4850, as in terms of bang for buck, we haven’t seen anything this good since the 8800GT last year. It may not be the cheapest card around, but it’s performance for the money is great. It also packs a quiet cooler and a fantastic software bundle. The only problem I could foresee is that it does get very hot, so adjusting the fan speed manually may be a good idea for those with a hot case.
Pros: Good performance, Great bang for buck, Quiet, Single slot cooler
Conclusion: Suorituskyky kortilla on testin parhaimmistoa lukuun ottamatta sähkönkulutusta, jossa kortti on yllättäen selvästi tehonälkäisempi kuin Club3D:n vastaava kortti. Sapphirella on hieman korkeammat kellotaajuudet m ...