Ps4 vs pc-RAM

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blacksaber55

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Aug 15, 2013
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Simply put-
By reading about Ps4 ram I hv deduced-
It provides Gddr5 graphic ram and 8 gb ddr3 ram. Gddr5 ram contains ddr3 ram as given by Wikipedia.
Only problem is Ps4 has 8 gb ram at 5500 mhz.
Can 16 gb ddr3 ram overpower it. (at 1600 or 1866 or 2600 mhz)
 
Solution
sciophobiaranger


No. It is based on DDR3, it does not CONTAIN DDR3. Most Nvidia graphics cards contain GDDR5 anyway. GDDR5 is DRAM graphics card memory. It is not the same as DDR3. They have their uses. The GDDR5 moves a lot of data but at a lower speed, as gameboy said. DDR3 runs at a higher voltage than GDDR5. DDR3 uses a 64-bit memory controller per channel, whereas GDDR5 is paired with controllers of a nominal 32-bit. DDR3 benefits from low latency whereas GDDR5 is the opposite. Most...
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yes and no
gddr5 memory is wayyyy faster than ddr3 memory however the utilization of this memory in the ps4 made it so that it is the only memory having also the os run on it making it a bit slower so having separate memory hypothetically is better than only having gddr5
 
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Your assumption is fully wrong! GDDR5 has higher speeds but high latency as well. But DDR3 has lower bandwidth but lower latency had well. Your graphic card uses GDDR5 actually.

For now I would say go with 8GB of 1866MHz or more RAM.
 
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GDDR5 does not "contain" DDR3, it is derived from DDR3.

The biggest conceptual difference between DDR3 and GDDR5 is that GDDR5 is designed with memory access patterns of GPUs in mind rather than memory access patterns of CPUs.

The memory access patterns of GPUs are very sequential and very bursty over a fairly well localized region of memory. CPUs... not so much.

As far as technical implementation goes, most of the differences are aimed purely towards enhancing these sequential and bursty IO operations. GDDR5 features more IO pins (16 or 32 per IC for GDDR5, compared to 8 or 16 for DDR3) which improves circuit board layout. There are additional commands for block writes (writing the same data to an entire region of memory), and bit masking (writing partial words). The internal column cycle reads or writes 256 bits per two write clock cycles (there are two write clock cycles per command clock cycle) as opposed to 64 or 128 bits for DDR3 per bus cycle depending on arrangement. Of particular interest to us is that GDDR5 is restricted to a 256 bit access. This is great for GPUs which are interested in a full 256 bit block almost all the time (they're streaming vector machines), but CPUs are more interested in bits and pieces that are spread out all over the place.

All of the additional internals found in GDDR5 come at a price. The integrated circuits are more expensive, and the arrangement of components leaves less room for actual memory. GDDR5 commonly comes in 1 gigabit and 2 gigabit chips, whereas DDR3 is available in 4 gigabit modules that are smaller in smaller packages and with fewer pins. The higher data rate also necessitates a much larger thermal envelope. DDR3 can get away without a heatsink, GDDR5 cannot.
 
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Technically nothing won't. Even the highest end Nvidia GTX Titan has 6GB of GDDR5 RAM. The RAM architecture of PS4 is very different from PCs.

The PS4 uses Video RAM which is useful for moving large amount of data at once but with less speed (Think of a 18 Wheeler) but no so effective in delivering small amounts of data fast (Think of a motorcycle).

In most tasks you will be needing a motorcycle (DDR3) but GPUs usually transfer large amount of data like textures at once (18 Wheeler). Each RAM does what it is supposed to do effectively.

In Verdict, If you are building a Gaming PC under 1000$ any Name Brand (Kingston, Corsair etc) 8GB 1600Mhz or more RAM will do.
 
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No. It is based on DDR3, it does not CONTAIN DDR3. Most Nvidia graphics cards contain GDDR5 anyway. GDDR5 is DRAM graphics card memory. It is not the same as DDR3. They have their uses. The GDDR5 moves a lot of data but at a lower speed, as gameboy said. DDR3 runs at a higher voltage than GDDR5. DDR3 uses a 64-bit memory controller per channel, whereas GDDR5 is paired with controllers of a nominal 32-bit. DDR3 benefits from low latency whereas GDDR5 is the opposite. Most gaming PCs already have GDDR5 implemented in their systems - if they have a AMD or NVIDIA graphics card in them. GDDR is similar to DDR but optimized for bandwidth. The GDDR5 memory had lots of bandwidth, but with this bandwidth came lots of latency. DDR3 makes up the gap somewhat by being snapper in terms of latency. The latency on GDDR5 and DDR3 memory does vary some, but the typical CAS latency of most sticks of DDR3 is between 7 and 9. GDDR5 RAM is a typical latency of about 15. GPUs, however, are made to be extremely tolerant of latency. If you take the CAS of both, and then multiply it by the clock speed – you get the ns of delay. So the PS4 will have lots of bandwidth for graphics. But it loses out on latency so the cpu will suffer some. Unlike the PS4, the typical modern gaming PC uses GDDR5 just for graphics and DDR3 for everything else in terms of random memory, which makes the PC better in terms of memory. It is not putting all of its "stuff" (for lack of a better word) on one set of memory, so it is better. The PC uses these types of memory for what they were made for, unlike the PS4.
 
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